摘要
以壳聚糖和聚乙烯醇（PVA）为原料,制备得到了具有大孔结构的凝胶支架。研究了PVA的添加量、凝胶温度对凝胶形成时间和凝胶强度的影响,以及时间对凝胶强度的影响,并对凝胶的结构进行了表征。研究结果表明,随着PVA添加量的增加,凝胶时间延长,凝胶强度出现最大值;随着凝胶温度的升高,凝胶时间和强度逐渐减小,并且随着时间的延长,凝胶强度明显增加。凝胶具有不均匀的空隙结构并呈现明显的微相分离,孔径分布在100-500μm,PVA片均匀地分散在壳聚糖基质中。
The macroporous gel scaffolds were prepared by chitosan and polyvinyl alcohol（ PVA）. The effects of addition amount of PVA and temperature on forming time and strength of gel, and the impact of time on gel strength were discussed in detail. The gel structure was also characterized by SEM. The results show that with the increase of PVA content, the gel time increases and gel strength has a maximum value, while with the increase of temperature, time and intensity of gel decrease gradually. The gel strength also increases significantly with the extension of time. The gel has inhomogeneous void structure and obvious microphase separation, the pore size distribution is between 100- 500 μm and sheet PVA uniformly disperse in the chitosan matrix.
出处
《煤炭与化工》
CAS
2015年第12期22-24,139,共4页
Coal and Chemical Industry
基金
陕西省自然科学基金(2015JQ2054)
