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Effect of particle size, solvent to sludge ratio and solvent temperature on the extraction of lipids from sewage sludge cake using methanol

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AIP Conference Proceedings 2024年第1期2923卷

作者： Nor Afifah Khalil Aiman Danial Azri Aida Syafiqah Abd. Rahman Mohd Faizar Banjar Ahmad Noor Syimir Fizal Norkhairihairi Ahmad Muzafar Zulkifli Wirach Taweepreda Md. Sohrab Hossain Ahmad Naim Ahmad Yahaya Green Chemistry and Sustainability Cluster Universiti Kuala Lumpur Branch Campus Malaysian Institute of Chemical and BioEngineering Technology 78000 Alor Gajah Melaka Malaysia Student Development Section Branch Campus Malaysian France Institute Universiti Kuala Lumpur 43650 Bandar Baru Bangi Selangor Malaysia Aero Composite Cluster Universiti Kuala Lumpur Branch Campus Malaysian Institute of Aviation Technology Jalan Jenderam Hulu 43800 Dengkil Selangor Malaysia Polymer Science Program Division of Physical Science Faculty of Science Prince of Songkla University Hat-Yai Songkhla 90110 Thailand School of Industrial Technology Universiti Sains Malaysia Gelugor 11800 Penang Malaysia

Municipal wastewater treatment plant generates a large amount of sludge each year with a generation rate of up to 30.8 kg per population equivalent per year. These sewage sludge cakes contain an abundant amount of lipids that can be extracted, and their compound can be utilized in the production of value-added products. The separation of lipids subsequently reduces the volume of sludge to be managed and disposed of. Lipids can be separated using the conventional Soxhlet extractor, and the yield depends on process parameters such as solvent to sludge ratio, temperature, extraction time, and particle size. Among these parameters, particle size was scarcely studied while extraction time shows an insignificant effect on lipids yield. Therefore, this paper focuses on the impact of the particle size as effective extraction size as well as significant extraction parameters; temperature and sludge-to-solvent ratio on the lipids yield of extraction from the sewage sludge cake using methanol as solvent. Four sludge particle size ranges (x) were selected as the effective extraction size (x≤0.425mm, 0.4254.00mm), five solvents to sludge ratio (7, 8, 10, 13, and 20mL/g) and solvent temperature ranging from 60 to 90℃ were studied with the percentage of lipids yield as the response. The results show that the fine treatment region of x≤2.00mm resulted in higher lipids output compared to the coarse treatment region of x>2.00mm. The highest lipid of 9.70% was obtained at an effective size range of 1.00

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Using borax as a cross-linking agent in cellulose-based hydrogels

Using borax as a cross-linking agent in cellulose-based hydr...

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2019 International Conference on Composite Materials science and technology, ICCMST 2019

作者： Phoothong, Farin Boonmahitthisud, Anyaporn Tanpichai, Supachok Program of Petrochemical and Polymer Science Faculty of Science Chulalongkorn University Bangkok10330 Thailand Department of Materials Science Faculty of Science Chulalongkorn University Bangkok10330 Thailand Green Materials for Industrial Application Research Unit Faculty of Science Chulalongkorn University Bangkok10330 Thailand Learning Institute King Mongkut's University of Technology Thonburi Bangkok10140 Thailand

In this research, the cellulose-based hydrogels were obtained from the water hyacinth fibers (WHFs) with aids of borax as a chemical cross-linker. The chemical treatment on WHFs, confirmed by Fourier transform infrared (FT-IR) analysis and thermogravimetric analysis (TGA), exhibited the reduction of hemicellulose and lignin. The treated cellulose fibers were dissolved in the mixed solution of NaOH/urea prior to mixing with borax at the cellulose/borax weight ratio of 1/0, 1/0.5 and 1/1 to prepare cellulose-based hydrogels. The effect of borax contents on the properties of cellulose-based hydrogels was investigated. The results showed that the swelling ratio and equilibrium water content of the obtained hydrogels were similar with increasing a borax content. © 2019 Published under licence by IOP Publishing Ltd.

关键词： Sodium borate

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Development of green materials from ENR-25/PHBV blends: Curing characteristics and mechanical performance

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Journal of Physics: Conference Series 2022年第1期2175卷 012026页

作者： N Tomano O Boondamnoen C Aumnate P Potiyaraj Program in Petrochemistry and Polymer Science Faculty of Science Chulalongkorn University Bangkok 10330 Thailand Department of Materials Science Faculty of Science Chulalongkorn University Bangkok 10330 Thailand Center of Excellence on Petrochemical and Materials Technology Chulalongkorn University Bangkok 10330 Thailand Metallurgy and Materials Science Research Institute Chulalongkorn University Soi Chula 12 Phayathai Rd. Bangkok 10330 Thailand

The objective of this work was to develop green materials from epoxidized natural rubber (25% epoxidation), (ENR-25), poly(3-hydroxybutyrate-co-3-hydroxyvalerate), (PHBV), and polybutadiene adducted with maleic anhydride, (PB-g-MA) as compatibilizer. The ENR-25/PHBV blends were prepared at the ratio of 100/0, 90/10, and 80/20 with 0 and 10 %wt. PB-g-MA. The blends were prepared using an internal mixer, where PHBV was first melted at a temperature of 175 °C before mixing with ENR-25 and the incorporation of a compatibilizer. The mixing of ENR-25 and PHBV was continued at a temperature of 175 °C and mixing speed of 50 rpm until it reaches the complete blending time. All ENR-25/PHBV blends were then mixed with curing agents in an internal mixer at a temperature of 50 °C. The cure characteristics were determined using a moving die rheometer (MDR). Then vulcanization proceeded in a compression molding machine. The result shows that the addition of PHBV enhanced the modulus of ENR-25 for every blend ratio with and without compatibilizer owing to the mechanical properties of PHBV. Significantly, the PB-g-MA compatibilizer successfully improved the interface adhesion between ENR-25 and PHBV and the decrease in phase size was clearly seen in the SEM images.

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Viricidal Potential of Plasmonic and Metal Oxide Nanostructures: A Review

Viricidal Potential of Plasmonic and Metal Oxide Nanostructu...

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International Conference on Nanomaterials: Application & Properties (NAP)

作者： Marco Laurence M. Budlayan Jonathan N. Patricio Susan D. Arco Rey Y. Capangpangan Materials Science and Polymer Chemistry Laboratory Caraga State University Butuan City Philippines Ateneo de Manila University Quezon City Philippines Synthetic Organic Chemistry Laboratory Institute of Chemistry Natural Sciences Research Institute Quezon City Philippines Materials Science and Engineering Program College of Science University of the Philippines Diliman Quezon City Philippines Materials Science and Polymer Chemistry Laboratory Center for Nanoscience and Technology Research and Entrepreneurship Caraga State University Butuan City Philippines

ISBN: (数字)9781728185064

ISBN: (纸本)9781728185071

Viral diseases resulting to global pandemics occurring through the years have extremely affected the human population and global economies. With the rise of novel pathogenic viruses and resistance of the known ones to conventional drugs and medications, exploration of new materials with antiviral properties has become an expanding interest notjust in the field of biomedicine but also in materials science, particularly in nanotechnology. The unique physicochemical properties of nanostructures derived from gold and silver, and metal oxides have attracted considerable attention as novel antiviral nanomaterials. In this paper, we review the antiviral potential of plasmonic gold and silver, and metal oxide nanostructures against known human pathogenic viruses such as herpes, hepatitis, dengue, influenza, measles, human immunodeficiency virus, transmissible gastroenteritis virus and other viruses. Experimental investigations revealed the promising potential of both plasmonic and metal oxide nanostructures as antiviral agents. The mechanisms of antiviral action were found to vary for different nanomaterials and its target virus while some mechanisms remained unclear. The promising yet undeterministic antiviral potential of these nanomaterials paved a more interesting platform for further research and biomedical exploration.

关键词： Nanoparticles Silver Viruses (medical) Nanostructures Gold Nanomaterials Metals

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Cobalt copper alloys encapsulated by MOS2/N-doped graphene nano-heterostructures for orr application 22

Cobalt copper alloys encapsulated by MOS2/N-doped graphene n...

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22nd International Conference on Composite Materials, ICCM 2019

作者： Nguyen, D.C. Tran, D.T. Lee, Y.S. Kim, N.H. Lee, J.H. Advanced Materials Institute for BIN Convergence Technology BK21 Plus Global Program Department of BIN Convergence Technology Chonbuk National University Jeonju Jeonbuk54896 Korea Republic of Carbon Composite Research Center Department of Polymer-Nano Science and Technology Chonbuk National University Jeonju Jeonbuk54896 Korea Republic of

In this work, a hybrid containing cobalt-copper alloys encapsulated 2D-molybdenum disulfide/nitrogen-doped graphene (CuCo@2D-MoS2/N-Gr) is synthesized by a simple thermal treatment and investigated as a catalyst for oxygen reduction reaction (ORR) in alkaline solution. Benefiting from the large electrochemical surface area of 2D-MoS2 and Gr, the highly electrical conductivity of Gr, good synergetic effects between Cu and Co, good contact between MoS2 and N-Gr, and N-doing effect, the resulting CuCo@2D-MoS2/N-Gr hybrid exhibits high catalytic performance for ORR with positive onset (0.96 V), high current density (-6 ***-2), superior stability, and good methanol tolerance compared to the commercial Pt/C catalyst. The CuCo@2D-MoS2/N-Gr hybrid is expected as a promising catalyst material for fuel cell applications. © 2019 International Committee on Composite Materials. All rights reserved.

关键词： Electrocatalysts

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Strong and Ultra-tough Ionic Hydrogel Based on Hyperbranched Macro-Cross-linker: Influence of Topological Structure on Properties

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Angewandte Chemie 2023年第42期135卷

作者： Yu Jiang Dezhi Zhan Meng Zhang Ying Zhu Huiqing Zhong Yangfei Wu Qinwen Tan Xinhua Dong Daohong Zhang Nikos Hadjichristidis Key Laboratory of Catalysis and Energy Materials Chemistry of Ministry of Education & Hubei Key Laboratory of Catalysis and Materials Science Hubei R&D Center of Hyperbranched Polymers Synthesis and Applications South-Central Minzu University Wuhan 430074 P. R. China Polymer Synthesis Laboratory Chemical Science Program KAUST Catalysis Center Physical Sciences and Engineering Division King Abdullah University of Science and Technology (KAUST) Thuwal 23955 Kingdom of Saudi Arabia

The application of hydrogels often suffers from their inherent limitation of poor mechanical properties. Here, a carboxyl-functionalized and acryloyl-terminated hyperbranched polycaprolactone (PCL) was synthesized and used as a macro-cross-linker to fabricate a super strong and ultra-tough ionic hydrogel. The terminal acryloyl groups of hyperbranched PCL are chemically incorporated into the network to form covalent cross-links, which contribute to robust networks. Meanwhile, the hydrophobic domains formed by the spontaneous aggregation of PCL chains and coordination bonds between Fe 3+ and COO − groups serve as dynamic non-covalent cross-links, which enhance the energy dissipation ability. Especially, the influence of the hyperbranched topological structure of PCL on hydrogel properties has been well investigated, exhibiting superior strengthening and toughening effects compared to the linear one. Moreover, the hyperbranched PCL cross-linker also endowed the ionic hydrogel with higher sensitivity than the linear one when used as a strain sensor. As a result, this well-designed ionic hydrogel possesses high mechanical strength, superior toughness, and well ionic conductivity, exhibiting potential applications in the field of flexible strain sensors.

关键词： Hydrogels Hyperbranched Cross-Linkers Polycaprolactone Strain Sensors Super Toughness

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Detecting mercury ions in water using a low-cost colorimetric sensor derived from immobilized silver nanoparticles on a paper substrate

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Environmental Nanotechnology, Monitoring and Management 2022年 18卷

作者： Budlayan, Marco Laurence Dalagan, Jhonnybert Lagare-Oracion, Jeanne Phyre Patricio, Jonathan Arco, Susan Latayada, Felmer Vales, Temmy Baje, Benito Alguno, Arnold Capangpangan, Rey Department of Physics School of Science and Engineering Ateneo de Manila University Quezon City 1108 Philippines Department of Chemistry Caraga State University Butuan City 8600 Philippines Materials Science and Polymer Chemistry Laboratory Caraga State University Butuan City 8600 Philippines Materials Science Engineering Program College of Science University of the Philippines Diliman Quezon City 1101 Philippines Synthetic Organic Chemistry Laboratory Institute of Chemistry University of the Philippines Diliman Quezon City 1101 Philippines Physics Unit Philippine Science High School Central Visayas Campus Talaytay Argao 6021 Cebu Philippines Department of Physics Mindanao State University-Iligan Institute of Technology Tibanga Iligan City 9200 Philippines Department of Physical Sciences and Mathematics College of Marine and Allied Sciences Mindanao State University at Naawan Poblacion Naawan 9023 Misamis Oriental Philippines

The exceptional and specific reactivity of mercury ions (Hg2+) toward plasmonic silver nanoparticles (AgNPs) in aqueous media has motivated the need to develop innovative, low-cost, portable, and robust sensors to hel... 详细信息

The exceptional and specific reactivity of mercury ions (Hg²⁺) toward plasmonic silver nanoparticles (AgNPs) in aqueous media has motivated the need to develop innovative, low-cost, portable, and robust sensors to help address the detrimental effects of heavy metal contamination particularly in rural communities. In this paper, we present the plasmonic and colorimetric sensing of Hg²⁺ using a paper-based sensing material derived from thiamine-functionalized (ThAgNPs) that were immobilized on a commercial filter paper. Plasmonic AgNPs with a surface plasmon resonance peak at 420 nm and a size of about 21.3 nm were synthesized by a chemical reduction technique. Fourier transform infrared spectroscopy revealed the characteristic functional groups of thiamine in the spectra of AgNPs, thereby confirming the functionalization of AgNPs. The successful integration of ThAgNPs onto the Whatman filter paper (WFP) matrix was confirmed by the UV–vis and SEM-EDX results. An evident color change from yellowish to white was manifested by the fabricated WFP-ThAgNP sensor in the presence of Hg²⁺ with an appreciable detection of up to 0.5 µM using the naked eye. The colorimetric response of the sensor was also found to be selective towards Hg²⁺ after testing with different metal ions. Moreover, the response was consistent for tap, and creek water samples spiked with Hg²⁺. The results of this work provide a promising baseline technology for the development of an affordable, fast, portable, and reliable sensor that can be used for on-site detection and monitoring of Hg²⁺ levels in the water. © 2022 Elsevier B.V.

关键词： Colorimetric sensor Mercury detection Paper-based device Silver nanoparticle Thiamine

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Correction: Influence of shape on crystal structure and optical properties of heterocyclic conjugated molecules

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Journal of Materials Chemistry C 2025年第10期13卷 5385-5385页

作者： Elisa Guzmán Yu Yan Peter Müller Justin Amengual Chung-Hao Liu Mu-Ping Nieh Department of Chemistry Tufts University 62 Talbot Ave Medford MA 02155 USA Department of Chemistry Massachusetts Institute of Technology Cambridge MA 02139 USA Polymer Program Institute of Materials Science University of Connecticut 25 King Hill Road Storrs CT 06269-3136 USA Department of Chemical & Biomolecular Engineering University of Connecticut – Storrs 97 North Eagleville Road Unit 3136 Storrs CT-06269-3136 USA

Correction for ‘Influence of shape on crystal structure and optical properties of heterocyclic conjugated molecules’ by Elisa Guzmán et al., J. Mater. Chem. C, 2025, 13, 954–962, https://***/10.1039/D4TC03509G.

Correction for ‘Influence of shape on crystal structure and optical properties of heterocyclic conjugated molecules’ by Elisa Guzmán et al., J. Mater. Chem. C, 2025, 13, 954–962, https://***/10.1039/D4TC03509G.

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Author Correction: Intrinsic efficiency limits in low-bandgap non-fullerene acceptor organic solar cells

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Nature materials 2022年第3期21卷 378页

作者： Safakath Karuthedath Julien Gorenflot Yuliar Firdaus Neha Chaturvedi Catherine S P De Castro George T Harrison Jafar I Khan Anastasia Markina Ahmed H Balawi Top Archie Dela Peña Wenlan Liu Ru-Ze Liang Anirudh Sharma Sri H K Paleti Weimin Zhang Yuanbao Lin Erkki Alarousu Sergei Lopatin Dalaver H Anjum Pierre M Beaujuge Stefaan De Wolf Iain McCulloch Thomas D Anthopoulos Derya Baran Denis Andrienko Frédéric Laquai KAUST Solar Center Physical Sciences and Engineering Division (PSE) Materials Science and Engineering Program (MSE) King Abdullah University of Science and Technology (KAUST) Thuwal Kingdom of Saudi Arabia. Max Planck Institute for Polymer Research Mainz Germany. Imaging and Characterization Core Laboratory King Abdullah University of Science and Technology (KAUST) Thuwal Kingdom of Saudi Arabia. Department of Chemistry University of Oxford Oxford UK. Max Planck Institute for Polymer Research Mainz Germany. denis.andrienko@mpip-mainz.mpg. KAUST Solar Center Physical Sciences and Engineering Division (PSE) Materials Science and Engineering Program (MSE) King Abdullah University of Science and Technology (KAUST) Thuwal Kingdom of Saudi Arabia. frederic.laquai@kaust.edu.sa.

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Structural modification of carbon black for improving the dielectric performance of epoxy based composites

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Advanced Industrial and Engineering polymer Research 2018年第1期1卷 111-117页

作者： Wang, Xin Li, Zewei Chen, Zhiwu Zeng, Lanying Sun, Luyi School of Materials Science and Engineering South China University of Technology Guangzhou China Polymer Program Institute of Materials Science and Department of Chemical & Biomolecular Engineering University of Connecticut Storrs CT United States

To explore a feasible strategy for improving the dielectric properties of carbon black (CB)/epoxy composites, CB@TiO2 core-shell particles and CB-SiO2 hybrid particles were prepared and incorporated into epoxy. The microstructures of CB, CB@TiO2, and CB-SiO2 particles, as well as the dielectric properties of their epoxy-based composites were investigated. The results showed that the composites containing CB-SiO2 hybrid particles possessed a higher dielectric constant than the ones containing pristine CB. The dielectric constant of the composite with 20.0 vol% CB-SiO2 reached 52.68 (1 kHz), which was ca. 4 times greater than that of the one containing 20.0 vol% pristine CB. Meanwhile, the composites containing CB@TiO2 core-shell particles exhibited suppressed values of dielectric loss. The permittivity of the composite with 20.0 vol% CB@TiO2 reached 19.52 (1 kHz), while its dielectric loss remained low (0.047 at 1 kHz). These results indicated that the dielectric properties of epoxy composites could be enhanced with the introduction of modified fillers. © 2018 Kingfa SCI. & TECH. CO., LTD.

关键词： Carbon black

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