Materials Today Communications
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2025
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IF 4.5
Hao Zhang,Ye Wang,Changle Tan,Jie Zhu,Xiang Sha,Dongqi Diao,Hongyan Liu,Ning Li,Fanglei Zeng
In this paper, polytetrahydrofuran (PTMEG) and isophorone diisocyanate (IPDI) were used as raw materials to synthesize prepolymers, and then castor oil (CO) was added to synthesize high-strength bio-based polyurethanes. The effect of castor oil content on the properties of COPU was investigated in this paper, and its heat resistance and mechanical properties firstly increased and then decreased with the increase of CO content.COPU3 showed the best comprehensive mechanical properties, with a tensile strength of 22.55 MPa and an elongation at break of 1008.57 %. The reason for its high strength is explored; it may be that hydrogen bonding and CO form a double cross-linking topological network, which enhances the mechanical strength of the polymer. These studies provide far-reaching value for the application of bio-based materials.
研究领域:
高分子材料
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生物材料
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材料科学
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聚合物化学
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功能材料
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
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2022
·Vol. 10
·期 34
·17699-17709
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IF 14.511
Zhihao Si,Chang Liu,Tanlong Xue,Shuai Yang,Yuhui Cui,Yaqi Wang,Di Cai,Peiyong Qin
Polymeric membranes are in great demand for biofuels, and ultraviolet (UV)-induced crosslinking currently shows a controllable and ultrafast ability for their fabrication, whereas the weak compatibility between the photoinitiator (PI) and polymer remains a great challenge in the large-scale supply of membranes. Herein, we report a polydimethylsiloxane (PDMS) prepolymer simultaneously functionalized with a PI and photocrosslinker, which endows the prepolymer with self-initiation and self-polymerization properties, respectively. The chemically grafted PI shows a stable and homogeneous distribution over 10 days with a superhigh loading (>5 wt%), which provides an extremely high initiation efficiency. Accordingly, the self-initiated/self-polymerized membranes exhibit an excellent comprehensive performance for bioethanol enrichment compared with the state-of-the-art polymeric membranes. Our PI–polymer design provides a general framework for the high-efficiency fabrication of polymeric membranes.
研究领域:
材料科学
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化学工程
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生物技术
✓ 已验证
DOI
高影响因子
POLYMER
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2020
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IF 4.231
Longfang Ren,Xiangdong Ma,Jian Zhang,Taotao Qiang
WPU was prepared by a simple and bio-based method using poly(1,3-propylene glycol-adipic acid) (PPA) and isophorone diisocyanate (IPDI) as raw materials. Intriguingly, PPA can be synthesized using 1,3-propanediol which was extracted from plant stalk. Then a non-toxic, environmental-friendly gallic acid modified bio-based waterborne polyurethane (GWPU) was successfully prepared utilizing the prepolymer method with gallic acid (GA) was as a modifier. The structures, morphologies and thermostability of GWPU were confirmed by FTIR, TEM, TG , DSC and AFM . Furthermore. Its mechanical properties and water resistance were evaluated as well. The results demonstrated that self-prepared PPA has no influence on the properties of polyurethane. However, when the content of GA was increased from 0% to 3.3%, the tensile strength of GWPU film increased by 155.3% compared with that of unmodified PU film, the elongation at break decreased by 86%, and the decomposition temperature of the film increased by 23.8 °C, the surface roughness decreased by 41.0%. In addition, through the crosslinking of GA, the water resistance of GWPU is improved.
研究领域:
材料科学
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高分子化学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
POLYMER
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2025
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IF 4.5
Lishuang Yang,Ruili Li,Jinke Wang,Yujie Gao,Meiyi Wang,Huashan Wang
A photosensitive polyurethane prepolymer with alternating soft and hard segments was synthesized using polyethylene glycol (PEG400) and hexamethylene diisocyanate (HDI). At the same time, hydroxyethyl methacrylate (HEMA) was employed as a chain terminator to introduce acrylate functionalities. The successful formation of urethane linkages was confirmed by Fourier-transform infrared (FTIR) spectroscopy and nuclear magnetic resonance (NMR) spectroscopy. At a soft-to-hard segment molar ratio of 1:1.5, the resulting photopolymerized elastomer exhibited optimal mechanical performance, achieving a tensile strength of 7.8 MPa and an elongation at break of 275%. Furthermore, photopolymerization with lauryl methacrylate (LMA) imparted the material with excellent flexibility. The incorporation of silane-coupling-agent-modified nano-SiO 2 as a reinforcing filler further improved the mechanical strength of the composite. By surface-loading an ionically conductive hydrogel, the material was employed to fabricate a tensile sensor via vat photopolymerization 3D printing, demonstrating its potential in flexible sensing applications.
研究领域:
材料科学
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高分子化学
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增材制造
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传感器
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纳米复合材料
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力学性能
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光聚合
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）