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Preparation of Silk Nanowhisker-Composited Amphoteric Cellulose/Chitin Nanofiber Membranes.
Biomacromolecules ( IF 5.5 ) Pub Date : 2020-03-26 , DOI: 10.1021/acs.biomac.0c00223 Yanlei Hu 1 , Liang Liu 1 , Juan Yu 1 , Zhiguo Wang 2 , Yimin Fan 1
Biomacromolecules ( IF 5.5 ) Pub Date : 2020-03-26 , DOI: 10.1021/acs.biomac.0c00223 Yanlei Hu 1 , Liang Liu 1 , Juan Yu 1 , Zhiguo Wang 2 , Yimin Fan 1
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Native biopolymer nanofibers (cellulose, chitin, and silk nanofiber) are one of the most important contributors to the outstanding functions and mechanical properties of natural materials. To enhance the mechanical performance, A great deal of top-down routes have been reported to prepare biopolymers nanofibers/nanowhiskers that retaining their nanostructures. Compared with advances in cellulose and chitin nanofibers/nanowhiskers, it remains difficult for direct downsizing the natural silk fibers into silk nanofibers/nanowhiskers (SNFs/SNWs) because of their high crystallinity and sophisticated structures. In this work, environmentally friendly and recyclable deep eutectic solvents (DESs) were used to direct pretreat and downsize natural silks into silk nanowhiskers with high yield. SNWs with similar diameter (3.1–22 nm for OA/ChCl DES treated SNWs, 2.7–20 nm for CA/ChCl DES treated SNWs) and contour length (329 ± 140 nm for OA/ChCl DES treated SNWs, 365 ± 200 nm for CA/ChCl DES treated SNWs) to individual nanofibers in natural silk fibers were obtained. In addition, the separated DES with a recovery yield of at least 92% could be reused four times to produce SNWs, indicating the possibility of DESs as green solvents for sustainable biopolymer nanomaterial extraction. Based on the inherent amphoteric properties of SNWs, multicompatibility was explored to facilely composite SNWs with various polymers for preparation of coextruded membranes with enhanced performance and endowed the composites with protein-endowed double adsorption properties. Overall, this work demonstrated that the DES pretreatment process is promising for green and low-cost biopolymer nanomaterial extraction and that the SNWs prepared via DES have good prospects as nanoscale materials in the environmental field and in development of smart biomaterials and drug delivery in biomedicine.
中文翻译：
丝纳米晶须复合两性纤维素/甲壳素纳米纤维膜的制备。
天然生物聚合物纳米纤维（纤维素，甲壳质和丝绸纳米纤维）是天然材料杰出功能和机械性能的最重要贡献者之一。为了提高机械性能，已经报道了许多自上而下的路线来制备保留其纳米结构的生物聚合物纳米纤维/纳米晶须。与纤维素和几丁质纳米纤维/纳米晶须的进展相比，由于其高结晶度和复杂的结构，仍然难以直接将天然丝纤维小型化为纳米纤维/纳米晶须（SNFs / SNWs）。在这项工作中，使用了环保且可回收的深共熔溶剂（DES），以高产率将预处理和精制天然丝导入纳米丝晶须中。直径相似的SNW（3。OA / ChCl DES处理的SNW为1-22 nm，CA / ChCl DES处理的SNW为2.7-20 nm）和轮廓长度（OA / ChCl DES处理的SNW为329±140 nm，CA / ChCl DES处理的SNW为365±200 nm SNWs）到天然丝纤维中的单个纳米纤维。此外，分离出的DES的回收率至少为92％，可以重复使用四次以生产SNW，这表明DESs作为绿色溶剂可持续生物聚合物纳米材料提取的可能性。基于SNWs固有的两性特性，探索了多种相容性，以方便地将SNWs与各种聚合物复合以制备具有增强性能的共挤出膜，并使复合材料具有蛋白质赋予的双重吸附特性。总体，
更新日期：2020-04-23
中文翻译：
丝纳米晶须复合两性纤维素/甲壳素纳米纤维膜的制备。
天然生物聚合物纳米纤维（纤维素，甲壳质和丝绸纳米纤维）是天然材料杰出功能和机械性能的最重要贡献者之一。为了提高机械性能，已经报道了许多自上而下的路线来制备保留其纳米结构的生物聚合物纳米纤维/纳米晶须。与纤维素和几丁质纳米纤维/纳米晶须的进展相比，由于其高结晶度和复杂的结构，仍然难以直接将天然丝纤维小型化为纳米纤维/纳米晶须（SNFs / SNWs）。在这项工作中，使用了环保且可回收的深共熔溶剂（DES），以高产率将预处理和精制天然丝导入纳米丝晶须中。直径相似的SNW（3。OA / ChCl DES处理的SNW为1-22 nm，CA / ChCl DES处理的SNW为2.7-20 nm）和轮廓长度（OA / ChCl DES处理的SNW为329±140 nm，CA / ChCl DES处理的SNW为365±200 nm SNWs）到天然丝纤维中的单个纳米纤维。此外，分离出的DES的回收率至少为92％，可以重复使用四次以生产SNW，这表明DESs作为绿色溶剂可持续生物聚合物纳米材料提取的可能性。基于SNWs固有的两性特性，探索了多种相容性，以方便地将SNWs与各种聚合物复合以制备具有增强性能的共挤出膜，并使复合材料具有蛋白质赋予的双重吸附特性。总体，
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