聚丙烯酸／细菌纤维素复合凝胶的制备与性能

通过在聚丙烯酸（PAA）聚合过程中添加细菌纤维素（BC），制备PAA／BC复合凝胶，并研究无机填料蒙脱土（MMT）、硅藻土对PAA／BC复合凝胶的影响．结果表明：PAA／BC复合凝胶与PAA凝胶相比，吸水性能及保水性能均有一定程度的提高，BC用量为0．4％N，该复合凝胶的吸水及保水性能综合最佳．添加MMT、硅藻土的PAA／BC复合凝胶的吸水及保水性能均有提高，同样用量的MMT对凝胶的吸水性能提高更明显，而硅藻土对凝胶的保水性能提高更明显．SEM的微观结构分析验证了上述结果．

Preparation and Properties of PAA/BC Compound Gel

During the polymerization process of polyacrylic acid （PAA）, by adding bacterial cellulose （BC）into the PAA, the PAA/BC compound gel was prepared. Meanwhile, the effects of inorganic filler such as montmorillonoid （MMT）and diatomite on the properties of PAA/BC compound gel were investigated. The influences of BC content on the water absorption and retention capacity of the compound gel were evaluated. The results show that in comparison with PAA gel, the water absorption and retention capacity of PAA/BC compound gel is enhanced. When the BC content is around 0.4%, the PAA/BC compound gel is the best in overall properties of water absorption and retention capacity. Containing inorganic filler MMT or diatomite, it can enhance the water absorption and retention capacity of PAA/BC compound gel. Under the conditions of the same inorganic filler content, the PAA/BC/MMT compound gel is modified more obviously in water absorption capacity, and the PAA/BC/diatomite compound gel is modified more outstanding in water retention capacity. The above results are verified with the SEM microstructure analysis.