Hu Xu, Ke Yangchuan, Zhao Yi, Yu Chengcheng, Lu Shichao, Peng Fangfang
CNPC Nanochemistry Key Laboratory, College of Science, China University of Petroleum Beijing 102249 China
RSC Adv. 2018 Aug 29;8(53):30491-30501. doi: 10.1039/c8ra05120h. eCollection 2018 Aug 24.
In this paper, β-cyclodextrin was successfully modified by maleic anhydride under certain experimental conditions. A novel water-soluble nanocomposite (AAMC-S1) consisting of nano-SiO was synthesized by free-radical polymerization using acrylamide (AM), 2-acrylamido-2-methyl propane sulfonic acid (AMPS) and modified β-cyclodextrin (MAH-β-CD) as raw materials. The characterization of AAMC-S1 was measured by Fourier transform infrared spectroscopy (FT-IR), H nuclear magnetic resonance spectroscopy (H NMR), thermal degradation (TGA) and scanning electron microscopy (SEM). In the performance evaluation experiments, the AAMC-S1 nanocomposite demonstrated desirable properties in terms of its thickening ability, temperature resistance, salt tolerance and shear resistance compared to those of the pure polymer AM/AMPS/MAH-β-CD (denoted AAMC-S0). Desirable properties could be attributed to the introduction of inorganic nano-SiO, which endowed the AAMC-S1 structure with rigidity and made the network structure denser and stronger. Based on the indoor displacement test, the AAMC-S1 nanocomposite gave a resistance factor (RF) of 22.31 and a residual resistance factor (RFF) of 5.58, compared with 17.71 and 2.73 for AAMC-S0. The enhanced oil recovery test showed that AAMC-S1 could remarkably enhance 13.25% of oil recovery while AAMC-S0 could enhance 7.12% of oil recovery. These behaviors made this novel nanocomposite promising in enhancing oil recovery.
在本文中，在特定实验条件下，马来酸酐成功修饰了β-环糊精。以丙烯酰胺（AM）、2-丙烯酰胺基-2-甲基丙磺酸（AMPS）和修饰后的β-环糊精（MAH-β-CD）为原料，通过自由基聚合反应合成了一种由纳米SiO组成的新型水溶性纳米复合材料（AAMC-S1）。采用傅里叶变换红外光谱（FT-IR）、氢核磁共振光谱（H NMR）、热降解（TGA）和扫描电子显微镜（SEM）对AAMC-S1进行了表征。在性能评价实验中，与纯聚合物AM/AMPS/MAH-β-CD（记为AAMC-S0）相比，AAMC-S1纳米复合材料在增稠能力、耐温性、耐盐性和抗剪切性方面表现出理想的性能。理想的性能可归因于无机纳米SiO的引入，它赋予了AAMC-S1结构刚性，使网络结构更致密、更强。基于室内驱替试验，AAMC-S1纳米复合材料的阻力系数（RF）为22.31，残余阻力系数（RFF）为5.58，而AAMC-S0分别为17.71和2.73。提高采收率试验表明，AAMC-S1可显著提高采收率13.25%，而AAMC-S0可提高采收率7.12%。这些性能使这种新型纳米复合材料在提高采收率方面具有广阔前景。
