聚乙烯醇/海藻酸钠共混液的静电纺丝

Electrospinning of PVA/sodium alginate acid blend

由于纯海藻酸钠难以用于静电纺丝，研究了聚乙烯醇（PVA）与海藻酸钠共混溶液的静电纺丝工艺。将8％的PVA水溶液与2％的海藻酸钠水溶液分别以体积比9：1、8：2、7：2,6：4、5：5的比例混合。结果表明：共混溶液体积比为6：4时纺丝效果较好，纤维膜成形良好，直径分布均匀，为80—110nm。经氯化钙交联后，纤维膜抗水解能力、断裂伸长和断裂强力提高，断裂强力增加了98．5％，断裂伸长提高了104．3％。

As pure sodium alginate is difficult to be electrnspun, electrospinning of the polyvinyl alcohol （PVA） and alginate mixed solution is studied. The 8% PVA solution with 2% aqueous solution of sodium alginate are mixed in a volume ratio of 9 ： 1, 8 ： 2, 7 ： 2, 6 ： 4, 5 ： 5 respectively. The results show that when the volume ratio of solution of PVA to sodium alginate is 6 ： 4, the spinning effect is better, fiber membrane formation is good and the diameter distribution is uniform of 80-110 nm. After cross linking with calcium chloride, the performance of hydrolysis resistance, elasticity and breaking strength of the fiber film can be improved with breaking streugth increased by 98.5% and breaking elongation increased by 104.3%.