三偏磷酸钠交联黄原胶的制备及其溶液流变性  

Synthesis of Sodium Trimetaphosphate Crosslinked Xanthan Gum and Rheological Properties of Its Aqueous Solution

作　　者：刘茹[1] 李海平[1] 侯万国[1,2] 

机构地区：[1]山东大学国家胶体材料工程技术研究中心,济南250100 [2]山东大学胶体与界面化学教育部重点实验室,济南250100

出　　处：《应用化学》2015年第9期1061-1069,共9页Chinese Journal of Applied Chemistry

基　　金：国家自然科学基金项目(21173135和21403128)资助~~

摘　　要：以三偏磷酸钠（STMP）为交联剂,合成了水溶性低交联度黄原胶（XG）,依据其溶液粘度优化出了最佳合成条件;考察了电解质质量分数、p H值及温度对STMP交联黄原胶（简记为SP-c-XG）溶液流变性的影响,并与XG溶液进行了对比。结果表明,在所研究的电解质（Na Cl和Ca Cl2）质量分数（0~5.0%）、p H值（2~11）和温度（20~70℃）范围内,SP-c-XG和XG溶液的流变曲线均为假塑型,符合Herschel-Bulkley模型;其屈服值、表观粘度和动力学模量随电解质质量分数增大均先下降后上升,而随p H值的升高先升高后降低,随温度升高而降低。SP-c-XG和XG溶液具有相似的流变性,但与XG溶液相比,SP-c-XG溶液具有更高的屈服值和表观粘度,特别是具有更强的弹性和耐温性,在油田强化采油领域具有重要应用前景。A water-soluble weakly crosslinked xanthan gum（XG） was synthesized using sodium trimetaphosphate（STMP） as a crosslinker, and the synthesis conditions were optimized based on the viscosity of the STMP crosslinked XG（denoted as SP-c-XG） solutions. Effects of electrolyte（NaCl and CaCl2） mass fraction（0~5.0%）, pH（2~11）, and temperature（20~70 ℃） on the rheological properties of the SP-c-XG solutions were investigated and compared with those of XG solutions. The results show that, under the studied conditions, the rheological curves of both SP-c-XG and XG solutions are pseudoplastic and can be described by Herschel-Bulkley model. The yield stress, apparent viscosity and dynamic moduli of the SP-c-XG and XG solutions initially decrease and then increase with increasing electrolyte concentration, but they initially increase and then decrease with increasing pH. Increasing temperature results in a decrease in these rheological parameter values for both SP-c-XG and XG solutions. The rheological properties of the SP-c-XG solution are similar to those of the XG solution. However, compared with the XG solution, the SP-c-XG solution exhibits higher yield stress and apparent viscosity, especially stronger elasticity and temperature resistance, indicating its use potential in enhanced oil recovery.

关 键 词：黄原胶 三偏磷酸钠 交联 流变性 抗温性 

分 类 号：O648[理学—物理化学]