以丙烯酸镁为主液、过硫酸铵-三乙醇胺为氧化还原体系,研究加入不同量的羟乙基纤维素对凝胶体固化时间、失水收缩率、遇水膨胀率、干湿循环、冻融循环、抗压强度等的影响。结果表明,加入羟乙基纤维素后,凝胶体固化时间大大缩短,且羟乙基纤维素质量分数越大固化时间越短;随着羟乙基纤维素质量分数的增加凝胶体失水收缩率减小,当羟乙基纤维素质量分数为15%时效果最好,收缩率为35.96%,比对照组的收缩率降低了11.61%。

Using magnesium acrylate as the main liquid and ammonium persulfate-triethanolamine as the redox system,the effects of the dosage of hydroxyethyl cellulose (HEC) on gel curing time,shrinkage rate after losing water,water swelling rate,wet-dry cycle,freeze-thaw cycle and compressive strength are studied.The results show that the curing time of gel is greatly shortened due to the addition of HEC.The higher the mass fraction of HEC,the shorter the curing time and the smaller the shrinkage rate of gel after losing water.The best effect is obtained when the content of HEC is 15%.The shrinkage rate is 35.96%,which is 11.61% lower than that of the control group.

谷亚新(1969-),女,硕士,教授,主要从事高分子防水材料的研究,1594750270@qq.com。