Synergistic Reinforcement of Composite Hydrogels with Nanofiber Mixtures of Cellulose Nanocrystals and Chitin Nanofibers,Biomacromolecules

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Synergistic Reinforcement of Composite Hydrogels with Nanofiber Mixtures of Cellulose Nanocrystals and Chitin Nanofibers
Biomacromolecules ( IF 5.5 ) Pub Date : 2020-12-04 , DOI: 10.1021/acs.biomac.0c01198
Cameron W Irvin _{1,

2} , Chinmay C Satam _{2,

3} , Jianshan Liao _{2,

3} , Paul S Russo _{1,

2,

4} , Victor Breedveld _{2,

3} , J Carson Meredith _{2,

3} , Meisha L Shofner _{1,

2}

Affiliation

Simultaneous incorporation of cellulose nanocrystals (CNCs) and chitin nanofibers (ChNFs) into a polyvinyl alcohol (PVA) matrix opens possibilities for customization of more environmentally friendly composite materials. When used in tricomponent composite hydrogels, the opposite surface charges on CNCs and ChNFs lead to the construction of beneficial nanofiber structures. In this work, composite hydrogels containing CNCs, ChNFs, or their mixtures are produced using cyclic freeze–thaw (FT) treatments. When considering different compositions and FT cycling, tricomponent composite hydrogels containing a specific ratio of CNCs/ChNFs are shown to have promising mechanical performance in comparison to other samples. These results together with results from water absorption, rheological, and light scattering studies suggest that the CNC/ChNF structures produced property improvement by concurrently accessing the stronger interfacial interactions between CNCs and PVA and the longer lengths of the ChNFs for load transfer. Overall, these results provide insight into using electrostatically driven nanofiber structures in nanocomposites.

中文翻译：

纤维素纳米晶体和几丁质纳米纤维的纳米纤维混合物对复合水凝胶的协同增强作用

将纤维素纳米晶体（CNC）和几丁质纳米纤维（ChNF）同时掺入聚乙烯醇（PVA）基质为定制更环保的复合材料提供了可能性。当用于三组分复合水凝胶时，CNCs和ChNFs上相反的表面电荷导致有益的纳米纤维结构的构建。在这项工作中，使用循环冻融（FT）处理工艺生产了包含CNCs，ChNFs或其混合物的复合水凝胶。当考虑不同的组成和FT循环时，与其他样品相比，包含特定比例的CNCs / ChNFs的三组分复合水凝胶显示出具有希望的机械性能。这些结果与吸水，流变，光散射研究表明，CNC / ChNF结构通过同时访问CNC和PVA之间更强的界面相互作用以及更长的ChNF长度来传递载荷，从而改善了性能。总体而言，这些结果提供了在纳米复合材料中使用静电驱动纳米纤维结构的见识。

更新日期：2021-02-08

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