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The Tensile Strength of Petung Bamboo Fiber Reinforced Epoxy Composites: The Effects of Alkali Treatment, Composites Manufacturing, and Water Absorption

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IOP Conference Series: Materials Science and Engineering 2019年第1期547卷

作者： Gunawan Refiadi Yusi Syamsiar Hermawan Judawisastra Mechanical Engineering Vocational Education Study Program College of Teacher Training and Education (STKIP) Sebelas April Jl. Anggrek Situ 10 Sumedang 45323 Indonesia Textile Chemistry Department Polytechnic of Textile Technology Jl. Jakarta 31 Bandung 40272 Indonesia Material Engineering Department Faculty of Mechanical and Aerospace Engineering Bandung Institute of Technology (ITB) Jl. Ganesha 10 Bandung 40132 Indonesia

Natural fiber application due to its competitiveness attracted many research in green composites. However, the tensile properties of natural fiber composites might be influenced by several factors such as treatment of the fibers, manufacturing processes, and water absorption levels. In this research, we use petung bamboo fibers as natural fibers candidate for a good reinforcement in green composites. The study focused on the tensile property of bamboo fiber reinforced epoxy composites due to alkali treatment, manufacturing process, and water absorption. The composites were made with three variations: the fibers were varied without and with alkaline treatment (5% NaOH); manual lay-up method and hot press were applied as manufacturing variation; moisture content in the composites was varied in dry condition and after water absorption treatment. Tensile testing and Scanning Electron Microscope (SEM), were performed to improve tensile strength of composite and fiber-matrix interface quality. The alkali treatment has less effect to the tensile strength than of the volume fraction gain and the void content. Composite manufacturing by hot press has a significant effect to the improvement of tensile strength up to 37% compare to the hand lay-up method. Water absorption up to 8.8% had decreased the tensile strength of composites up to 29%. The alkali treatment on the bamboo fibers had effectively reduced water absorption into the composite as well as the tensile strength reduction.

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Design and properties of blended sandwich non-drip PA6/Lenzing Fr®/Pbi fiber nonwoven fabrics

Design and properties of blended sandwich non-drip PA6/Lenzi...

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SAMPE Seattle 2017 Conference

作者： Yao, Lan Wu, Hao Capelli, Lucas Koo, Joseph. H. Krifa, Mourad Donghua University Department of High-Tech Textiles College of Textiles No. 2999 North Renmin Road Shanghai201620 China Dept. of Mechanical Engineering University of Texas at Austin 204 E. Dean Keeton-C2200 AustinTX78712 United States Materials Science and Engineering Program University of Texas at Austin AustinTX78712 United States School of Human Ecology-Textile and Apparel Technology University of Texas at Austin A270 AustinTX78712 United States

In the current thermal protective clothing systems, maximizing the personal protection performance against fire and heat is in great demand. Additionally, minimizing the manufacturing cost by using low-cost materials is also a critical factor. In the previous study, a new type of low-cost flame resistant (FR) non-drip Polyamide 6 (PA6) fiber was developed. In this paper, this FR non-drip PA6 fiber was tested in blends with two inherently FR fibers to form FR nonwoven fabrics. Different formulations of varying blending ratios of these three fibers were processed into nonwoven fabrics. The vertical flame resistance and the thermal properties were characterized. Tensile tests were conducted to characterize mechanical properties of these FR nonwoven fabrics. The water vapor permeability test was also performed to measure the wearability of the fabric. Results of several polymer blends were compared to find the optimum formulation which will be used as low-cost thermal protective fabric in the future. © Copyright 2017. Used by the Society of the Advancement of Material and Process Engineering with permission.

关键词： Fibers

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Self-Compassion Around the World: Measurement Invariance of the Short Form of the Self-Compassion Scale (SCS-SF) Across 65 Nations, 40 Languages, Gender Identities, and Age Groups

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Mindfulness 2025年 1-28页

作者： Swami, Viren Tran, Ulrich S. Voracek, Martin Aavik, Toivo Ranjbar, Hamed Abdollahpour Adebayo, Sulaiman Olanrewaju Afhami, Reza Ahmed, Oli Aimé, Annie Akel, Marwan Al Halbusi, Hussam Alexias, George Ali, Khawla F. Alp-Dal, Nursel Alsalhani, Anas B. Álvarez-Solas, Sara Amaral, Ana Carolina Soares Andrianto, Sonny Aspden, Trefor Argyrides, Marios Aruta, John Jamir Benzon R. Atkin, Stephen Ayandele, Olusola Baceviciene, Migle Bahbouh, Radvan Ballesio, Andrea Barron, David Bellard, Ashleigh Bender, Sóley Sesselja Beydaǧ, Kerime Derya Birovljević, Gorana Blackburn, Marie-Ève Borja-Alvarez, Teresita Borowiec, Joanna Bozogáňová, Miroslava Bratland-Sanda, Solfrid Browning, Matthew H. E. M. Brytek-Matera, Anna Burakova, Marina Çakır-Koçak, Yeliz Camacho, Pablo Camilleri, Vittorio Emanuele Cazzato, Valentina Cerea, Silvia Chaiwutikornwanich, Apitchaya Chaleeraktrakoon, Trawin Chambers, Tim Chen, Qing-Wei Chen, Xin Chien, Chin-Lung Chobthamkit, Phatthanakit Choompunuch, Bovornpot Compte, Emilio J. Corrigan, Jennifer Cosmas, Getrude Cowden, Richard G. Czepczor-Bernat, Kamila Czub, Marcin da Silva, Wanderson Roberto Dadfar, Mahboubeh Dalley, Simon E. Dany, Lionel Datu, Jesus Alfonso D. de Carvalho, Pedro Henrique Berbert de Holanda Coelho, Gabriel Lins De Jesus, Avila Odia S. Debbabi, Sonia Harzallah Dhakal, Sandesh Di Bernardo, Francesca Dimitrova, Donka D. Dion, Jacinthe Dixson, Barnaby Donofrio, Stacey M. Drysch, Marius Du, Hongfei Dzhambov, Angel M. El-Jor, Claire Enea, Violeta Eskin, Mehmet Farbod, Farinaz Farrugia, Lorleen Fian, Leonie Fisher, Maryanne L. Folwarczny, Michał Frederick, David A. Fuller-Tyszkiewicz, Matthew Furnham, Adrian García, Antonio Alías Geller, Shulamit Ghisi, Marta Ghorbani, Alireza Martinez, Maria Angeles Gomez Gradidge, Sarah Graf, Sylvie Grano, Caterina Gyene, Gyöngyvér Hallit, Souheil Hamdan, Motasem Handelzalts, Jonathan E. Hanel, Paul H. P. Hawks, Steven R. Hekmati, Issa Helmy, Mai Hill, Tetiana Hina, Farah Holenweger, Geraldine Hřebíčková, Martina Ijabadeniyi, Olasupo Augustine Imam, Asma İ School of Psychology and Sport Science Anglia Ruskin University Cambridge United Kingdom Centre for Psychological Medicine Perdana University Kuala Lumpur Malaysia Department of Cognition Emotion and Methods in Psychology Faculty of Psychology University of Vienna Vienna Austria Institute of Psychology University of Tartu Tartu Estonia Department of Psychology Istinye University Istanbul Turkey Department of Psychology and Behavioural Studies Ekiti State University Ado-Ekiti Nigeria Department of Art Studies Tarbiat Modares University Tehran Iran Department of Psychology University of Chittagong Chattogram Bangladesh Department of Psychoeducation and Psychology Université du Québec en Outaouais Saint-Jérôme Canada INSPECT-LB: National Institute of Public Health Clinical Epidemiology and Toxicology Beirut Lebanon School of Pharmacy Lebanese International University Beirut Lebanon Department of Management Ahmed Bin Mohammad Military College Doha Qatar Faculty of Psychology Panteion University of Social and Political Sciences Athens Greece Royal College of Surgeons Ireland-Bahrain Adliya Bahrain Department of Midwifery Faculty of Health Sciences Munzur University Tunceli Turkey Department of Oral Medicine and Diagnostic Sciences Vision College of Dentistry and Nursing Vision Colleges Riyadh Saudi Arabia Facultad de Salud Universidad Internacional de La Rioja Logroño Spain Science and Technology of Southeast Minas Gerais Federal Institute of Education Barbacena Brazil Department of Psychology Universitas Islam Indonesia Yogyakarta Indonesia Department of Psychology Aberystwyth University Ceredigion United Kingdom Department of Psychology Neapolis University Pafos Paphos Cyprus Department of Psychology De La Salle University Manila Philippines Department of General Studies The Polytechnic Ibadan Nigeria Department of Psychology University of Ibadan Ibadan Nigeria Health Research and Innovation Science Centre Faculty of Health Sciences Klai

Objectives: The 12-item Self-Compassion Scale–Short Form (SCS–SF) is a widely used instrument for the assessment of self-compassion. To date, there have been few examinations of this instrument’s psychometric properties, particularly across nations and languages. Therefore, we used data from the Body Image in Nature Survey (BINS) to assess measurement invariance of the SCS–SF across nations, languages, gender identities, and age groups. Methods: Participants (N = 56,968) from 65 nations completed the SCS–SF in 40 languages. Using these data, we tested various hypothesised models of the SCS–SF in the total sample and, using multi-group confirmatory factor analysis, tested for invariance of the optimal model across national groups, languages, gender identities, and age groups. Results: In the total dataset, we found that an 11-item, 2-factor model (i.e., SCS-11) provided best fit to the data, with the two factors tapping distinct constructs of compassionate and uncompassionate self-responding. The SCS-11 was found to be partially scalar invariant across national groups and languages, and fully scalar invariant across gender identities and age groups. There was wide variation in latent means for the two factors, particularly across national groups and languages. Further analyses showed negligible associations between the two factors and sociodemographic variables, including marital status, financial security, and urbanicity. Conclusions: Our results suggest that it may be possible to derive a stable 2-factor model of the SCS–SF for use in cross-cultural research, but also highlight the likelihood of cross-national and cross-linguistic variations in the way that self-compassion is understood. © The Author(s) 2025.

关键词： Cross-cultural Measurement invariance Multi-group confirmatory factor analysis (MG-CFA) Self-Compassion Scale Short Form

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Surface morphology and flammability of two flame resistant fibers and their blended nonwoven fabrics

Surface morphology and flammability of two flame resistant f...

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SAMPE Long Beach 2016 Conference and Exhibition

作者： Yao, Lan Koo, Joseph H. Wu, Hao Krifa, Mourad Donghua University Department of High-tech Textiles College of Textiles No. 2999 North Renmin Road Shanghai201620 China University of Texas at Austin Dept. of Mechanical Engineering 204 E. Dean Keeton-C2200 AustinTX78712 United States Materials Science and Engineering Materials and Science Program University of Texas at Austin AustinTX78712 United States School of Human Ecology-Textile and Apparel Technology University of Texas at Austin A270 AustinTX78712 United States

ISBN: (纸本)9781934551233

Protective clothing is essential for fire and heat protection in numerous professions. Instead of using flame resistant (FR) fabric finishing, the inherently FR fibers can be considered due to their long wear-life and durability. In this study, polybenzimidazole (PBI) fiber and Lenzing FR® fiber were selected to form FR nonwoven fabrics. The fiber surface structures were observed by Scanning Electron Microscopy (SEM) showing different structures for the two types of fibers. Typical flammability parameters including heat release rate (HRR) and heat release capacity (HRC) were tested for the two fibers using the Microscale Combustion Calorimeter (MCC). Both PBI and Lenzing FR® fibers show their high flame and heat resistance properties using MCC. In addition, the 20/80 PBI/Lenzing FR® blended nonwoven fabric was designed, fabricated, and tested. In general, the measured HRR results from MCC test showed relatively good agreement with the calculated peaks of Lenzing FR® and PBI fibers, showing the rule of mixtures for the HRRs for the blending fabrics. In the flame resistance test, the after-flame time of the fabric from the test is approximately 0.5s. The mean value of the char length of the as-received fabric is 3.8±0.89 inches. No melting or dripping were observed during the combustion. Copyright 2016. Used by the Society of the Advancement of Material and Process Engineering with permission.

关键词： Fibers

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Bioprinting: 3D Bioprinting: from Benches to Translational Applications (Small 23/2019)

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Small 2019年第23期15卷

作者： Marcel Alexander Heinrich Wanjun Liu Andrea Jimenez Jingzhou Yang Ali Akpek Xiao Liu Qingmeng Pi Xuan Mu Ning Hu Raymond Michel Schiffelers Jai Prakash Jingwei Xie Yu Shrike Zhang Division of Engineering in Medicine Department of Medicine Brigham and Women's Hospital Harvard Medical School Cambridge MA 02139 USA Department of Biomaterials Science and Technology Section Targeted Therapeutics Technical Medical Centre University of Twente Enschede 7500AE The Netherlands Key Laboratory of Textile Science and Technology College of Textiles Donghua University Shanghai 201620 P. R. China Biomedical Engineering Laboratory Instituto Tecnológico y de Estudios Superiores de Monterrey Monterrey Nuevo León 64849 Mexico Center of Biomedical Materials 3D Printing National Engineering Laboratory for Polymer Complex Structure Additive Manufacturing Baoding 071000 P. R. China Department of Bioengineering Gebze Technical University 41400 Gebze Kocaeli Turkey Sabanci University Nanotechnology Research and Application Center Sabancı University 34956 Tuzla Istanbul Turkey Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education School of Biological Science and Medical Engineering Beijing Advanced Innovation Center for Biomedical Engineering Beihang University Beijing 100083 China Department of Plastic and Reconstructive Surgery Renji Hospital Shanghai Jiao Tong University School of Medicine Shanghai 200127 P. R. China Biosensor National Special Laboratory Key Laboratory of Biomedical Engineering of Education Ministry Department of Biomedical Engineering Zhejiang University Hangzhou 310027 P. R. China Department of Clinical Chemistry and Hematology University Medical Center Utrecht Utrecht 3584 CX The Netherlands Holland Regenerative Medicine Program University of Nebraska Medical Center Omaha NE 68198 USA

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Critical Review—Narrow-Band Emission of Nitride Phosphors for Light-Emitting Diodes: Perspectives and Opportunities

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ECS Journal of Solid State Science and technology 2017年第1期7卷

作者： Julius L. Leaño Jr. Mu-Huai Fang Ru-Shi Liu Department of Chemistry National Taiwan University Taipei 106 Taiwan Nanoscience and Technology Program Taiwan International Graduate Program Academia Sinica and National Taiwan University Taipei 106 Taiwan Philippine Textile Research Institute Department of Science and Technology Taguig City 1631 Philippines Department of Mechanical Engineering and Graduate Institute of Manufacturing Technology National Taipei University of Technology Taipei 106 Taiwan E-mail: rsliu@ntu.edu.tw This paper is a Critical Review in Electrochemical and Solid State Science and Technology (CRES3T). This article was reviewed by Anant Setlur (setlur@***) and Jing Wang (ceswj@***).This paper is part of the JSS Focus Issue on Visible and Infrared Phosphor Research and Applications.

Searching for narrow-band red-emitting and thermally stable phosphors is the ultimate strategy toward enhanced performance of phosphor converted light emitting diodes (pc-LED). The red emission is assured by the nitride host because of its relatively more covalent character than oxides and sulfides; however, the narrow emission is attributed to crystallographic, morphological, and electronic considerations. The symmetric coordination site ensures equal ligand effect in all direction fits well with the configuration of Eu2+ f orbitals in the excited state, as observed in cuboid nitrides. Further, thermal stability is ascribed not only to suitable bandgap but more specifically, a relatively distant location of the lowest 5d level from the bottom of the conduction band (CB) that consequently entails high energy to quench excited electrons by exciting them further up to the CB. Modes toward the development of new nitride hosts with potentially narrow-band emission have been identified. A viewpoint on light-emitting diode (LED), backlighting, and laser lighting, which remains the most economically-rewarding phosphors application, is presented. Other exciting frontiers, such as agricultural illumination and persistent luminescence, maximize nitride systems that have other properties other than the stringent narrow-band red emission and excellent thermal stability required for the desired improvement of the mainstream LED application.

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Body appreciation around the world: Measurement invariance of the Body Appreciation Scale-2 (BAS-2) across 65 nations, 40 languages, gender identities, and age

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Body image 2023年 46卷 449-466页

作者： Viren Swami Ulrich S Tran Stefan Stieger Toivo Aavik Hamed Abdollahpour Ranjbar Sulaiman Olanrewaju Adebayo Reza Afhami Oli Ahmed Annie Aimé Marwan Akel Hussam Al Halbusi George Alexias Khawla F Ali Nursel Alp-Dal Anas B Alsalhani Sara Álvares-Solas Ana Carolina Soares Amaral Sonny Andrianto Trefor Aspden Marios Argyrides John Jamir Benzon R Aruta Stephen Atkin Olusola Ayandele Migle Baceviciene Radvan Bahbouh Andrea Ballesio David Barron Ashleigh Bellard Sóley Sesselja Bender Kerime Derya Beydağ Gorana Birovljević Marie-Ève Blackburn Teresita Borja-Alvarez Joanna Borowiec Miroslava Bozogáňová Solfrid Bratland-Sanda Matthew H E M Browning Anna Brytek-Matera Marina Burakova Yeliz Çakır-Koçak Pablo Camacho Vittorio Emanuele Camilleri Valentina Cazzato Silvia Cerea Apitchaya Chaiwutikornwanich Trawin Chaleeraktrakoon Tim Chambers Qing-Wei Chen Xin Chen Chin-Lung Chien Phatthanakit Chobthamkit Bovornpot Choompunuch Emilio J Compte Jennifer Corrigan Getrude Cosmas Richard G Cowden Kamila Czepczor-Bernat Marcin Czub Wanderson Roberto da Silva Mahboubeh Dadfar Simon E Dalley Lionel Dany Jesus Alfonso D Datu Pedro Henrique Berbert de Carvalho Gabriel Lins de Holanda Coelho Avila Odia S De Jesus Sonia Harzallah Debbabi Sandesh Dhakal Francesca Di Bernardo Donka D Dimitrova Jacinthe Dion Barnaby Dixson Stacey M Donofrio Marius Drysch Hongfei Du Angel M Dzhambov Claire El-Jor Violeta Enea Mehmet Eskin Farinaz Farbod Lorleen Farrugia Leonie Fian Maryanne L Fisher Michał Folwarczny David A Frederick Matthew Fuller-Tyszkiewicz Adrian Furnham Antonio Alías García Shulamit Geller Marta Ghisi Alireza Ghorbani Maria Angeles Gomez Martinez Sarah Gradidge Sylvie Graf Caterina Grano Gyöngyvér Gyene Souheil Hallit Motasem Hamdan Jonathan E Handelzalts Paul H P Hanel Steven R Hawks Issa Hekmati Mai Helmy Tetiana Hill Farah Hina Geraldine Holenweger Martina Hřebíčková Olasupo Augustine Ijabadeniyi Asma Imam Başak İnce Natalia Irrazabal Rasa Jankauskiene Ding-Yu Jiang Micaela Jiménez-Borja Verónica Jiménez-Borja Evan M Johnson Veljko Jov School of Psychology and Sport Science Anglia Ruskin University Cambridge United Kingdom Centre for Psychological Medicine Perdana University Kuala Lumpur Malaysia. Electronic address: viren.swami@aru.ac.uk. Department of Cognition Emotion and Methods in Psychology Faculty of Psychology University of Vienna Vienna Austria. Department of Psychology and Psychodynamics Karl Landsteiner University of Health Sciences Krems an der Donau Austria. Institute of Psychology University of Tartu Tartu Estonia. Department of Psychology Koç University Istanbul Turkiye. Department of Psychology and Behavioural Studies Ekiti State University Ado-Ekiti Nigeria. Department of Art Studies Tarbiat Modares University Tehran Iran. Department of Psychology University of Chittagong Chattogram Bangladesh. Department of Psychoeducation and Psychology Université du Québec en Outaouais Saint-Jérôme Canada. INSPECT-LB: National Institute of Public Health Clinical Epidemiology and Toxicology Beirut Lebanon School of Pharmacy Lebanese International University Beirut Lebanon. Department of Management Ahmed Bin Mohammad Military College Doha Qatar. Faculty of Psychology Panteion University of Social and Political Sciences Athens Greece. Royal College of Surgeons Ireland-Bahrain Adliya Bahrain. Department of Midwifery Faculty of Health Sciences Munzur University Tunceli Turkiya. Department of Oral Medicine and Diagnostic Sciences Vision College of Dentistry and Nursing Vision Colleges Riyadh Saudi Arabia. Facultad de Ciencias de la Vida Universidad Regional Amazónica Ikiam Muyuna Ecuador. Federal Institute of Education Science and Technology of Southeast Minas Gerais Barbacena Brazil. Department of Psychology Universitas Islam Indonesia Yogyakarta Indonesia. Department of Psychology Aberystwyth University Ceredigion United Kingdom. Department of Psychology Neapolis University Pafos Paphos Cyprus. Department of Psychology De La Salle University Phillippines. Department of Gen

The Body Appreciation Scale-2 (BAS-2) is a widely used measure of a core facet of the positive body image construct. However, extant research concerning measurement invariance of the BAS-2 across a large number of nations remains limited. Here, we utilised the Body Image in Nature (BINS) dataset - with data collected between 2020 and 2022 - to assess measurement invariance of the BAS-2 across 65 nations, 40 languages, gender identities, and age groups. Multi-group confirmatory factor analysis indicated that full scalar invariance was upheld across all nations, languages, gender identities, and age groups, suggesting that the unidimensional BAS-2 model has widespread applicability. There were large differences across nations and languages in latent body appreciation, while differences across gender identities and age groups were negligible-to-small. Additionally, greater body appreciation was significantly associated with higher life satisfaction, being single (versus being married or in a committed relationship), and greater rurality (versus urbanicity). Across a subset of nations where nation-level data were available, greater body appreciation was also significantly associated with greater cultural distance from the United States and greater relative income inequality. These findings suggest that the BAS-2 likely captures a near-universal conceptualisation of the body appreciation construct, which should facilitate further cross-cultural research.

关键词： Body appreciation Body appreciation Scale-2 (BAS-2) Cross-cultural Measurement invariance Multi-group confirmatory factor analysis (MG-CFA) Psychometrics Structural analysis

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Flame retardant nylon 6 fibers by melt-spinning

Flame retardant nylon 6 fibers by melt-spinning

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SAMPE Long Beach 2016 Conference and Exhibition

作者： Wu, Hao Krifa, Mourad Koo, Joseph H. Materials Science and Engineering Program Texas Materials Institute University of Texas at Austin 204 E. Dean Keeton St. C2200 AustinTX78712 United States School of Human Ecology-Textile and Apparel Technology University of Texas at Austin 200 W 24th St. A2700 AustinTX78712 United States Department of Mechanical Engineering University of Texas at Austin 204 E. Dean Keeton St. C2200 AustinTX78712 United States

ISBN: (纸本)9781934551233

Previous studies on injection molded samples have yielded non-drip flame retardant nylon 6 nanocomposite through the infusion of nanoclay and non-halogenated intumescent particles (FR) via co-rotating twin-screw extrusion. In addition, rubber toughening was found to be an effective approach to recovering the loss of ductility of the nanocomposite formulations while preserving the non-drip FR performance of the bulk material. This study aims to transfer the knowledge from injection molded bulk samples to melt spun fibers. Thus, non-drip flame retardant nylon 6 nanocomposite fibers were processed by melt spinning. Melt viscosity, fiber morphology, microstructure and flammability properties are discussed in this report. Copyright 2016. Used by the Society of the Advancement of Material and Process Engineering with permission.

关键词： Melt spinning

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Rubber toughening of flame retardant polyamide 6 nanocomposite systems 2

Rubber toughening of flame retardant polyamide 6 nanocomposi...

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2nd Annual Composites and Advanced Materials Expo, CAMX 2015

作者： Wu, Hao Krifa, Mourad Koo, Joseph H. Materials Science and Engineering Program Texas Materials Institute University of Texas at Austin 204 E. Dean Keeton St. C2200 AustinTX78712 United States School of Human Ecology-Textile and Apparel Technology University of Texas at Austin 204 E. Dean Keeton St. C2200 AustinTX78712 United States Department of Mechanical Engineering University of Texas at Austin 204 E. Dean Keeton St. C2200 AustinTX78712 United States

Previous studies indicate that although flame-retardant modified polyamide 6 shows effective reduction in heat release capacity, it suffers significant loss in ductility. In this study, elastomer toughening is explored as a means of recovering ductility of polyamide 6/ intumescent flame retardant composite systems. This was achieved using a maleic anhydride modified SBR elastomer incorporated into the system by melt blending. MCC Flammability tests show that the blends with elastomers exhibit slightly improved flame retardant properties compared to the original polyamide 6/intumescent flame retardant system however the UL-94 rating of elastomer toughened samples were only rated as V-1. Therfore nanoclay was introduced as a fourth component to perform as a synergistic additive to the intumescent flame retardants. With small amount (5wt.%) of nanoclay, a UL-94 V-0 rating was achieved with even lower flame retardant concentreation (15wt.% flame retardant and 10wt.% elastomer). Tensile tests show that the incorporation of flame retardant additives and elastomers degrade the tensile strength compared to neat polyamide 6. On the other hand, the addition of flame retardant enhanced the tensile modulus, while the addition of elastomers succeeded in partially recovering the lost elongation at break. Copyright 2015 by Hao Wu. Published by CAMX-The Composites and Advanced Materials Expo with permission.

关键词： Flame retardants

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Functionalized nafen™ alumina nanofiber (ANF) reinforced polyamide 6 nanocomposites: Mechanical, thermal and flame retardant properties

Functionalized nafen™ alumina nanofiber (ANF) reinforced po...

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SAMPE Baltimore 2015 Conference and Exhibition

作者： Wu, Hao Krifa, Mourad Koo, Joseph H. University of Texas at Austin AustinTX78712 United States Materials Science and Engineering Program Texas Materials Institute University of Texas at Austin 204 E. Dean Keeton St. C2200 AustinTX78712 United States School of Human Ecology-Textile and Apparel Technology University of Texas at Austin 1 University Station A2700 AustinTX78712 United States Department of Mechanical Engineering University of Texas at Austin 204 E. Dean Keeton St. C2200 AustinTX78712 United States

ISBN: (纸本)9781934551196

Nafen™ alumina nanofibers (ANF) have the potential to improve material's mechanical and flame retardant properties when uniformly dispersed in the polymer matrix. In this study, various concentrations of Nafen™ ANF were incorporated in polyamide 6 (PA6) nanocomposites by co-rotating twin screw extrusion. Before the extrusion process, the ANFs were prepared using both ultra-sonication and planetary centrifugal mixing in order to pulverize agglomerates and obtain separated alumina nanofibers. The separated ANFs were then functionalized in order to obtain good interfacial properties with the PA6 matrix. TEM images indicate a homogeneous dispersion of ANF within PA6. There is no significant difference in both FTIR spectra and thermal stabilities tested by TGA and DSC. Low concentrations of ANF have minimal effect on flammability, further increasing the ANF concentration may lead to lower flammability but the results in this report are not significant. Mechanical tensile test results are also reported. Copyright 2015. Used by the Society of the Advancement of Material and Process Engineering with permission.

关键词： Nanocomposites

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