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Synthesis and Characterization of a New Surface-Modified Nanoparticle Using Fluoroalkanoic Acids as a Wettability Alteration Agent
Journal of Nanomaterials ( IF 3.791 ) Pub Date : 2020-10-09 , DOI: 10.1155/2020/8814260
Kenny Ganie 1, 2 , Dzeti Farhah Mohshim 1 , Ismail Mohd Saaid 1 , Wan Rosli Wan Sulaiman 2 , Ahmad Kamal Idris 2
Affiliation  

Previously, condensate banking removal in gas reservoir is mitigated using chemical treatments to alter the wettability of the near-wellbore region. However, this technique performed unsatisfactorily as it reduces the surface free energy and affects the gas relative permeability negatively. Hence, alternative surface-modified nanoparticles using fluorine-based chemicals were developed as wettability alteration agents since fluorine exhibits a high degree of liquid repellency and nanoparticles introduce high surface roughness. The newly synthesized surface-modified nanoparticles were characterized using FTIR, DLS, FESEM, and TGA. FTIR results highlight the characteristic absorption of Si-O-C group at peak 1105 and 1106 cm-1 in both fluoroalkanoic acids, demonstrating that fluorochemical molecules have been successfully coated onto silica nanoparticles. Nanoparticle sizes measured by DLS reported higher value than FESEM due to agglomeration, and the DLS measurement was done in hydrodynamic conditions. TGA analysis reveals decomposition at temperature between 100 and 150°C, indicating that these surface-modified nanoparticles can be utilized in an environment below 100°C. Higher decomposition was perceived on PFNA-modified nanoparticles as a thicker coating of PFNA is shrouding the silica nanoparticles compared to PFOA. Implications of the results will path the way for future research direction in using fluorine-based surface-modified nanoparticles as wettability alteration agents.

中文翻译:

含氟链烷酸作为润湿性改变剂的新型表面改性纳米粒子的合成与表征

以前,通过化学处理来改变近井眼区域的润湿性,可以减轻气藏中凝结水的清除。但是,该技术的表现不理想,因为它降低了表面自由能并对气体的相对渗透率产生了负面影响。因此,由于氟表现出高度的拒液性并且纳米粒子引入了高的表面粗糙度,因此开发了使用基于氟的化学物质的替代的表面改性的纳米粒子作为润湿性改变剂。使用FTIR,DLS,FESEM和TGA对新合成的表面改性纳米粒子进行了表征。FTIR结果突出了1105和1106 cm -1峰处Si-OC基团的特征吸收在这两种氟代链烷酸中,表明氟化学分子已成功地涂覆在二氧化硅纳米粒子上。由于团聚,通过DLS测量的纳米颗粒尺寸值比FESEM高,并且DLS测量在流体动力学条件下进行。TGA分析显示在100至150°C的温度下分解,表明这些表面改性的纳米粒子可在100°C以下的环境中使用。在PFNA改性的纳米颗粒上,人们认为分解程度更高,因为与PFOA相比,PFNA的厚涂层掩盖了二氧化硅纳米颗粒。结果的含义将为使用氟基表面改性纳米颗粒作为润湿性改变剂的未来研究方向铺平道路。
更新日期:2020-10-11
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