糊化预处理对淀粉基木材胶特性的影响研究

Effects of Gelatinization Pretreatment on the Performance of Starch-Based Wood Adhesive

DOI：10.3969/j.issn.1673-1689.2012.08.009

中文关键词: 淀粉 木材胶 糊化预处理 胶接性能 耐低温储藏性

英文关键词: starch wood adhesive gelatinization pretreatment bonding characteristics freeze-thaw stability

基金项目:江苏省科技支撑(工业)计划项目(BE2011015);2011年度高校科研成果产业化推进项目(JHB2011-28)

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中文摘要:

研究了糊化预处理对淀粉胶剪切强度和低温储藏稳定性的影响。对比没有经过糊化预处理的淀粉胶,经过糊化预处理的淀粉胶的干强度提高了20.9%,湿强度提高了45.8%。耐低温稳定性实验证明糊化预处理可以增加淀粉胶通过冷藏-解冻循环的次数。动态时间扫描实验和XRD实验的结果证明了糊化预处理有利于削弱淀粉分子之间的氢键作用力,促进淀粉与单体之间发生接枝反应,致使接枝率提高了43.5%,接枝百分率提高了38.8%,显著提高了反应的接枝参数,从而改善了淀粉胶的粘结性能及结构稳定性。

英文摘要:

The gelatinization pretreatment of starch were used to improve the performance of of renewable starch-based wood adhesive in this study.Compared with starch-based wood adhesive without gelatinization pretreatment of starch,the bonding strength of starch-based wood adhesive with gelatinization pretreatment of starch increased by 20.9% and 45.8% in dry-state and wet-state,respectively.Result of freeze-thaw stability measurement indicated that the gelatinization pretreatment of starch could effectively improve the frost resistance of starch-based wood adhesive.The results of dynamic time sweep experiments and XRD analysis demonstrated that the gelatinization pretreatment of starch could weaken intermolecular hydrogen bonds of starch,and enhance the grafted reaction of starch and VAc monomer.The grafted parameters was also remarkably increased by the gelatinization pretreatment of starch,such as G increased by 43.5% and GE increased by 38.8%.Therefore,the gelatinization pretreatment of starch enhanced structural stability and bonding capacity of renewable starch-based wood adhesive.

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