摘要
为了提高物理交联聚乙烯醇(PVA)水凝胶的强度,制备了PVA无纺布复合水凝胶.当基体凝胶PVA质量分数为10%、无纺布体积分数为15%时,复合水凝胶的拉伸强度为5.90 MPa;随着基体凝胶PVA质量分数和无纺布体积分数的提高,复合凝胶的强度提高;当基体凝胶PVA质量分数为15%、无纺布体积分数为25%时,复合水凝胶的拉伸强度为10.90 MPa.利用A系数研究了不同PVA质量分数以及无纺布体积分数的复合水凝胶中基体与无纺布的界面作用,在无纺布体积分数相同时,界面强度随PVA质量分数的提高而增大;在基体凝胶PVA质量分数相同时,无纺布体积分数较低的复合凝胶的界面强度较大.复合水凝胶的结晶度低于纯水凝胶的结晶度.
Polyvinyl Alcohol （PVA） nonwoven fabrics were used for improving the mechanical strength of PVA hydrogels. When the mass fraction of PVA was 10% and volumetric fraction of nonwoven fabrics was 15 %, the tensile strength of the composite hydrogel reached 5.90 MPa. With the increase of the mass fraction of PVA gel and the volumetric fraction of the PVA nonwoven fabrics, the mechanical strength of the composite further increased. When the PVA mass fraction of the matrix was 15% and the volumetric content of nonwoven fabrics was 25%, the tensile strength attained 10.90 MPa. The interaction between the matrix and the PVA nonwoven fabrics was also studied through the coefficient ＂A＂ obtained from the results of the dynamic mechanical analysis （DMA）. Compared with the hydrogels, the fractions of PVA crstyal in the composite hydrogels are lowed.
出处
《北京理工大学学报》
EI
CAS
CSCD
北大核心
2007年第4期362-365,共4页
Transactions of Beijing Institute of Technology
关键词
聚乙烯醇
凝胶
无纺布
polyvinyl alcohol
hydrogels
nonwoven fabrics
