Polymer Chemistry
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2025
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IF 3.9
Xu Han,Le Chang,Zeqian Wang,Xinfang Zhang,Feng Liu
Silicon side chain modification is an effective way for improving solvent resistance of one-component polysulfide adhesives, but the introduction of silicon side chains decreases hydrogen bonding interactions, leading to some reduction in initial mechanical properties. Based on the silicon modification, inserting more hydrogen bonding sites into a system is a viable approach to solving the above problems. In this work, a series of novel silicon side chain-modified one-component polysulfide adhesives (Sis-OCPSs) were successfully prepared using chain extenders in different proportions: 1,4-butanedithiol (BSO) and 1,3-bis(trimethylsilyl)urea (BSU). As expected, the CO groups and dual silicon side chains in BSU provide more active sites and silicon content, effectively reinforcing mechanical properties and solvent resistance. The optimal overall performance was obtained when the mass ratio of BSO and BSU was 8 : 1. Compared to silane side chain modification (Si-OCPS3) and before modification (Sis-OCPS0), Sis-OCPS3 exhibited the highest tensile strength, elongation and shear strength of 23.75 ± 0.34 MPa, 439.03% and 4.72 ± 0.27 MPa, respectively. Moreover, the tensile strength of Sis-OCPS3 could still reach 20.86 ± 0.29 MPa and 19.04 ± 0.27 MPa after immersion in oil and water for 21 d. We believe our paradigm can offer a feasible approach for designing high-performance one-component polysulfide adhesives.
研究领域:
高分子材料科学
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胶粘剂化学
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功能改性材料
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有机合成化学
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材料耐久性
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2025
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IF 9
Wenhui Hu,Zhipeng Yan,Jianyang Jia,Qiangqiang Song,Taoning Fan,Qin Shen,Kecheng Guan,Xueling Wang,Yuqing Lin,Jing Wang,Hideto Matsuyama,Yatao Zhang
Covalent organic frameworks (COFs) with tunable porous network structures afford unheard-of opportunities for high-efficient solvents-resistant molecular separation. Presently, the practicability of COFs membranes is critically constricted by its inflexible essence, weak interlaminar interaction and wider pore size, enabling the arduous preparation of defect-free membranes. In this work, a series of composite nanofiltration membranes were formed via a mixed dimensional assembly of COF-TAPT-BTA nanosheets and silk nanofibrils (SNF). The SNF with large aspect ratio and well-supplied functional groups effectively reduced the pore entrance of COF-TAPT-BTA (shielding effects) and intensified membrane's integrity. The interweaving and interlocked nanopore render the resultant COF@SNF-X membranes with precise molecular sieving abilities besides the augmented stability arose from the multiple interaction. Accordingly, the optimized COF@SNF-X membrane manifested an ultrahigh methanol permeance of 1365.5 L m −2 h −1 bar −1 with a high rejection of 96.0 % for DR 23.
研究领域:
材料科学
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化学工程
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膜技术
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分离科学
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
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2025
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IF 7.3
Baolong Xue,Xuejing Liu,Yuying Liu,Qibin Xu,Junfeng Ke,Mengjin Jiang
Flexographic printing plates, which are typically composed of a metal substrate, an adhesive layer, and a poly(vinyl alcohol) (PVA) photosensitive layer, are essential for achieving high-resolution patterns in flexographic printing technology. The adhesive layer, serving as the bonding interface between the metal and PVA layers, must exhibit strong adhesion to both metal and polymer surfaces, along with high toughness, mechanical strength, solvent resistance, and durable adhesion to meet the mechanical and chemical requirements of flexographic printing technology. Herein, inspired by the structure of mussel foot silk protein, this study integrates carbon–carbon double bonds, catechol, alcohol hydroxyl, and amino ester groups into a single polymer chain via a two-step reaction. Benefits to its rigid-flexible cross-linked network, the obtained adhesive exhibits good strength, modulus, and toughness. Specifically, its tensile strength, tensile modulus, elongation at break, and impact strength are 1.70 MPa, 0.85 GPa, 19.3 %, and 2.97 kJ/m 2 , respectively. Furthermore, the adhesive achieves a 180° peel strength of 2.26 N/mm with tinplate and 3.89 N/mm with flexographic printing plates. Notably, after 7 days of immersion in water, ethanol, and dimethylformamide, the 180° peel strength retention rate was as high as 96.9 %, 96.2 %, and 93.9 %, respectively. After being stored at room temperature for 28 days, the 180° peel strength retention rate reaches up to 98.3 %, highlighting its long-lasting durability. This mussel-inspired group integration strategy provides a straightforward and efficient approach for developing high-performance multi-functional adhesives, with significant potential for advancing flexographic printing.
✓ 已验证
产品关联
DOI
高影响因子
LANGMUIR
·
2025
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IF 3.9
Xin Song,Chunfeng Li,Lei Le,Mingli Liu
Waterborne polyurethanes (WPUs) have become the preferred alternative for researchers aiming to replace solvent/emulsion-based resins in carbon fiber (CF) coatings, owing to their superior adhesion, eco-friendliness, and cost-effectiveness. However, conventional polyester-based WPUs have often exhibited inadequate mechanical properties, thermal stability, and solvent resistance. To tackle these limitations, modified WPUs were developed by incorporating alkyl long chains, benzene π–π bond stacking, aromatic ring ether bonds, and biphenyl groups into the molecular structure through the functionalization of the polymerization system with 1,7-hexanediol, ethoxylated bisphenol A, and 1,3/1,4-bis(2-hydroxyethoxy) benzene. The inclusion of these comonomers optimized the properties of the WPUs with significant increases in thermal weight loss temperature T5% and tensile strength of 23.4% and 53.1%, respectively. The utilization of WPUs as coatings proved to be highly effective in enhancing the chemical activity, wettability, and mechanical properties of CF. The application of the coating resulted in a substantial improvement, with a 58.2% increase in the fiber surface energy and a 21.5% enhancement in the filament tensile strength, reaching values of 54.1 mN/m and 6.053 GPa, respectively. Furthermore, the WPUs exhibited the capability of rectifying defects in CF and enhancing surface roughness. Importantly, the tensile properties of WPUs-CF exceeded those of numerous established counterparts globally, highlighting a broad spectrum of potential applications.
研究领域:
材料科学
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高分子科学
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化学工程
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纳米技术
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复合材料
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表面工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
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2025
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IF 2.8
Yuqing Wang,Xiaojuan Ma,Wuxiang Chen,Miaoming Huang,Hao Liu,Wentao Liu,Suqin He,Wanlin Xu
Self-repairable polymers with dynamic covalent bonds (e.g., disulfide bonds) are of interest because of their potential to extend tenure. Polyurethane, known for its tunable mechanical properties and versatility, has been explored for self-healing applications. However, self-healing polyurethane often faces compromise between mechanical strength, scratch/solvent resistance, and self-healing efficiency, especially where colorless transparency is required. This study addresses these limitations by synthesizing a micro-crosslinked polyurethane urea (mc-PUU) using polycarbonate diol as soft segments, isophorone diisocyanate as hard segments, cystamine dihydrochloride as chain extender, and a small amount of 1,3,5-tris(2-hydroxyethyl)cyanuric acid as crosslinker. The structure and properties of mc-PUU are investigated. The results show that compared with linear PUU, the mc-PUU maintains colorless transparency (light transmittance), good tensile strength (58.5 ± 1.6 MPa), and elongation at break (470.7 ± 17.4%), toughness (145.1 ± 7.2 MJ/m 3 ), and self-healing efficiency (70.7% tensile strength recovery, 80.4% elongation recovery), while significantly improving Young's modulus (179.9 MPa), Shore D hardness (52 HD), scratch resistance up to pencil hardness, and solvent resistance (more than 97.3% weight retention after 30 days immersion of acid, alkali, salt, water, and ethanol). The micro-crosslinked structure uniquely balances mechanical robustness and self-healing ability, making mc-PUU a promising candidate for protective coatings in optical and industrial applications.
研究领域:
材料科学
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高分子科学
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化学工程
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机械工程
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光学材料
✓ 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）