三乙醇胺改性羟丙基瓜胶溶液流变性能

以三乙醇胺改性羟丙基瓜胶为稠化剂，三异丙醇胺/乳酸/丙三醇有机锆为交联剂，获得了交联凝胶。研究了交联凝胶流变性能及改性羟丙基瓜胶溶液交联过程流变性能，获得了黏度和黏弹性模量随时间的变化关系，考察了温度对交联过程的影响；并首次应用核磁共振成像分析仪研究了静态交联过程溶液性能，获得了弛豫时间随时间的变化关系。结果表明，交联凝胶具有明显的黏弹性和触变性，携砂性能良好；三乙醇胺改性羟丙基瓜胶溶液交联过程中黏度及黏弹性模量随时间的变化曲线可用4-参数交联过程流变动力学模型描述； 4-参数静态交联过程动力学方程能较好地描述静态交联过程中弛豫时间随时间的变化关系，模型参数具有明确的物理意义。

Research on Rheological Properties of Triethanolamine Modified Hydroxypropyl Guar Gum Solution

A crosslinked gel was obtained by using triethanolamine-modified hydroxypropyl guar gum as a thickener, and triisopropanolamine/lactic acid/glycerol organic zirconium as a crosslinking agent. The rheology properties of the cross-linked gels and the crosslinking processes of triethanolamine-modified hydroxypropyl guar solution were studied. The viscosity and viscoelastic modulus varying with time in crosslinking process were obtained. The effects of temperature on the crosslinking process were investigated. The solution properties in static cross-linking processes were studied by NMR imaging analyzer, and the relationship of relaxation time varying with time was obtained. The results show that the gels demonstrate obvious viscoelasticity and thixotropy and have good sand-carrying properties. The viscosity and viscoelastic modulus of the modified solution varying with time during the crosslinking process can be described by 4-parameter crosslinking process rheokinetic equation. And 4-parameter static cross-linking process kinetic equation can better describe the relaxation time varying with time in static cross-linking process. The model parameters have clear physical meaning.