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Fire-retardant, anti-dripping, biodegradable and biobased polyurethane elastomers enabled by hydrogen-bonding with cellulose nanocrystals

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Nano Research 2024年第3期17卷 2186-2194页

作者： Yijiao Xue Tianchen Zhang Hong Peng Zhewen Ma Meng Zhang Mark Lynch Toan Dinh Zhezhe Zhou Yonghong Zhou Pingan Song Institute of Chemical Industry of Forest Products Chinese Academy of Forestry(CAF)Nanjing 210042China School of Chemical Engineering The University of QueenslandBrisbaneQld 4072Australia Department of Polymer Materials School of Materials Science and EngineeringTongji UniversityShanghai 201804China School of Agriculture and Environmental Science University of Southern QueenslandToowoombaQld 4300Australia Centre for Future Materials University of Southern QueenslandToowoombaQld 4300Australia

Thermoplastic polyurethane(PU)elastomers have attracted significant attention because of their many important industrial ***,the creation of fire-retardant and anti-dripping PU elastomers has remained a grant challenge due to the lack of crosslinking and weak interchain ***,we report a mechanically robust,biodegradable,fire-retardant,and anti-dripping biobased PU elastomer with excellent biodegradability using an abietic acid-based compound as hard segments and polycaprolactone diol(PCL)as soft segments,followed by physically crosslinking with cellulose nanocrystals(CNC)through dynamic *** resultant elastomer shows the balanced mechanical and fire-retardant properties,e.g.,a tensile strength and break strain of 9.1 MPa and 560%,a self-extinguishing ability(V-0 rating in UL-94 testing),and an anti-dripping ***,the as-developed PU can be completely degraded in 1.0 wt.%lipase solution at 37℃ in 60 days,arising from the catalytic and wicking effect of CNC on PU *** work provides an innovative and versatile strategy for constructing robust,fire-retardant,anti-dripping,and biodegradable PU elastomers,which hold great promise for practical applications in electronic and automobile sectors.

关键词： polyurethane elastomers cellulose nanocrystals fire retardancy anti-dripping biodegradation

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The Effect of Silica Concentration on the Absorption Properties of Silica-Based Ceramic Membrane 2

The Effect of Silica Concentration on the Absorption Propert...

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2nd International Conference on Physics and Applied Physics, ICP and AP 2023

作者： Surya, I. Nasution, K.S. Sembiring, A.M. Hayeemasae, N. Department of Chemical Engineering Universitas Sumatera Utara Medan Indonesia Department of Rubber Technology and Polymer Science Prince of Songkla University Pattani Thailand

Water pollution is currently an increasingly widespread environmental problem. Methylene blue is a synthetic dye used in the textile industry which pollutes the aquatic environment. The absorption of Methylene Blue textile dye which pollutes the environment uses silica precipitate as a filler in ceramic membranes with a clay matrix. Silica precipitate added to the ceramic membrane varies with a concentration of 0.3 %, 1.01 %, 1.68 %, 2.34 % and 2.99 %. The membrane will be characterized using Fourier Transform Infrared (FTIR) testing to determine the functional groups of the components it contains. Testing the absorption of methylene blue contaminant content from artificial wastewater using the UV-Vis Spectrophotometry test. The FTIR test carried out compared the functional groups of membrane samples before and after sintering. The results obtained from the FTIR test were that the membrane after sintering contained silica and some PEG, while the membrane before sintering contained other components such as PVA, PEG, water molecules and silica. The UV-Vis test carried out on the membrane gave results that the membrane was 0.3 %, 1.01 %, 1.68 %, 2.34 % and 2.99 % respectively has a removal efficiency of 58.0 %, 54.0 %, 59.3 %, 64.0 % and 66.4 %, where the best removal efficiency of methylene blue was on a membrane filled with 2.99 % of silica. Tests on the membrane showed that an increase in silica concentration was in line with an increase in the quality of the membrane's performance in rejecting methylene blue contaminants. © Published under licence by IOP Publishing Ltd.

关键词： Silica

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The porosity and morphology properties of ceramic membrane 2

The porosity and morphology properties of ceramic membrane

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2nd International Conference on Physics and Applied Physics, ICP and AP 2023

作者： Surya, I. Sembiring, A.M. Nasution, K.S. Hayeemasae, N. Department of Chemical Engineering Universitas Sumatera Utara Medan Indonesia Department of Rubber Technology and Polymer Science Prince of Songkla University Pattani Thailand

The success of ceramic membranes as solute separation and filtration makes membrane technology widely used because it has high effectiveness and efficiency as a solute separator and filtration. The solute separation and filtration performances of typical ceramic membranes depend on the porosity properties of the ceramic membrane itself. Membrane porosity indicates the number of porous areas in the membrane. Precipitated silica as filler was added into the ceramic membrane at 0.30 %, 1.01 %, 1.68 %, 2.34 %, and 2.99 % per hundred masses of the membrane. It was revealed that silica acting as a membrane filler increased the porosity of the ceramic membrane. This was confirmed with the SEM (Scanning Electron Microscopy) test and Origin Software. From the test results the highest porosity value is at 2.99 % per hundred masses of membrane. © Published under licence by IOP Publishing Ltd.

关键词： Ceramic membranes

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Recent developments in artificial spider silk and functional gel fibers

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SmartMat 2023年第6期4卷 31-55页

作者： Abdul Qadeer Khan Muhammad Shafiq Jiatian Li Kaiqing Yu Zunfeng Liu Xiang Zhou Meifang Zhu Department of Science China Pharmaceutical UniversityNanjingChina State Key Laboratory of Medicinal Chemical Biology Key Laboratory of Functional Polymer MaterialsSmart Sensing Interdisciplinary Science CenterCollege of ChemistryNankai UniversityTianjinChina Department of Chemical Engineering Faculty of EngineeringGraduate SchoolKyushu UniversityFukuoka-shiJapan Department of Biotechnology University of Central Punjab(UCP)LahorePakistan State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringDonghua UniversityShanghaiChina

It is highly desirable to develop fiber materials with high strength and toughness while increasing fiber strength always results in a decrease in *** silk is a natural fiber material with an excellent combination of high strength and toughness,which is produced from the spinning dope solution by gelation and drawing spinning *** encourages people to prepare artificial fibers by mimicking the material,structure,and spinning of natural spider *** this review,we first summarized the preparation of artificial spider silk prepared via such a gelation process from different types of materials,including nonrecombinant proteins,recombinant proteins,polypeptides,synthetic polymers,and polymer *** addition,different spinning approaches for spinning artificial spider silk are also *** the third section,some novel application scenarios of the artificial spider silk were summarized,such as artificial muscles,sensing,and smart fibers.

关键词： biomimetic fiber spinning hydrogel fibers polymer composites polymer fibers protein fibers strong and tough fibers

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PDA-BPs integrated mussel-inspired multifunctional hydrogel coating on PPENK implants for anti-tumor therapy,antibacterial infection and bone regeneration

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Bioactive Materials 2023年第9期27卷 546-559页

作者： Yizheng Li Chengde Liu Xitong Cheng Jinyan Wang Yue Pan Cheng Liu Shouhai Zhang Xigao Jian State Key Laboratory of Fine Chemicals Frontier Science Center for Smart MaterialsSchool of Chemical EngineeringDalian University of TechnologyDalian116024China Department of Polymer Science and Engineering Dalian University of TechnologyDalian116024China State Key Laboratory of Fine Chemicals Department of Pharmaceutical SciencesSchool of Chemical EngineeringDalian University of TechnologyDalian116024China Liaoning Province Engineering Research Centre of High-Performance Resins Dalian116024China

Currently,many cancer patients with bone defects are still threatened by tumor recurrence,postoperative bacterial infection,and massive bone *** methods have been studied to endow bone implants with biocompatibility,but it is difficult to find an implant material that can simultaneously solve the problems of anticancer,antibacterial and bone ***,a multifunctional gelatin methacrylate/dopamine methacrylate adhesive hydrogel coating containing 2D black phosphorus(BP)nanoparticle protected by polydopamine(pBP)is prepared by photocrosslinking to modify the surface of poly(aryl ether nitrile ketone)containing phthalazinone(PPENK)*** multifunctional hydrogel coating works in conjunction with pBP,which can deliver drug through photothermal mediation and kill bacteria through photodynamic therapy at the initial phase followed by promotion of *** this design,photothermal effect of pBP control the release of doxorubicin hydrochloride loaded via electrostatic ***,pBP can generate reactive oxygen species(ROS)to eliminate bacterial infection under 808 nm *** the slow degradation process,pBP not only effectively consumes excess ROS and avoid apoptosis induced by ROS in normal cells,but also degrade into PO43􀀀to promote *** summary,nanocomposite hydrogel coatings provide a promising strategy for treatment of cancer patients with bone defects.

关键词： Poly(aryl ether nitrile ketone) Nanocomposite hydrogel coating Black phosphorus Antitumor and PDT antibacterial therapy Osteogenesis

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Block Sequence Effects on the Self-Assembly Behaviors of Polypeptide-Based Penta-Block Copolymer Hydrogels

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ACS Applied Materials and Interfaces 2024年第5期16卷 6674-6686页

作者： Wang, Ke-Hsin Liu, Chung-Hao Tan, Dun-Heng Nieh, Mu-Ping Su, Wei-Fang Department of Materials Science and Engineering National Taiwan University No. 1 Sec. 4 Roosevelt Road Taipei10617 Taiwan Polymer program Institute of Materials Science University of Connecticut 25 King Hill Road Unit 3136 StorrsCT06269-3136 United States Department of Chemical and Biomolecular Engineering University of Connecticut StorrsCT06269 United States Department of Materials Engineering Ming-Chi University of Technology 84 Gungjuan Rd. New Taipei City243303 Taiwan

Peptide-based hydrogels have great potential for applications in tissue engineering, drug delivery, and so on. We systematically synthesize, characterize, and investigate the self-assembly behaviors of a series of polypeptide-based penta-block copolymers by varying block sequences and lengths. The copolymers contain hydrophobic blocks of poly(γ-benzyl-l-glutamate) (PBG, Bx) and two kinds of hydrophilic blocks, poly(l-lysine) (PLL, Ky) and poly(ethylene glycol) (PEG, EG34), where x and y are the number of repeating units of each block, where PBG and PLL blocks have unique functions for nerve regeneration and cell adhesion. It shows that a sufficient length of the middle hydrophilic segment capped with hydrophobic end PBG blocks is required. They first self-assemble into flower-like micelles and sequentially form transparent hydrogels (as low as 2.3 wt %) with increased polymer concentration. The hydrogels contain a microscale porous structure, a desired property for tissue engineering to facilitate the access of nutrient flow for cell growth and drug delivery systems with high efficiency of drug storage. We hypothesize that the structure of Bx-Ky-EG34-Ky-Bx agglomerates is beyond micron size (transparent), while that of Ky-Bx-EG34-Bx-Ky is on the submicron scale (opaque). We establish a working strategy to synthesize a polypeptide-based block copolymer with a wide window of sol-gel transition. The study offers insight into rational polypeptide hydrogel design with specific morphology, exploring the novel materials as potential candidates for neural tissue engineering. © 2024 The Authors. Published by American chemical Society

关键词： Block copolymers

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Ion-Anchoring Dipole-Integrated Composite Elastomer Electrolyte and Cathode for High-Performance Lithium Metal Batteries via Multiple-Bridge engineering

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Advanced Energy Materials 2025年

作者： Cho, A Hyeon Je, Ji Hyang Choi, U Hyeok Department of Polymer Science and Engineering and Program in Environmental and Polymer Engineering Inha University Incheon22212 Korea Republic of

Solid-state electrolytes (SSEs) hold significant potential for advancing lithium metal batteries (LMBs) by enhancing safety through the replacement of liquid electrolytes. However, challenges such as low ionic conductivity, limited electrochemical stability, and poor electrolyte/electrode interface compatibility hinder the development of high-energy-density LMBs. Herein, a strategy for designing SSEs is proposed using multiple-bridge engineered composite elastomer electrolytes (CEEs) that incorporate ion-rotating dipole interactions, ion-anchoring dipole interactions, and hydrogen bonding, along with a CEE-based composite elastomer cathode (CEC). This design combines a volume-adaptive elastomer matrix, a high-Li+ conducting deep eutectic electrolyte, and robust nanowires. The resultant CEE exhibits high ionic conductivity (1.7 × 10−3 S cm−1), a lithium transference number of 0.72, and a wide electrochemical stability window (up to 4.9 V) at 298 K. The engineered uniform Li+ flux also promotes stable Li plating/stripping for over 900 h at 0.1 mA cm−2. Furthermore, the LFP-based CEC|CEE|Li full cells deliver a reversible capacity of 133 mAh g−1 with 95% retention after 300 cycles in coin cells, and 129 mAh g−1 with 96% retention after 250 cycles in pouch cells at 1 C. This strategy presents a promising approach for designing solid-state polymer electrolytes to extend the lifespan of high-energy-density LMBs. © 2025 Wiley-VCH GmbH.

关键词： Elastomers

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Self-Assembled Protein Hybrid Nanofibrils for Photosynthetic Hydrogen Evolution

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CCS Chemistry 2024年第3期6卷 812-823页

作者： Weijian Chen Xiantao Hu Andi Hu Luyang Ji Yiming Huang Hao Heng Fude Feng Shu Wang Department of Polymer Science and Engineering School of Chemistry and Chemical EngineeringNanjing UniversityJiangsuNanjing 210023 Beijing National Laboratory for Molecular Sciences Key Laboratory of Organic SolidsInstitute of ChemistryChinese Academy of SciencesBeijing 100190

In artificial photosynthesis systems,synthetic diiron complexes are popular[FeFe]-hydrogenase mimics,which are attractive for the fabrication of photocatalyst-protein hybrid structures to amplify hydrogen(H2)generation ***,constructing a highly bionic and efficient catalytic hybrid system is a major ***,we designed an ideal hybrid nanofibrils system that incorporates the crucial components:(1)a[FeFe]-H2ase mimic,which has a three-arm architecture(named triFeFe)for more interaction sites and higher catalytic activity and(2)uniform hybrid nanofibrils as the biological environment in which cysteine-catalyst coordination and the hydrogen-bonding network play a vital role in both catalyst binding and hydrogen evolution reaction *** assembled hybrid nanofibrils achieve efficient H2 generation with a turnover number of 2.3×103,outperforming previously reported diiron catalyst-protein hybrid ***,the hybrid nanofibrils work with photosynthetic thylakoids to produce H2,without extra photosensitizers or electron shuttle proteins,which advances the bioengineering of living systems for solar-driven biofuel production.

关键词： hybrid photocatalyst in situ assembly amyloid fibrils photosynthetic hydrogen evolution thylakoid

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Application of a Self-Assembly Sensing Layer to Grating Sensor Cabinets for Biomedical Sensing of Rheumatoid Arthritis Antigen-Antibodies

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IEEE Sensors Journal 2024年第7期24卷 10039-10047页

作者： Wen, Hsin-Yi Hsu, Hsiang-Cheng Feng, Wen-Kai Jhan, Kai-Siang Yeh, Yao-Tsung Chiang, Chia-Chin National Kaohsiung University of Science and Technology Department of Chemical and Materials Engineering Kaohsiung80778 Taiwan National Kaohsiung University of Science and Technology College of Maritime Department of Ph.D. Program in Maritime Science and Technology Kaohsiung807618 Taiwan National Kaohsiung University of Science and Technology Department of Mechanical Engineering Kaohsiung80778 Taiwan Fooyin University Department of Medical Laboratory Science and Biotechnology Kaohsiung83102 Taiwan

In this article, we harnessed biomedical applications in laser-assisted etching long-period fiber gratings (LLPFGs) sensors, subsequently deploying them within the realm of biomedical applications. The primary aim of this study was to devise a sensitive method for the detection of antigen-antibodies associated with rheumatoid arthritis (RA) using LLPFGs. Sensing the antigen binding took place on the surface of the optical fiber through a self-assembling process. Given the inherent limitations of conventional rheumatoid factor (RF) testing in terms of specificity, we introduced an innovative serum-based approach geared toward the identification of anti-cyclic citrullinated peptide (Anti-CCP) antibodies. This method exhibited an impressive diagnostic accuracy rate of approximately 80% for RA cases, coupled with an exceptional specificity level of 98% for individuals without RA. The incorporation of LLPFGs in the detection of RA antigen-antibodies presents a highly promising avenue for enhancing the precision and reliability of RA diagnosis. Furthermore, this research aligns closely with the United Nations Sustainable Development Goal (SDG)3, which strives to promote well-being across all age groups and advance sustainable development by addressing health-related challenges, including the accurate diagnosis of diseases like RA. © 2023 IEEE.

关键词： Antibodies

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A novel reprocessable chloroprene rubber based on dynamic disulfide metathesis

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International Journal of Smart and Nano Materials 2024年第1期15卷 42-61页

作者： Jianliang Jiang Junxue Zhai Yanqing Chen Dongqi Zhao Yakai Feng School of Chemical Engineering and Technology Collaborative Innovation Center of Chemical Science and Chemical Engineering(Tianjin)Tianjin UniversityTianjinChina R&D Department of China(Yangzhou) Material Handling Tech-Engineering LtdYangzhouChina Key Laboratory of Rubber Plastics of Ministry of Education/Shandong Province (QUsT)School of Polymer Science&EngineeringQingdao University of Science&TechnologyQingdaoChina R&D Department of Tianjin Joaboa Technology Co.Ltd TianjinP.R.China Frontiers Science Center for Synthetic Biology Tianjin UniversityTianjinChina Key Laboratory of Systems Bioengineering(Ministry of Education) Tianjin UniversityTianjinChina

For sustainable application of chloroprene rubber(CR),a new technology is developed by the vulcanization of CR using 2,2'-dithiodipyridine(DPD)as a cross-linking agent with the repro-cessing performance owing to disulfde *** DPD was incorporated into CR vulcanization,the Menschutkin reac-tion between allyl chloride group and pyridine group occurred with a maximum exothermic peak at 184°*** number of effective cross-linking bond at o.5 phr DPD vulcanizate was higher than that at high DPD *** vulcanizate showed high tensile strength(11.12 MPa)and elongation at break(1253±120%)owing to the exchangeable disulfide bond in the *** the catalysis of triphenylphosphine,the metathesis of disulfide compound was improved obviously,which endowed CR/DPD vulcanizates with good recyclability *** cross-linkage maintains its stability at low temperature,thus ensuring the mechanical stability of CR/DPD vulcanizate under the ambient *** and reprocessing of CR/DPD vulcanizate can be conducted with common industrial rubber processing *** reprocessable chloroprene rubber could have potential appli-cation in CR industry,also serve to significantly improve envir-onmental sustainability.

关键词： Chloroprene rubber reprocessable Menschutkin reaction disulfide

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