静电纺淀粉纳米纤维的交联改性研究

Studies on the crosslinking of electrospun starch nanofibers

通过静电纺丝技术制备纯淀粉纳米纤维膜,并在密闭容器中和戊二醛蒸汽进行交联。利用环境扫描电子显微镜(ESEM)、傅里叶变换红外光谱(FT-IR)对纤维交联前后的表面形貌和结构进行观察和分析,通过电子万能材料拉伸试验机、接触角测试仪等考察了交联反应对纤维膜性能的影响。结果表明,戊二醛与淀粉分子之间发生了缩醛化交联反应,淀粉纳米纤维膜经戊二醛蒸汽交联后仍能较好的保留原纤维的形态,并且拉伸性能和耐水性能均得到一定程度的提高。

The starch nanofiber mats were prepared by electrospinning,and crosslinked by deal with glutaraldehyde vapor in a sealed containers.The morphology and structure of the fibers(before and after crosslinking)were characterized by SEM and FT-IR,and the properties of the product were measured by tensile test and contact angle measurements.Test results show that,acetalization reaction occurred between the intermolecular of glutaraldehyde and starch,the morphology of crosslinked fibers can be grossly preserved compared with the uncrosslinked starch fibers,and tensile properties and water resistance of the fiber mats have been greatly improved after glutaraldehyde crosslinking.