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Characterization of Nanocomposite Membrane Based Bacterial Cellulose Made of Pineapple Waste Reinforced by Graphite Nanoplatelets

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Journal of Renewable materials 2022年第9期10卷 2465-2475页

作者： Heru Suryanto Bili Darnanto Susilo Jibril Maulana Aminnudin Uun Yanuhar Surjani Wonorahardjo Husni Wahyu Wijaya Abu Saad Ansari Center of Excellence for Cellulose Composite(CECCom) Department of Mechanical EngineeringUniversitas Negeri MalangMalang65145Indonesia Centre of Advanced Material for Renewable Energy(CAMRY) Universitas Negeri MalangMalang65145Indonesia Master Program of Mechanical Engineering Faculty of EngineeringUniversitas Negeri MalangMalang65145Indonesia Department of Aquatic Resources Management Faculty of Fisheries and Marine SciencesBrawijaya UniversityMalang65145Indonesia Department of Chemistry Faculty of Mathematics and Natural SciencesUniversitas Negeri MalangMalang65145Indonesia Department of Materials Science&Engineering Incheon National UniversityIncheon464-742South Korea

Waste is the main problem for the *** waste for various useful applications has a benefit for the *** work has been studied for handling pineapple peel waste to make composite film bacterial cellulose nanocomposite membrane(BCNM)with addition graphite nanoplatelet(GNP).The concentration of GNP in the membrane influence the membrane *** bacterial cellulose(BC)pellicle was synthesized by using media from pineapple peel waste *** pellicle is cleaned with water and NaOH solution to be free from *** is synthesized through the mechanical disintegration *** results of disintegration using high pressure homogenizer at 150 bar and five ***/GNP is synthesized with varying addition of GNP of 2.5,5.0,10 and 100 wt%of dry bacterial nanocellulose(BNC).The BC and GNP solution were dried in an oven for 14 h at 80℃.BCNM morphology was observed using *** is dispersed and distributed in the BC matrix as *** analysis shows many peaks of BNC less pronounced with increasing of *** higher concentration of GNP,the rougher of *** optimum tensile strength of BCNM was achieved after addition GNP of 2.5 wt%.

关键词： Bacterial nanocellulose graphite nanoplatelet membrane nanocomposite pineapple waste

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Thermogravimetric study on the thermal characteristics of tetraselmis chuii microalgae pyrolysis in the presence of titanium dioxide

Thermogravimetric study on the thermal characteristics of te...

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Annual International Conference on Renewable Energy, ICORE 2019

作者： Sukarni, Sukarni Widiono, Aloon Eko Wulandari, Retno Prasetiyo, Ardianto Puspitasari, Poppy Department of Mechanical Engineering State University of Malang Semarang Street 5 Malang65145 Indonesia Master Program of Mechanical Engineering Graduate School State University of Malang Semarang Street 5 MalangEast Java65145 Indonesia Centre of Advanced Materials for Renewable Energy State University of Malang Semarang Street 5 Malang65145 Indonesia

ISBN: (纸本)9783035716276

This study aims to analyze the thermal characteristics of Tetraselmis chuii (***) microalgae in the presence of TiO2 (Titanium dioxide). The experiment was carried out on thermal analyzer equipment under inert condition. The blended sample has a mass ratio of microalgae and TiO2 that was 10:0.03 (wt%). The results of the thermal analysis show that the addition of TiO2 can change the temperature characteristics during the reaction process. The Coats-Redfern method is applied to calculate activation energy (Ea) resulted in the value of the blended fuel in the second stage that was 56.9 kJ/mol lower than that of pure microalgae that was 70.68 kJ/mol and conversely in the third stage the value of activation energy for blended fuel was 264.57 kJ/mol higher than pure microalgae that was 223.25 kJ/mol. Overall results pointed out that TiO2 had a significant impact on the thermal characteristic of Tetraselmis chuii during the pyrolysis process. © 2020 Trans Tech Publications Ltd, Switzerland.

关键词： Titanium dioxide

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Study on synthesis and structural characterization of ZnO-doped g-C3N4materials for treatment of ciprofloxacin antibiotic in water 7

Study on synthesis and structural characterization of ZnO-do...

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7th International Scientific Conference on Applying New Technology in Green Buildings, ATiGB 2022

作者： Ha, Tran Thi Viet Viet, Nguyen Minh Tri, Nguyen Le Minh VNU Vietnam Japan University Master's Program in Environmental Engineering Faculty of Advanced Technologies and Engineering Hanoi Viet Nam VNU University of Science Faculty of Chemistry VNU Key Laboratory of Advanced Material for Green Growth Hanoi Viet Nam Advanced Institute of Materials Science Ton Duc Thang University Laboratory of Advanced Materials Chemistry Faculty of Applied Sciences Ho Chi Minh city Viet Nam

ISBN: (数字)9781665472852

ISBN: (纸本)9781665472852

Recently, the overuse and misuse of antibiotics are key factors leading to many negative problems to human and environment. Therefore, the removal for the antibiotics is very necessary, and photocatalysis is a highly efficient and environmentally friendly treatment method. Graphite carbon nitride (\mathrm{g}-\mathrm{C}_{3}\mathrm{N}_{4}) is an organic semiconductor, researched to create a 'new-generation' photocatalytic material system by hybridization with semiconductors such as TiO2 and ZnO, which offers potential energy in the decomposition of organic compounds using the energy of visible light. In this study, ZnO/g-C3N4 materials were synthesized and characterized by advanced techniques, then apply for ciprofloxacin antibiotic (CIP) treatment. The CIP degradation efficiency of the material reached 84.36% and after three times the material was regenerated, ZnO/g-C3N4 composite still showed excellent degradation ability. Therefore, ZnO/g-C3N4 materials can be applied in environmental remediation and many other fields. © 2022 IEEE.

关键词： Antibiotics

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Effect of alkalization on the bacterial cellulose film structure produced using the pineapple waste

Effect of alkalization on the bacterial cellulose film struc...

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Annual International Conference on Renewable Energy, ICORE 2019

作者： Muhajir, Muhamad Suryanto, Heru Larasati, Aisyah Master Program of Mechanical Engineering Engineering Faculty Universitas Negeri Malang Jl. Semarang 5 MalangEast Java65145 Indonesia Centre of Advanced Materials for Renewable Energy Universitas Negeri Malang Jl. Semarang 5 MalangEast Java65140 Indonesia Engineering Faculty Universitas Negeri Malang Jl. Semarang 5 MalangEast Java65145 Indonesia

ISBN: (纸本)9783035716276

Bacterial cellulose is natural polymers materials produced by Acetobacter xylinum with attractive physical properties because they are ordinary and uniform in structure. An alternative of cellulose from renewable source with more effective results to produce bacterial cellulose fibers. For this reason, the purpose of this paper is to show the effect of alkalization process on the bacterial cellulose film structure. The methods were the synthesis of bacterial cellulose using the extracts of pineapple waste. The pellicle product was treated using in the concentration of 0%, 1%, 5% and 10% then bacterial fiber films obtained from drying process of treated pellicle. Furthermore, the XRD and FTIR of bacterial cellulose were observed. The results of the structure of bacterial cellulose film was changed after a process in a high concentration of NaOH. © 2020 Trans Tech Publications Ltd, Switzerland.

关键词： Cellulose films

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Fabrication and electroluminescent property of OLED with boron-complex 3

Fabrication and electroluminescent property of OLED with bor...

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3rd International Conference on Electron Device and Mechanical engineering, ICEDME 2020

作者： Lin, Yu-Feng Yeh, Anchi Chen, Sheng-Lee Fanny Lin, M.-F. ChungYuan Christiant University Department of Chemical and Materials Engineering Taoyuan Taiwan Chengshiu University Department of Cosmetic and Fashion Styling Kaohsiung Taiwan Hsing Wu University of Science and Technology Center of General Education Taoyuan Taiwan Long Island University at CW Post Master Program of Education New York United States

ISBN: (纸本)9781728181455

A novel luminescence boron compound, [2-(4, 5- diphenyl-1-imidazole-2-yl) pyridine] (DPIP-BPh2), has been synthesized by the reaction of pyridine-imidazole- based ligand. The decomposed temperature of DPIP-BPh2 is high than 200°C by thermogravimetric analyzer (TGA). For the three-layer organic light-emitting diodes (OLED) with the structure ITO/NPB/DPIP-BPh2/Alq3/Mg-Ag, an emission band centering at 490 nm with the maximum brightness of 1300 cd/m2 was observed, indicating a perfect blue OLED (CIE= 0.22, 0.36). DPIP-BPh2 forms a new family of organometallic emitting materials which which may bring benefits to people in practical applications. © 2020 IEEE.

关键词： Pyridine

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Environmentally-friendly alkaline ionized water pretreatment and hydrolysis of macroalga via microwave-assisted heating to improve monosaccharide yield for bioethanol production

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Process Safety and Environmental Protection 2024年 189卷 702-713页

作者： Chen, Wei-Hsin Liu, Li-Xuan Khoo, Kuan Shiong Sheen, Herng-Kuang Kwon, Eilhann E. Saravanakumar, Ayyadurai Chang, Jo-Shu Department of Aeronautics and Astronautics National Cheng Kung University Tainan701 Taiwan Research Center for Smart Sustainable Circular Economy Tunghai University Taichung407 Taiwan Department of Mechanical Engineering National Chin-Yi University of Technology Taichung411 Taiwan International Master Degree Program on Energy National Cheng Kung University Tainan701 Taiwan Department of Chemical Engineering and Materials Science Yuan Ze University Taoyuan Taiwan Sugar Business Division Taiwan Sugar Corporation Taiwan701 Taiwan Department of Earth Resources and Environmental Engineering Hanyang University Seoul04763 Korea Republic of Directorate of Research SRM Institute of Science and Technology Chengalpattu District Tamil Nadu Kattankulathur603203 India Department of Chemical Engineering and Materials Science College of Engineering Tunghai University Taichung Taiwan Department of Chemical Engineering National Cheng Kung University Tainan Taiwan

This study synthesizes three sequential steps: pretreatment, acid hydrolysis, and enzyme hydrolysis for bioethanol and hydrochar production from macroalga Gracilaria. The Taguchi method is employed separately in each step to optimize relevant operating factors, aiming to maximize the monosaccharide yield. During pretreatment, environmentally friendly alkaline ionized water is utilized as it does not contain chemical additives. Afterward, microwave-assisted hydrolysis is adopted to enhance the monosaccharide yield of the macroalga for bioenergy production. The results show that the total sugar of Gracilaria undergoing acid hydrolysis alone is 28.72 g‧L−1. The total sugar content after alkaline pretreatment followed by acid hydrolysis is 32.64 g‧L−1, and it increases to 34.76 g‧L−1 after adding enzymes. Meanwhile, the higher heating value of Gracilaria increases from 10.884 MJ‧kg−1 to 12.620 MJ‧kg−1 after undergoing alkaline pretreatment. After the acid and enzyme hydrolysis processes, it increases to 15.164 MJ‧kg−1. The solid biofuel's calorific value increases by 39 % from the three-stage processes. The liquid product combined with Saccharomyces cerevisiae can produce bioethanol, while the produced hydrochar can be used as a solid fuel. This research promotes the development of macroalgal biomass for energy and environmental applications, thereby advancing the circular bioeconomy. © 2024 The Institution of Chemical Engineers

关键词： Ethanol

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A PRACTICAL APPLICATION OF MULTIPHASE TRANSPORT-THEORY TO GROUNDWATER CONTAMINATION PROBLEMS

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GROUND WATER MONITORING AND REMEDIATION 1987年第1期7卷 84-92页

作者： HINCHEE, RE REISINGER, HJ Robert E. Hinchee Ph.D. P.E. is manager of Western Regional Engineering Operations for EA Engineering Science and Technology Inc. (41 Lafayette Circle Lafayette CA 94549). He holds a doctorate in civil and environmental engineering from Utah State University is a registered professional engineer and is a master's level certified hazardous materials manager. He is involved in subsurface hydrocarbon behavior research and practical assessment and remediation of contaminated sites. His experience includes investigation and design of remediation at more than 50 subsurface petroleum spill sites. H. James Reisinger II CHMM is a vice president of EA Engineering Science and Technology Inc. (Hunt Valley/Loveton Center 15 Loveton Circle Sparks MD 21152) and is responsible for all analytical services. He holds a master's degree from Millersville State University and is a master's level certified hazardous materials manager. He has developed sampling and analytical programs and provided analysis of the resulting data for more than 100 contaminated sites. He is currently responsible for a major laboratory that is in the EPA CLP program and certified in eight states.

Hydrocarbon transport in the subsurface environment occurs in several phases, chiefly the non-aqueous phase liquid (NAPL), dissolved and vapor phases. Mechanisms that influence transport include the physicochemical properties of the specific compounds present (density, vapor pressure, viscosity, hydrophobicity) and the physical and chemical properties of the subsurface environment, including geology, aquifer minerology and ground water hydrology. Hydrocarbon liquids are typically complex mixtures composed of numerous compounds, each with its own individual physicochemical and, therefore, transport properties. Examination of chemical data can provide insights into the transport mechanisms operating at a site: Ground water transport results in relative enrichment by more soluble, less hydrophobic hydrocarbon compounds as a function of distance from a spill; vapor phase transport typically results in relative enrichment in more volatile hydrocarbon *** sites at which subsurface fuel spills resulted in ground water contamination will illustrate the use of transport mechanism theory. At Site 1 a subsurface spill resulted in a NAPL plume approximately 150m (500 feet) and a dissolved hydrocarbon plume resulting from ground water transport of dissolved hydrocarbon approximately 350m (1150 feet) hydraulically downgradient of the source. At Site 2 there was a sudden subsurface fuel spill; ground water pumping with hydrocarbon recovery was begun within a week of spillage. Vapor phase transport resulted in contaminated ground water hydraulically upgradient of the source. In addition, there was cross-contamination at Site 2, probably as the result of contaminated water level gauging equipment, but the chemical characteristics of this contamination were sufficiently obvious to permit its identification. An understanding of transport mechanisms is instrumental in contamination assessment source identification, contaminant fate prediction and design of an appropriate reme

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engineering H2O2 Self-Supplying Platform for Xdynamic Therapies via Ru-Cu Peroxide Nanocarrier: Tumor Microenvironment-Mediated Synergistic Therapy

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ACS Applied materials and Interfaces 2024年第19期16卷 24172-24190页

作者： Dirersa, Worku Batu Kan, Tzu-Chun Chang, Jungshan Getachew, Girum Ochirbat, Sonjid Kizhepat, Shamsa Wibrianto, Aswandi Rasal, Akash Chen, Hung-An Ghule, Anil Vithal Chou, Tzung-Han Chang, Jia-Yaw Department of Chemical Engineering National Taiwan University of Science and Technology Taipei106335 Taiwan Graduate Institute of Medical Sciences College of Medicine Taipei Medical University Taipei11031 Taiwan International Master/Ph.D. Program in Medicine College of Medicine Taipei Medical University Taipei11031 Taiwan International Ph.D. Program for Cell Therapy and Regeneration Medicine College of Medicine Taipei Medical University Taipei11031 Taiwan Green Nanotechnology Laboratory Department of Chemistry Shivaji University Kolhapur416004 India Department of Chemical and Materials Engineering National Yunlin University of Science and Technology Yunlin64002 Taiwan

Of the most common, hypoxia, overexpressed glutathione (GSH), and insufficient H2O2 concentration in the tumor microenvironment (TME) are the main barriers to the advancment of reactive oxygen species (ROS) mediated Xdynamic therapies (X = photo, chemodynamic, chemo). Maximizing Fenton catalytic efficiency is crucial in chemodynamic therapy (CDT), yet endogenous H2O2 levels are not sufficient to attain better anticancer efficacy. Specifically, there is a need to amplify Fenton reactivity within tumors, leveraging the unique attributes of the TME. Herein, for the first time, we design RuxCu1-xO2-Ce6/CPT (RCpCCPT) anticancer nanoagent for TME-mediated synergistic therapy based on heterogeneous Ru-Cu peroxide nanodots (RuxCu1-xO2 NDs) and chlorine e6 (Ce6), loaded with ROS-responsive thioketal (TK) linked-camptothecin (CPT). The Ru-Cu peroxide NDs (RCp NDs, x = 0.50) possess the highest oxygen vacancy (OV) density, which grants them the potential to form massive Lewis’s acid sites for peroxide adsorption, while the dispersibility and targetability of the NDs were improved via surface modification using hyaluronic acid (HA). In TME, RCpCCPT degrades, releasing H2O2, Ru2+/3+, and Cu+/2+ ions, which cooperatively facilitate hydroxyl radical (•OH) formation and deactivate antioxidant GSH enzymes through a cocatalytic loop, resulting in excellent tumor therapeutic efficacy. Furthermore, when combined with laser treatment, RCpCCPT produces singlet oxygen (1O2) for PDT, which induces cell apoptosis at tumor sites. Following ROS generation, the TK linkage is disrupted, releasing up to 92% of the CPT within 48 h. In vitro investigations showed that laser-treated RCpCCPT caused 81.5% cell death from PDT/CDT and chemotherapy (CT). RCpCCPT in cancer cells produces red-blue emission in images of cells taking them in, which allows for fluorescence image-guided Xdynamic treatment. The overall results show that RCp NDs and RCpCCPT are more biocompatible and have excellent Xdynamic the

关键词： Oxidation

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Compact And Scalable Large Vortex Array Generation Using Azocarbazole Polymer And Digital Hologram Printing Technique

Research Square

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Research Square 2021年

作者： Jessie, Jackin Boaz Masaki, Shirai Honoka, Haginaka Kinashi, Kenji Tsutsumi, Naoto Sakai, Wataru Materials Innovation Laboratory Kyoto Institute of Technology Kyoto Japan Master’s Programs of Materials Chemistry Kyoto Institute of Technology Kyoto Japan Bachelor’s Program of Materials Chemistry Kyoto Institute of Technology Kyoto Japan Faculty of Materials Science and Engineering Kyoto Institute of Technology Kyoto Japan

An integrated device capable of generating large number of multiplexed optical vortex beams with arbitrary topological charges is considered as one of the crucial requirement for driving information photonics forward. Here we report a simple method for simultaneous generation of 100 multiplexed optical vortex beams from a polymer film of size 1mm2 and thickness of 30µm. This is achieved through a combination of computer generated holography, digital hologram printing and photoisomeric polymers. When the fabricated sample is illuminated with a collimated laser beam, a pre-determined vortex array with arbitrary topological charge is emitted. The polymer film easy to synthesise and exhibits good diffraction efficiency and long retention time. © 2021, CC BY.

关键词： Holograms

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An enhanced efficacy of antibacterial wound dressings impregnated with bacterial cellulose-based microencapsulated lime ( Citrus aurantiifolia ) essential oil

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Carbohydrate Polymer Technologies and Applications 2025年 10卷

作者： Euis Julaeha Irene Febbe Myrtha Karina Tatang Wahyudi Sarifah Nurjanah Pramesthi Reitza Navisya Vasall Nandang Permadi Jamaludin Al-Anshori Department of Chemistry Faculty of Mathematics and Natural Sciences Universitas Padjadjaran Jatinangor 45361 Indonesia Research Center for Environmental and Clean Technology National Research and Innovation Agency Cibinong Bogor 16911 Indonesia Research Center for Biomass and Bioproduct National Research and Innovation Agency Cibinong Bogor 16911 Indonesia Research Collaboration Center for Nanocellulose BRIN – Universitas Andalas Padang 25163 Indonesia Research Collaboration Center for Biomass and Biorefinery BRIN – Universitas Padjadjaran Jatinangor 45363 Indonesia Research Center for Advanced Materials National Research and Innovation Agency Tangerang Selatan 15310 Indonesia Department of Agriculture Engineering Faculty of Agricultural Industrial Technology Universitas Padjadjaran Jatinangor 45363 Indonesia Master’s Program in Biotechnology Graduate School Universitas Padjadjaran Bandung 40132 Indonesia Doctorate Program in Biotechnology Graduate School Universitas Padjadjaran Bandung 40132 Indonesia

Lime peel essential oil (LPO) exhibits promising antibacterial properties, yet its inherent instability limits its practical applications, necessitating effective encapsulation strategies. Microencapsulation provides protection and facilitates the controlled release of active compounds. This study developed LPO microcapsules via complex coacervation, employing gum arabic and gelatin as encapsulating agents for wound dressing applications. Process optimization identified optimal conditions at pH 4.25, 15 min stirring time, and 50 °C temperature. The microcapsules yielded 45.13 %, oil content 77.03 %, encapsulation efficiency 92.14 %, and a 44.94 % core release within 2 h, following the Avrami kinetic model ( n = 0.345). Morphological analysis revealed spherical microcapsules with an average diameter of 1.182 μm, effectively protecting LPO from thermal degradation. These microcapsules were subsequently immobilized onto bacterial cellulose produced from pineapple core fermentation using Komagataeibacter xylinus . The resulting material demonstrated potential as an antibacterial wound dressing, with inhibition zones of 11.51 mm against Staphylococcus aureus and 13.70 mm against Escherichia coli . This research presents an innovative approach to wound dressing development, integrating protective and antibacterial functions to prevent skin infection effectively.

关键词： Antibacterial Bacterial cellulose Complex coacervation C. aurantiifolia Microencapsulation

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