纳米纤维素增强水凝胶的制备、微结构调控机理与特性

项目名称： 纳米纤维素增强水凝胶的制备、微结构调控机理与特性

项目编号： No.31300483

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 农业科学

项目作者： 徐朝阳

作者单位： 南京林业大学

项目金额： 23万元

中文摘要： 传统的水凝胶通常强度较差，本研究拟用化学机械法制备颗粒粒径分布窄、形貌结构确定的纳米纤维素增强聚乙烯醇水凝胶，利用化学交联法和冷冻-解冻法制备多孔环境敏感型水凝胶，运用FTIR、XPS、TEM等手段考察纳米纤维素性状与聚乙烯醇的增强及相互作用机理，探索原材料配比、工艺对纳米纤维素水凝胶复合材料性能的影响。考察该水凝胶在孔洞尺寸、外界温度、pH值、压力单因素及相互作用时的响应情况，尝试通过致孔剂、交联剂调控复合水凝胶的微观形态，以此控制复合水凝胶的刺激响应。本项目旨在改善传统水凝胶强度差和增强纤维分布不均的特性，研发出高强度高敏感型智能型水凝胶。研究成果可为该类水凝胶应用于药物控释方面提供理论基础和产业化开发依据。

中文关键词： 水凝胶；纳米纤维素；致孔剂；碳纳米管；

英文摘要： The conventional hydrogels usually have poor strength. The nanocellulose with narrow size distribution and structure determination through chemical mechanical preparation will used to reinforce the polyvinyl alcohol hydrogel on this study. The cross-linking method and freezing and thawing method will used to prepare the environment-sensitive hydrogel. The reinforce effect and interaction mechanism between properties of nanocellulose and polyvinyl alcohol hydrogel will be investigated by the use of FTIR, XPS, TEM and other means. The effect of raw material ratio, technology to the properties of nanocellulose hydrogel composite materials will be explored. The response of hydorgel in pore size, temperature, pH value, pressure of single factor and interaction will be investigated. In order to control the stimulus response, the pore-forming agent, cross-linking agent will be tried to control the microstructure of composite hydrogel. The project aims to improve the poor strength and uneven distribution of reinforced fiber of traditional hydrogel, and develop the hydrogel of high strength and high intelligence. The research results will lay the theoretical foundation for industrialization development of hydrogel which are applied on the drug controlled release.

英文关键词： hydrogels；cellulose nanofiber；porogen；multi-walled carbon nanotubes；