纤维素纳米纤丝/普鲁兰酶(Pul)体系对淀粉膜性能的影响研究

The effect of cellulose nanofibrils/ pullulanase (Pul) system on the performance of starch film

关键词:  淀粉  普鲁兰酶  纤维素纳米纤丝  淀粉膜  性能

Key Words:starch  pullulanase (Pul)  cellulose nanofibrils (CNF)  starch film  performance

摘要:本研究分析了纤维素纳米纤丝(CNF)/普鲁兰酶(Pul)体系对淀粉膜性能的影响。实验结果表明,CNF/Pul体系处理后的淀粉具有更高的短程有序性以及更多的双螺旋结构,且淀粉晶型中出现了B型特征峰。CNF/Pul体系处理后得到的淀粉膜具有很好的表面均匀性和机械性能,淀粉膜的拉伸强度从2.44 MPa增加到7.32 MPa,增加了200%。光/水蒸气透过率测试结果表明,CNF/Pul体系处理后的淀粉膜具有更好的光学透过率,且对水蒸汽阻隔性能有一定的增强作用。

Abstract:This study analyzed the effect of cellulose nanofibrils (CNF)/ pullulanase (Pul) system on the performance of starch film. It showed that the CNF/Pul treated starch exhibited higher short-range orderliness and more double helix structure, and there were additional B-type typical peaks existing in the treated starch. The obtained starch film with CNF/Pul treatment had good surface uniformity and better strength property. The tensile strength of starch film was increased from 2.44 MPa to 7.32 MPa, with a 200% increase. The test results of thermogravimetric analysis, light transmittance rate and vapour permeability showed that the obtained starch film with CNF/Pul treatment performed better thermal stability and optical transparency, and better vapour permeability as well.