SiO_(2)纳米颗粒/蠕虫状胶束混合体系流变性能研究  

Investigation on Rheological Properties of SiO_(2) Nanoparticle/Wormlike Micelles Mixtures

作　　者：贾寒[1] 黄文健 陈德春[1] 黄维安[1] JIA Han;HUANG Wenjian;CHEN Dechun;HUANG Weian(Key Laboratory of Unconventional Oil&Gas Development,Ministry of Education,School of Petroleum Engineering,China University of Petroleum(East China),Qingdao 266580,Shandong,C ina)

机构地区：[1]中国石油大学(华东)石油工程学院,非常规油气开发教育部重点实验室,山东青岛266580

出　　处：《实验室研究与探索》2021年第6期48-53,共6页Research and Exploration In Laboratory

基　　金：山东省自然科学基金(ZR2019MEE077);中国石油大学(华东)教学改革项目(KC-202009,ZY-202004,SJ-202005)。

摘　　要：研究了亲水和疏水SiO_(2)纳米颗粒对油酸钠/碳酸钠蠕虫状胶束溶液流变性的影响。疏水纳米颗粒的加入显著增强了溶液的黏弹性;而亲水纳米颗粒则几乎没有效果。Maxwell模型计算结果表明,纳米颗粒与胶束形成交联而促进胶束轮廓长度的增加是疏水纳米颗粒提高溶液黏弹性的主要原因。考察了不同纳米流体的Zeta电位,结果显示纳米颗粒与表面活性剂分子之间的相互作用是形成颗粒-胶束交联结构的关键原因,直接决定着纳米颗粒提高溶液黏弹性。从数学模型计算结果来看,疏水纳米颗粒浓度越高,体系中交联结构的数目也越多,该结果与疏水纳米颗粒对溶液黏弹性的作用一致。The effects of both hydrophilic and hydrophobic SiO_(2) nanoparticles on the viscoelasticity of sodium oleate/sodium carbonate wormlike micelles(WLMs) solutions were investigated. The additional hydrophobic nanoparticles significantly enhances the rheological properties of solutions, while hydrophilic nanoparticles has almost no effect. The Maxwell model calculation result shows that the formation of micelle-nanoparticle junction promoted the micellar contour length is the main cause for hydrophobic nanoparticles to improve the viscoelasticity of solution. The Zeta potential measurements of different nanofluids are conducted, and the results indicate that the interactions between nanoparticles and surfactant molecules control the formation of micelle-nanoparticle junction, which directly determined the effect of nanoparticles on improving WLMs viscoelasticity. Based on the result of mathematical model calculation, the higher the concentration of hydrophobic nanoparticles generates more micelle-nanoparticle junctions, whichis consistent with the effect of hydrophobic nanoparticles on the viscoelasticity of WLMs solution.

关 键 词：SiO_(2)纳米颗粒 蠕虫状胶束 黏弹性 交联结构 

分 类 号：O648[理学—物理化学]