聚乙烯醇/壳聚糖共混纤维毡的制备与表征

将不同质量比的聚乙烯醇(PVA)和壳聚糖(CS)溶于甲酸中配制成共混溶液进行静电纺丝,得到PVA/CS共混纤维毡。对纤维毡进行原子力显微镜(AFM)表征、红外光谱分析和吸水性能测试。结果表明:共混溶液中PVA质量分数为8%,CS质量分数为4%时,静电纺丝效果较好,纤维光滑平直,平均直径为307 nm,;红外光谱分析表明,PVA和CS共混时,大分子之间产生了较强的氢键作用,CS原有的结晶结构在一定程度上被破坏;PVA/CS共混纤维毡的吸水量和吸水速率都小于PVA纤维毡。

Preparation and characterization of polyvinyl alcohol/chitosan blend fiber felt

The blend solution of polyvinyl alcohol (PVA) and chitosan (CS) dissolving in formic acid at different mass ratios was spun into PVA/CS blend fiber felt via electrospinning process.The PVA/CS blend fiber felt was studied by atomic force mi- croscopy (AFM),infrared spectrum analysis and water absorption test.The results showed that the electrospinning effect was fairly good and the fiber was smooth and straight with the average diameter of 307 nm when the mass fractions of PVA and CS were 8% and 4% in the blend solution,respectively.The IR spectrum analysis showed that the strong hydrogen bending interac- tion occured between macromolecules and the original crystalline structure of CS was destroyed in some degree as PVA was blen- ded with CS.The PVA/CS blend fiber felt had the water absorption capacity and rate both lower than PVA fiber felt.