新型铸造用淀粉/膨润土复合粘结剂的红外研究

doi:10.3964/j.issn.1000-0593(2009)02-0355-03

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摘要：以木薯淀粉为主要原料，自行研制的有机膨润土为改性剂，经过熔融和溶液插层等工艺制备木薯淀粉/膨润土复合粘结剂。采用FTIR和XRD手段表征及力学性能测试。结果表明，PVA插层改性后的有机膨润土的层间距大于有机膨润土的层间距大于Na基膨润土的层间距，膨润土的层间距越大，越有利于淀粉与膨润土的插层反应，得到的复合粘结剂的干强度也越高。该复合粘结剂具有粘结强度高、抗吸潮性好，且成本低、工艺简单和环境友好。

关键词：木薯淀粉;膨润土;铸造用粘结剂

Abstract：Tapioca starch was used as the main material and self-developed organic-bentonite used as the modifier to make tapioca starch/bentonite composite binder by melting and solution intercalation technologies. The binder was characterized by means of FTIR, XRD and mechanical performance test. The results showed that the interlamellar spacing of improved organic bentonite was larger than that of organic bentonite and Na-bentonite, and the more the interlayer spacing of bentonite, the more advantageous the binder to the intercalation reaction between starch and bentonite, leading to higher dry tensile strength. The nanometer composite binder also features high bond strength, good humidity resistance, low costs and simple process, and is environment-friendly.

Key words：Tapioca starch;Bentonite;Casting binder

收稿日期: 2007-10-06 修订日期: 2008-01-12

中图分类号:

O433

通讯作者: 郑玉婴 E-mail: yyzheng@fzu.edu.cn

引用本文:

程雷,陈玉琳,郑玉婴^*. 新型铸造用淀粉/膨润土复合粘结剂的红外研究[J]. 光谱学与光谱分析, 2009, 29(02): 355-357.
CHENG Lei,CHEN Yu-lin,ZHENG Yu-ying^*. FTIR Research on New Kind of Tapioca Starch/Bentonite Composite Casting Binder. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2009, 29(02): 355-357.

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