糊精胶黏剂的制备与改性研究

文璞山; 宗迅成; 何维; 何庆畅; 肖细梅

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糊精胶黏剂的制备与改性研究
文璞山^1,2, 宗迅成³, 何维³, 何庆畅³, 肖细梅³
1. 湖南工业大学，株洲 412007;2. 遵义师范学院，遵义 563002;3.湖南工业大学，株洲 412007

摘要:

目的合成一种耐水性良好、流动性高的包装用改性糊精胶黏剂（MDA）。方法以糊精、三羟甲基三聚氰胺（TMM）和硼砂为原料，利用交联共聚的方法制备MDA。分别研究三羟甲基三聚氰胺、糊精和硼砂的配比及交联温度等4个变量对MDA的耐水性、干燥速率、初粘力、固含量和黏度等5个性能指标的影响。结果当硼砂质量分数为0.8%， TMM质量分数为16%，交联温度为90 ℃时， MDA的耐水性达123 h以上。通过红外光谱分析证实了TMM与糊精发生了交联反应，生成了MDA的结构。结论利用TMM交联改性糊精，提高了胶黏剂的耐水性与粘结强度，所得的改性糊精胶黏剂可用于瓦楞纸板的粘合。

关键词: 糊精三羟甲基三聚氰胺胶黏剂耐水性

DOI：

分类号:TB484.3

基金项目:湖南省自然科学基金（2015JJ3063）；湖南工业大学自然科学研究项目（2014HZX01）；湖南工业大学校级大学生研究性学习和创新性实验计划（2014）

Preparation and Modification of Dextrin Adhesive

WEN Pu-shan^1,2, ZONG Xun-cheng³, HE Wei³, HE Qing-chang³, XIAO Xi-mei³

1. Hunan University of Technology， Zhuzhou 412007， China;2. Zunyi Normal College， Zunyi 563002， China;3.Hunan University of Technology， Zhuzhou 412007， China

Abstract:

This research aimed to synthesize a modified dextrin adhesive (MDA) with good water resistance and high fluidity for packaging application. The MDA was prepared with dextrin borax and trimethylol melamine (TMM) as raw materials by cross-linking polymerization. The five performance indicators including water resistance, drying rate, initial adhesion, solid content and viscosity of MDA were investigated by changing variables such as the cross-linking temperature, the ratio of TMM, dextrin and borax separately. The TMM improved the water resistance and adhesive strength when the MDA consisted of 0.8% borax and 16% TMM at the cross-linking temperature of 90 ℃, which showed water resistance was up to 123 h. The cross-linking between TMM and dextrin, as well as the structure of MDA was confirmed by FT-IR. The water resistance and viscosity of MDA was improved by crosslinking with TMM and the MDA can be used for corrugated board bonding.

Key words: dextrin trimethylol melamine adhesive water resistance