摘要
主要研究制备不同比例的硼酸和PVA凝胶,并测试其性能。实验结果表明,PVA一定量时,随着硼酸与PVA比例的增加,混合组分的pH逐渐降低;硼酸定量时,其pH变化不大。随着硼酸与PVA比例的增加,在一定范围内两者交联度增加,挺度增加,压缩强度也随之增大。当m(硼酸)m(PVA)<0.151时,凝胶吸水速率增加,越过这一范围吸水速率减小。两者比例越大,交联度越高,其吸水率越低。PVA水凝胶的吸水速率越高,对应的吸水率越高。PVA凝胶吸水率非常高,则固含量非常低。若硼酸与PVA的比例增大,交联度增大,固含量增加。硼酸与PVA的比值为0.151时可以得到韧性和吸水速率比较好的凝胶。
In this paper,boric acid and gels of PVA with different proportions were prepared,and their properties were tested. The results show that the pH value of the mixed component decreases with the increase of the ratio of boric acid/PVA. The p H value of boric acid changes little when the volume of boric acid is fixed. With the increase of the ratio of boric acid to PVA,the crosslinking degree,stiffness,and compression strength of boric acid and PVA increase within a certain range;when boric acid is less than 0. 15∶1,the water absorption rate of the gel increases;when the boric acid is less than 0. 15: 1,the water abosorption rate of the gel decreases. The higher the proportion is,the higher the crosslinking degree is,and the lower the water absorption rate is;the higher the water absorption rate of PVA hydrogel is,the higher the water absorption rate of PVA gel is,and the lower the solid content is. However,when the ratio of boric acid to PVA increases,the crosslinking degree increases,and the solid content increases. When the ratio of boric acid to PVA is 0. 15∶1,a gel with good toughness and water absorption rate can be obtained.
作者
姬春梅
JI Chunmei(Department of Chemical Engineering, Yulin Vocational and Technical College, YuLin, Shanxi 718100, China)
出处
《中州大学学报》
2019年第2期99-104,共6页
Journal of Zhongzhou University
关键词
压缩强度
吸水速率
交联度
固含量
韧性
compression strength
water absorption rate
crosslinking degree
solid content
toughness
