多酚衍生物和铝可持续皮革制造的分层扩散-组装-交联策略(Ⅲ)

IF 4.5 2区 化学 Q2 POLYMER SCIENCE
Yuanhang Xiao , Jiyu Liang , Minmin Liu , Jiajing Zhou , Chunhua Wang , Wei Lin
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引用次数: 0

摘要

基于植物多酚的无铬技术对可持续皮革生产至关重要,但目前的策略面临着设计有效的鞣制系统以实现与Cr相当的鞣制性能的挑战(Ⅲ)。有效调控无铬鞣剂在胶原基质中的扩散和交联是解决这一问题的关键。本文以10%的多酚衍生物(即GACC)和2%的Al(Ⅲ)为基础,建立了一种无铬鞣制体系,其协同作用增强了胶原蛋白层次结构内的扩散和交联。分子动力学模拟和实验表明,GACC和Al(Ⅲ)可以通过配位键、共价键和氢键扩散到原纤维层次中,并在胶原基质内形成分子间和纤维内交联。此外,GACC的羧基和羟基与Al(Ⅲ)通过原位组装形成多尺度的GACC-Al配位聚合物(120 ~ 570 nm),与胶原结合形成从初级纤维到纤维水平的多点交联网络。因此,这些发现首次被总结为分层扩散-组装-交联策略。与商业无铬鞣制相比,独特的鞣制策略使皮革具有高胶原基质孔隙率(~ 56.4%),显著增强的水热稳定性(Ts ~ 87°C),优异的感官(例如,柔软度~ 6.3 mm)和物理性能(例如,撕裂强度~ 64.3 N/mm,断裂伸长率~ 100.5%)。这项工作为开发鞣制机制和可持续的无铬鞣制系统提供了有价值的见解。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Hierarchical diffusion-assembly-crosslinking strategy for sustainable leather manufacturing by polyphenol derivatives and Al(Ⅲ)

Hierarchical diffusion-assembly-crosslinking strategy for sustainable leather manufacturing by polyphenol derivatives and Al(Ⅲ)

Hierarchical diffusion-assembly-crosslinking strategy for sustainable leather manufacturing by polyphenol derivatives and Al(Ⅲ)
Chrome-free technologies based on vegetable polyphenols are critical for sustainable leather production, yet current strategies face the challenges of designing effective tanning system in achieving comparable tanning performances to that of Cr(Ⅲ). The key solution is to efficiently regulate the diffusion and crosslinking of chrome-free tanning agents in collagen matrix. Herein, a chrome-free tanning system was established based on 10 % polyphenol derivative (i.e., GACC) and 2 % Al(Ⅲ), which synergistically enables the enhanced diffusion and crosslinking within hierarchical structure of collagen. Molecular dynamics simulations and experiments showed that GACC and Al(Ⅲ) can diffuse into the hierarchy of fibrils and form intermolecular and intrafibrillar crosslinking within collagen matrix via coordination, covalent, and hydrogen bonds. Moreover, the carboxyl and hydroxyl groups of GACC coordinate with Al(Ⅲ) to form multi-scale GACC-Al coordination polymers (120−570 nm) via in-situ assembly, which bound with collagen to form multi-point crosslinking networks from elementary fibers to fibers levels. Thus, these findings are summarized as the hierarchical diffusion-assembly-crosslinking strategy for the first time. The unique tanning strategy endows leather with high porosity of collagen matrix (∼56.4 %), and remarkably enhanced hydrothermal stability (Ts ∼87 °C), excellent organoleptic (e.g., softness ∼6.3 mm) and physical properties (e.g., tear strength ∼64.3 N/mm, elongation at break ∼100.5 %) compared with commercial chrome-free tanning. The work provides valuable insights for developing tanning mechanisms and sustainable chrome-free tanning systems.
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来源期刊
Polymer
Polymer 化学-高分子科学
CiteScore
7.90
自引率
8.70%
发文量
959
审稿时长
32 days
期刊介绍: Polymer is an interdisciplinary journal dedicated to publishing innovative and significant advances in Polymer Physics, Chemistry and Technology. We welcome submissions on polymer hybrids, nanocomposites, characterisation and self-assembly. Polymer also publishes work on the technological application of polymers in energy and optoelectronics. The main scope is covered but not limited to the following core areas: Polymer Materials Nanocomposites and hybrid nanomaterials Polymer blends, films, fibres, networks and porous materials Physical Characterization Characterisation, modelling and simulation* of molecular and materials properties in bulk, solution, and thin films Polymer Engineering Advanced multiscale processing methods Polymer Synthesis, Modification and Self-assembly Including designer polymer architectures, mechanisms and kinetics, and supramolecular polymerization Technological Applications Polymers for energy generation and storage Polymer membranes for separation technology Polymers for opto- and microelectronics.
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