Reactive spinning to achieve nanocomposite gel fibers: from monomer to fiber dynamically with enhanced anisotropy
Reactive spinning to achieve nanocomposite gel fibers: from monomer to fiber dynamically with enhanced anisotropy
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反应纺丝实现纳米复合凝胶纤维：从单体到纤维动态增强各向异性
DOI：
10.1039/c9mh01390c
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发表时间：
2020-03
影响因子：
13.3
通讯作者：
Zhu Meifang
中科院分区：
文献类型：
--
作者：
Wei Peiling;Hou Kai;Chen Tao;Chen Guoyin;Mugaanire Innocent Tendo;Zhu Meifang
基于对纳米复合水凝胶（NC凝胶）耗时的凝胶化机理和优异的物理拉伸性能的分析，预凝胶（pre-gel）是聚合物链增长和交联结构逐渐形成过程中介于前体和水凝胶之间的中间相，具有很大的反应纺丝潜力。然后，一个简单的反应性纺丝的纳米复合材料凝胶纤维（NC-GF）的规模化制造的预凝胶结合一个额外的后拉伸过程中的前体溶液的凝胶化。的混合前体的反应动力学进行监测，以提供精确的时间控制从溶胶到预凝胶的相变区域。在临界凝胶化点（CGP）之后的特定时间区域，所形成的预凝胶表现出优异的可拉伸性以维持随后的物理后拉伸，然后可以连续收集以获得NC-GF。对预凝胶施加后拉伸不仅控制了NC-GF的直径，而且还诱导了粘土-聚合物微区沿着拉伸方向的取向结构的演化，导致NC-GF的高各向异性和增强的机械性能。此外，利用不可结晶的甘油/H2O作为共溶剂，这样的NC-GF显示出改善的长期实用性，包括突出的稳定的机械性能，以及防冻性能（-20 ℃）。
Based on the analysis of time-consuming gelation mechanisms and excellent physical elongations of nanocomposite hydrogels (NC gels), pre-gel, which is an intermediate phase between precursor and hydrogel during the propagation of the polymer chain and gradual formation of cross-linked structures, has been found to display great reactive spinning potential. Then, a facile reactive spinning is presented for scalable fabrication of nanocomposite gel fibers (NC-GFs) from pre-gel by combining with an additional post-drawing process during gelation of the precursor solutions. The reactive kinetics of the hybrid precursor are monitored to offer precise temporal control of the phase transition regions from sol to pre-gel. At a specific time region after the critical gelation point (CGP), the formed pre-gel exhibited excellent stretchable property for sustaining subsequent physical post-drawing, and then could be continuously collected to obtain NC-GFs. The imposed post-drawing on the pre-gel not only exerted control over the diameter of the NC-GFs, but also induced evolution of an oriented structure of clay-polymer micro-domain along the stretching direction, resulting in high anisotropy and enhanced mechanical performance of the NC-GFs. Besides, utilizing the non-crystallizable glycerol/H2O as a co-solvent, such NC-GFs displayed improved long-term practicality, including outstanding stable mechanical performance, as well as anti-freezing property (-20 degrees C).
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用于三维细胞微环境工程的功能和仿生材料
影响因子：
62.1
作者：
Huang G;Li F;Zhao X;Ma Y;Li Y;Lin M;Jin G;Lu TJ;Genin GM;Xu F
通讯作者：
Xu F
DOI：
10.1016/j.compositesb.2019.107037
发表时间：
2019-10
期刊：
Composites Part B: Engineering
影响因子：
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作者：
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通讯作者：
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作者：
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通讯作者：
Xiong-fei Zhang;Xiaofeng Ma;Ting Hou;Kechun Guo;Jiayu Yin;Zhongguo Wang;Lian Shu;Ming He
影响因子：
7.015
作者：
Hao, Jinkun;Weiss, R. A.
通讯作者：
Weiss, R. A.
DOI：
10.1073/pnas.1121605109
发表时间：
2012-06-19
影响因子：
11.1
作者：
Coburn, Jeannine M.;Gibson, Matthew;Elisseeff, Jennifer H.
通讯作者：
Elisseeff, Jennifer H.