两亲SiO_(2)纳米颗粒的制备及提升聚合物性能  

Preparation of Amphiphilic SiO_(2)Nanoparticles and Improvement of the Polymer Properties

作　　者：贾寒[1] 田子豪 黄维安[1] JIA Han;TIAN Zihao;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,China)

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》2022年第4期17-20,50,共5页Research and Exploration In Laboratory

基　　金：国家自然科学基金项目(52174053);山东省自然科学基金项目(ZR2019MEE077);中国石油大学(华东)教学改革项目(KC-202009,SJ-202005)。

摘　　要：提出了一种两亲SiO_(2)纳米颗粒的制备方法,借助红外光谱及Zeta电位测试证实了相关基团在SiO_(2)纳米颗粒两侧成功接枝,探究了其对聚合物聚丙烯酰胺(HPAM)性能的影响。通过稳态和动态流变性测试发现,两亲性和亲水性的SiO_(2)纳米颗粒都可以增强聚合物溶液黏度和黏弹性。聚合物通过分子间作用力吸附在SiO_(2)纳米颗粒表面,形成复杂的三维网络结构,由于两亲SiO_(2)纳米颗粒的两侧非对称结构,其与HPAM分子间存在氢键、静电作用和疏水作用等多重相互作用,促使两亲SiO_(2)纳米颗粒比未修饰亲水SiO_(2)纳米颗粒在提升聚合物性能方面效果更为显著。进一步研究发现,与未修饰亲水SiO_(2)纳米颗粒相比,两亲SiO_(2)纳米颗粒能够在高温、高盐条件下使聚合物溶液具有更高的黏度保留率。A preparation method of amphiphilic SiO_(2)nanoparticles was introduced.The successful grafting of related groups on both sides of SiO_(2)nanoparticles was confirmed by infrared spectroscopy and Zeta potential test,and then the effect on the properties of polymer HPAM was investigated.Through steady and dynamic rheological tests,it is found that both amphiphilic and hydrophilic SiO_(2)nanoparticles can enhance the viscosity and viscoelasticity of polymer solution.The polymer is adsorbed on the surface of SiO_(2)nanoparticles by intermolecular force,and can form a complex three-dimensional network structure.Due to the asymmetric structure on both sides of the amphiphilic SiO_(2)nanoparticles,there are multiple interactions such as hydrogen bonding,electrostatic interaction and hydrophobic interaction between the amphiphilic SiO_(2)nanoparticles and HPAM molecules.These interactions make amphiphilic SiO_(2)nanoparticles have a more significant effect on improving polymer properties than unmodified hydrophilic SiO_(2)nanoparticles.Further study shows that amphiphilic SiO_(2)nanoparticles can make the polymer solution have higher viscosity retention rate at high temperature and high salt compared with unmodified hydrophilic SiO_(2)nanoparticles.

关 键 词：两亲SiO_(2)纳米颗粒 聚合物 流变性 分子间相互作用 

分 类 号：TE357[石油与天然气工程—油气田开发工程]