改性魔芋葡甘聚糖纳米晶对聚乙烯醇薄膜性能的影响

doi:10.19491/j.issn.1001-9278.2020.05.007

中国塑料 ›› 2020, Vol. 34 ›› Issue (5): 38-44.DOI: 10.19491/j.issn.1001-9278.2020.05.007

改性魔芋葡甘聚糖纳米晶对聚乙烯醇薄膜性能的影响

陈秀玲, 高山俊(), 沈春晖, 齐宏生, 刘洒文

武汉理工大学材料科学与工程学院, 武汉 430070

收稿日期:2019-12-16 出版日期:2020-05-26 发布日期:2020-05-26

Effect of Modified Konjac Glucomannan Nanocrystals on Properties of Poly(vinyl alcohol) Film

Xiuling CHEN, Shanjun GAO(), Chunhui SHEN, Hongsheng QI, Sawen LIU

School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China

Received:2019-12-16 Online:2020-05-26 Published:2020-05-26
Contact: Shanjun GAO E-mail:sjgao@whut.edu.cn

摘要/Abstract

摘要：

通过硫酸水解魔芋葡甘聚糖（KGM）得到魔芋葡甘聚糖纳米晶（NKGM），再表面接枝3?(三甲氧基硅丙基)十八烷基氯化铵，与壬基酚聚氧乙烯醚硫酸钠反应等过程得到改性KGM纳米晶类流体(NKGMf)；然后采用溶液流延法制备了含NKGM和NKGMf的聚乙烯醇（PVA）薄膜；通过傅里叶变换红外光谱仪、透射电子显微镜、扫描电子显微镜、热失重分析仪、拉伸测试仪等对NKGM、NKGMf的结构和PVA薄膜的性能进行表征。结果表明，经改性后，NKGM的片状结构得以保留，在PVA基质中的分散性增加，薄膜的起始分解温度提高了23 ℃，拉伸强度提高了34.7 %，其中，NKGMf的最佳含量为3 %（质量分数，下同）。

关键词: 魔芋葡甘聚糖纳米晶, 纳米类流体, 聚乙烯醇, 力学性能

Abstract:

Konjac glucomman (KGM) nanocrystals were prepared by a hydrolysis reaction of KGM with sulfuric acid and then was modified by surface grafting with 3?(trimethoxysilylpropyl) octadecylammonium chloride and then by ion?exchanging with nonylphenol polyoxyethylene ether sodium sulfate to obtain a KGM nanocrystal fluid. The poly(vinyl alcohol)?based composite films containing different concentrations of KGM nanocrystals and their fluid were prepared by a solution?casting method, and their structures and properties were investigated by Fourier?transform infrared spectroscopy, transmission electron microscopy, scanning electron microscopy, thermogravimetric analysis, and tensile test. The results indicated that the structure of KGM nanocrystals was not destroyed after surface modification, and their fluid was uniformly dispersed in the PVA matrix. The composite films achieved an improvement in initial decomposition temperature by 23 °C and in tensile strength 34.7 % when 3 wt% of KGM nanocrystal fluid was incoporated.

Key words: konjac glucomman nanocrystal, nanofluid, poly(vinyl alcohol), mechanical property

中图分类号:

TQ325.9

陈秀玲, 高山俊, 沈春晖, 齐宏生, 刘洒文. 改性魔芋葡甘聚糖纳米晶对聚乙烯醇薄膜性能的影响[J]. 中国塑料, 2020, 34(5): 38-44.

Xiuling CHEN, Shanjun GAO, Chunhui SHEN, Hongsheng QI, Sawen LIU. Effect of Modified Konjac Glucomannan Nanocrystals on Properties of Poly(vinyl alcohol) Film[J]. China Plastics, 2020, 34(5): 38-44.

图/表 10

图1 NKGMf的制备过程

Fig.1 Preparation scheme of NKGMf

图2 KGM和NKGM的SEM照片

Fig.2 SEM of KGM and NKGM

图3 KGM和NKGM的XRD曲线

Fig.3 XRD patterns of KGM and NKGM

图4 NKGM和NKGMf的TEM照片

Fig.4 TEM of NKGM and NKGMf

图5 NKGM、DC5700接枝的KGM纳米晶、NKGMf的FTIR谱图

Fig.5 FTIR spectra of NKGM ,DC5700 grafted konjac nanocrystals and NKGMf

图6 NKGM和NKGMf的TG曲线

Fig.6 TG curves of NKGM and NKGMf

图7 NKGMf的流变性能曲线

Fig.7 Rheological properties of NKGMf

图8 NKGM和NKGMf的含量对薄膜力学性能的影响

Fig.8 Mechanical properties of films against different contents of NKGM and NGMGf

图9 不同NKGM和NKGMf含量的PVA薄膜表面的SEM照片

Fig.9 SEM of the surface of the composite film with different additions of NKGM and NKGMf

图10 PVA/NKGMf薄膜的TG曲线

Fig.10 TG curves of PVA/NKGMf composite films

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改性魔芋葡甘聚糖纳米晶对聚乙烯醇薄膜性能的影响

Effect of Modified Konjac Glucomannan Nanocrystals on Properties of Poly(vinyl alcohol) Film

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