| 摘要: |
| 以氧化淀粉为起始原料，环氧氯丙烷和丙烯酸乙酯（EA）为改性剂，制得了交联-接枝双重改性淀粉基木材胶黏剂。实验结果表明，较好的交联改性条件为：环氧氯丙烷质量分数为4.0 %（相对于淀粉质量），氧化淀粉采用3∶2分步加料方式。正交试验得到的接枝改性条件为：过硫酸铵质量分数为0.2%，丙烯酸乙酯（EA）为10.0%，反应时间3 h，反应温度70 ℃。经过双重改性后，淀粉基木材胶黏剂的胶合强度（7.5 MPa）、耐水时间（48 h）和存储期（200 d）等指标可以达到GB/T 9846-2004标准要求。 |
| 关键词: 淀粉 木材胶黏剂 改性 环氧氯丙烷 丙烯酸乙酯 |
| DOI： |
| 分类号:TB484 |
| 基金项目:合肥工业大学校级大学生创新性实验计划(cxsy102146) |
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| Study on Synthesis of Crosslink and Graft Double-modified Wood Adhesives Based on Starch |
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ZHOU Qing, GUO Jia-neng, ZHANG Jing-jing, ZHANG Lei-na, LV Jian-ping
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Hefei University of Technology, Hefei 230009, China
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| Abstract: |
| Wood adhesives were prepared by crosslink and graft modification method with starch as raw materials, epichlorohydrin and ethyl-acrylate as chemical modifying agents respectively. Experiment results showed that the proper amount of epichlorohydrin was 4.0 wt%, and 60% starch should be put into reactor at starting and another 40% at interval of 2 h in the process of cross-linking. The optimum graft conditions determined by orthogonal design were as follows: ammonium persulfate 0.2wt%, ethyl-acrylate 10.0 wt%, reaction time 3h, reaction temperature 70 ℃. The wood adhesives has high bond strength（7.5 MPa）, good water-resistance（48 h）, stable storage stability（200 d）, which can meet the requirement of national standard GB/T 9846-2004. |
| Key words: starch wood adhesive modification epichlorohydrin ethyl-acrylate |
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