文档介绍：
淀粉/单体比例及酸解条件对高淀粉含量木
材胶性能的影响#
郭海南1,程力1,2,3,李兆丰1,2,3,洪雁1,2,3,顾正彪1,2,3**
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(1. 江南大学食品学院,无锡 214122;
2. 江南大学食品科学与技术国家重点实验室,无锡 214122;
3. 食品安全与营养协同创新中心,无锡 214122)
摘要:研究了淀粉与单体质量比对淀粉木材胶粘结性能、接枝参数、贮藏稳定性的影响,结
果表明当淀粉/单体为 7:3 时,较常规比例(淀粉/单体为 5:5)下接枝率、接枝效率与干强度
分别下降 %、%和 %,经受冻融循环减少 4 次,但淀粉用量提高了 40%,大大
改善了环保性能。在此基础上,研究了酸解条件对淀粉/单体为 7:3 的木材胶性能的影响,综
合考虑贮藏稳定性、粘结强度,选择酸解时间为 2h 制备高淀粉含量木材胶,并对酸解作用
影响淀粉胶性能及接枝共聚反应的机理进行了分析。
关键词:玉米淀粉;醋酸乙烯酯;酸解;剪切强度;接枝共聚
中图分类号:
Effects of Starch/VAc Monomerratio and Acidolysis
Condition on Wood Adhesive Contains Large Amounts of
Starch
GUO Hainan1, CHENG Li1,2,3, LI Zhaofeng1,2,3, HONG Yan1,2,3, GU Zhengbiao1,2,3
(1. School of Food Science and Technology, Jiangnan University, Wuxi 214122;
2. The State Key Laboratory of Food Science and Technology, Wuxi 214122;
3. Synergetic Innovation Center Of Food Safety and Nutrition, Wuxi 214122)
Abstract: The effects of starch/VAc(vinyl acetate) monomerratio on the shear strength, grafted
parameter and storage stability of starch-based wood adhesive were studied. It was shown that,
although the graft percentage, graft efficiency and dry shear strength of the starch adhesive
produced when the starch/VAc monomerratio is 7:3, respectively decreased by %, % and
% , undergo freeze-thaw cycle four times less pared with the conventional
proportional (starch/VAc monomerratio is 5:5), the amount of starch was increased by 40% which
significantly improved the environmental performance, so the starch/VAc monomerratio was
selected as 7:3. And then acidolysis condition on the characteristics of wood adhesive contains
large amounts of starch were studied. Comprehensive study of storage stability and bond strength,
select acid hydrolysis time was 2h. Then on this basis, the wood adhesive contains large amounts
of starch was prepared. The action mechanism of acidolysis on characteristics of starch adhesive
and graft copolymerization reaction was an