天然橡胶生物纳米复合材料，由水性 KOH/尿素溶液中的自组装甲壳素纳米纤维增强。

Natural rubber bio-nanocomposites reinforced with self-assembled chitin nanofibers from aqueous KOH/urea solution.

机构信息

Key Laboratory of Rubber-Plastics, Ministry of Education/Shandong Provincial Key Laboratory of Rubber-Plastics, Qingdao University of Science & Technology, Qingdao 266042, People's Republic of China; College of Food Science and Engineering, Wuhan Polytechnic University, Wuhan 430023, People's Republic of China.

Key Laboratory of Rubber-Plastics, Ministry of Education/Shandong Provincial Key Laboratory of Rubber-Plastics, Qingdao University of Science & Technology, Qingdao 266042, People's Republic of China.

出版信息

Carbohydr Polym. 2019 Dec 1;225:115230. doi: 10.1016/j.carbpol.2019.115230. Epub 2019 Aug 21.

DOI:10.1016/j.carbpol.2019.115230

PMID:31521261

Abstract

Rigid chitin nanofibers (ChNFs) self-assembled from dilute α-chitin/KOH/urea aqueous solution were utilized as 1D filler to reinforce soft natural rubber (NR). The prepared ChNFs suspension has good compatibility with natural rubber latex (NRL) and thus showing favorable dispersibility in NR matrix at nanoscale. The bio-nanocomposites were fabricated by casting and evaporating the pre-mixed NRL/ChNFs suspensions with different ChNFs loadings. Gratifyingly, the NR/ChNFs bio-nanocomposite with only 0.3 wt% ChNFs content presented distinct improvement in both the strength and toughness due to the large aspect ratio of ChNFs and its homogeneous dispersion in NRL matrix. Moreover, the introduction of ChNFs can promote the proliferation of mBMSCs effectively and endow NR/ChNFs bio-nanocomposites with good biocompatibility, enabling expanded applications of NR in biomedical field, such as artificial blood vessel, cosmetology prosthesis and human diaphragm materials.

摘要

刚性甲壳素纳米纤维（ChNFs）自稀 α-甲壳素/KOH/尿素水溶液中自组装而成，用作 1D 填充剂来增强软质天然橡胶（NR）。所制备的 ChNFs 悬浮液与天然橡胶胶乳（NRL）具有良好的相容性，因此在 NR 基质中具有良好的纳米分散性。通过浇注和蒸发具有不同 ChNFs 负载的预混合的 NRL/ChNFs 悬浮液来制备生物纳米复合材料。令人高兴的是，NR/ChNFs 生物纳米复合材料仅含有 0.3wt%的 ChNFs 含量，由于 ChNFs 的大纵横比及其在 NRL 基质中的均匀分散，其强度和韧性均得到明显提高。此外，ChNFs 的引入可以有效地促进 mBMSCs 的增殖，并赋予 NR/ChNFs 生物纳米复合材料良好的生物相容性，使 NR 在生物医学领域的应用得到扩展，如人造血管、美容假体和人类横膈膜材料。