交联_接枝双重改性淀粉基木材胶黏剂合成的研究.pdfVIP

17 交联接枝双重改性淀粉基木材胶黏剂的合成研究 周庆, 郭佳能, 张京京, 张雷娜, 吕建平 ( , 230009) : 以氧化淀粉为起始原料, 环氧氯丙烷和丙烯酸乙酯( EA) 为 性剂, 制得了交联接枝双重 性淀粉基木 材胶黏剂实验结果表明, 较好的交联 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32 分步加料方式正交试验得到的接枝 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 性后, 淀粉基木材胶黏剂的胶合强度(7.5 M Pa) 耐水时 间(48 h) 和存储期(200 d) 等指标可以达到GB/ 9846- 2004 标准要求 : 淀粉; 木材胶黏剂; 性; 环氧氯丙烷; 丙烯酸乙酯 : B484 : A : 2011) Studyon SynthesisofCrosslink andGraftDoublemodifiedWoodAdhesives Based on Starch ZH O U Qi ng , G UO J i aneng , ZH A N G J ingj i ng , ZH A N G L eina , L V J ianp i ng (H efei University of echnology, H efei 230009, China) Abstract: Wood adhesives w ere prepared by crosslink and graft modificat ion method w ith starch as raw mat eri als, epichlorohydrin and ethylacrylate as chemical modifying agents respectively. Experiment results showed that the proper amount of epichlorohydrin was 4. 0 w t% , and 60% starch should be put into reactor at starting and another 40% at interval of 2 h in the process of crosslinking. he optimum graft conditions determined by orthogonal design were as follows: ammonium persulfate 0. 2w t% , ethylacrylate 10.0 wt% , reaction time 3h, reaction temperature 70 . he w ood adhesives has high bond strengt h( 7.5 MPa) , good w aterresistance( 48 h) , stable st orage stability(200 d) , w hich can meet the requirement of national standard GB/ 9846- 2004. Key words: starch; w ood adhesive; modification; epichlorohydrin; ethylacrylate [ 1- 2] , , , , , , [ 3] , [ 4]