壳聚糖改性甲壳素纳米晶须胆甾相液晶体系中悬浮液向各向异性微纤维的转变。

IF 5.5 2区化学 Q1 BIOCHEMISTRY & MOLECULAR BIOLOGY

Biomacromolecules Pub Date : 2025-06-09 DOI:10.1021/acs.biomac.4c01705

Phanicha Wiwatsamphan , Kohji Tashiro , Sono Sasaki , Thanit Kertsomboon , Patakorn Pilasen , Fanatchanon Maneechot , Suwabun Chirachanchai

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引用次数: 0

摘要

天然纤维的强度归因于纳米/微纤维的各向异性排列。为了模拟这种情况，本研究提出了一种浓度诱导的胆固醇甾体液晶（CLC）相，用于壳聚糖表面修饰的几丁质纳米晶须（CTWK-CS）的悬浮液。这一阶段使湿纺丝工艺能够生产出各向异性的微纤维。虽然纺丝过程中的剪切力可能会干扰CLC结构，但双折射颜色和透射电镜横截面证实了其在微纤维中的部分保留。纤维韧性可通过拉伸后调节。纤维在乙酸中的溶解表明，分子间和分子内的氢键对纤维的结构完整性起着至关重要的作用。这项工作表明，纳米晶须预先组织成CLC相，可以从胶体悬浮液中直接形成有序的微纤维。

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Transformation from Suspension to Anisotropic Microfiber in the System of the Cholesteric Liquid Crystalline Phase of Chitin-Nanowhisker with the Surface Modified by Chitosan

The strength of natural fibers is attributed to the anisotropic alignment of nano/microfibrils. To mimic this, the present work proposes a concentration-induced cholesteric liquid crystalline (CLC) phase for a suspension of chitin nanowhiskers surface-modified with chitosan (CTWK-CS). This phase enables the wet-spinning process to produce anisotropic microfibers. Although shear forces during spinning are expected to disturb the CLC structure, birefringent colors and TEM cross sections confirm its partial retention in the microfibers. Fiber tenacity is tunable through poststretching. Fiber dissolution in acetic acid indicates that inter- and intramolecular hydrogen bonding contribute critically to the structural integrity. This work demonstrates that the preorganization of nanowhiskers into a CLC phase allows the direct formation of ordered microfibers from colloidal suspension.

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来源期刊

Biomacromolecules 化学-高分子科学

CiteScore

10.60

自引率

4.80%

发文量

417

审稿时长

1.6 months

期刊介绍： Biomacromolecules is a leading forum for the dissemination of cutting-edge research at the interface of polymer science and biology. Submissions to Biomacromolecules should contain strong elements of innovation in terms of macromolecular design, synthesis and characterization, or in the application of polymer materials to biology and medicine. Topics covered by Biomacromolecules include, but are not exclusively limited to: sustainable polymers, polymers based on natural and renewable resources, degradable polymers, polymer conjugates, polymeric drugs, polymers in biocatalysis, biomacromolecular assembly, biomimetic polymers, polymer-biomineral hybrids, biomimetic-polymer processing, polymer recycling, bioactive polymer surfaces, original polymer design for biomedical applications such as immunotherapy, drug delivery, gene delivery, antimicrobial applications, diagnostic imaging and biosensing, polymers in tissue engineering and regenerative medicine, polymeric scaffolds and hydrogels for cell culture and delivery.