芥酸酰胺丙基二甲基叔胺改性纤维素溶液的 流变性能与交联性能

Rheological Properties of Erucamidopropyl Dimethylamine Modified Carboxymethyl Hydroxyethyl Cellulose Solutions

樊 悦 金 浩 方 波 卢拥军 邱晓惠 孙 瑞

FAN Yue JIN Hao FANG Bo LU Yongjun QIU Xiaohui SUN Rui

为了改善纤维素溶液的增稠能力和交联性能，合成了一种新型疏水醚化改性剂（3-氯-2-羟丙基芥酸酰胺醋酸铵），并采用该改性剂对羧甲基羟乙基纤维素（CMHEC）进行疏水改性，首次制得了芥酸酰胺丙基二甲基叔胺疏水改性纤维素（ED-CMHEC），研究了CMHEC和ED-CMHEC溶液的流变性能（表观黏度、流动曲线、触变性和黏弹性）和交联性能。研究结果表明，改性后ED-CMHEC溶液的表观黏度得到显著提升并表现出更显著的触变性与黏弹性。质量分数0.3%的 CMHEC和ED-CMHEC 溶液在30℃、170 s-1的表观黏度分别为18 mPa·s和71mPa·s，后者较前者提高了2.94倍。不同质量分数（0.3%~0.5%）的CMHEC和ED-CMHEC溶液均表现出剪切变稀性质，其流动曲线可用Cross模型进行描述。有机锆交联剂FAC-201加量为0.2%时，质量分数0.3% ED-CMH EC溶液交联形成凝胶的黏度是改性前的2.4倍，表现出更强的交联性能。图9表4参22

To improve the thickening ability and crosslinkingperformance of cellulose，widen its application in fracturing fluid field，a new kind of hydrophobic etherifying agent（3-chloro -2-hydroxypropylerucylamideammonium acetate was prepared to modify carboxymethyl hydroxyethyl cellulose （CMHEC）. Hydrophobic erucamidopropyl dimethylamine carboxymethyl hydroxyethyl cellulose （ED-CMHEC） was first prepared. The rheological and crosslinking experiments of CMHEC and ED-CMHEC were carried out. The results showed that ED-CMHEC solutions exhibited higher viscosities，more apparent thixotropy and viscoelasticity，compared to CMHEC solution. At the mass fraction of 0.3% ，the viscosity of CMHEC and ED-CMHEC solutions at the temperature of 30℃ and at the shearing rate of 170 s-1were 18.0 mPa·s and 71 mPa·s，respectively. The shear thinning behaviors of CMHEC and ED-CMHEC solutions at different concentrations could be well described by Cross model. Under the same crosslinking conditions that the dosage of zirconium organic crosslinker was 0.2%，the viscosity of gel formed by 0.3% ED-CMHEC solution was 2.4 times than that by 0.3% CMHEC solution，which indicated that ED-CMHEC had a stronger crosslinking performance.

10.19346/j.cnki.1000-4092.2019.02.004