硅烷季铵盐改性纳米二氧化硅颗粒表面性质及泡沫能力评价
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摘要
以气相二氧化硅为原料,利用3-氯丙基三甲氧基硅烷及其衍生季铵盐对纳米二氧化硅颗粒进行改性,得到一系列与不同链长硅氧烷偶联的改性纳米二氧化硅颗粒,并对二氧化硅颗粒的表面性质以及泡沫性质进行研究。结果表明,经过改性后的纳米二氧化硅颗粒具有更优良的分散性质,团聚粒径由未改性时的459 nm减小至改性后的255 nm;纳米二氧化硅颗粒涂层的水接触角实验表明,硅烷偶联剂的碳链长度与颗粒接触角存在关联,并且接触角接近90°的颗粒对月桂酰胺丙基甜菜碱起泡剂的稳泡效果越好,降低起泡剂溶液表面张力的能力也越强。
Fumed silica is modified by 3-chloropropyl trimethoxysilane and its derivative quaternary ammonium salt to obtain a series of modified nano silica particles coupling with siloxane with different chain length. The surface properties and foam properties of modified nano silica particles are studied.The results show that the modified nano silica particles have better dispersion properties than before modification.The dynamic light scattering( DLS) results show that the size of agglomeration decreases to 255 nm from 459 nm for unmodified one. The water contact angles experiment discloses that the contact angle is related to the carbon chains length of silane coupling agent. Meanwhile,the particles with a contact angle close to 90° can bring to a better foam stabilization efficiency to lauryl propyl betaine and has a stronger ability to cut down surface tension of foaming agent solution.
Fumed silica is modified by 3-chloropropyl trimethoxysilane and its derivative quaternary ammonium salt to obtain a series of modified nano silica particles coupling with siloxane with different chain length. The surface properties and foam properties of modified nano silica particles are studied.The results show that the modified nano silica particles have better dispersion properties than before modification.The dynamic light scattering( DLS) results show that the size of agglomeration decreases to 255 nm from 459 nm for unmodified one. The water contact angles experiment discloses that the contact angle is related to the carbon chains length of silane coupling agent. Meanwhile,the particles with a contact angle close to 90° can bring to a better foam stabilization efficiency to lauryl propyl betaine and has a stronger ability to cut down surface tension of foaming agent solution.
引文
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[3]Cassanelli M,Prosapio V,Norton I,et al.Acidified/basified gellan gum gels:The role of the structure in drying/rehydration mechanisms[J].Food Hydrocolloids,2018,82:346-354.
[4]Rodrigo A Grau,Janusz S Laskowski.Role of frothers in bubble generation and coalescence in a mechanical flotation cell[J].The Canadian Journal of Chemical Engineering,2006,84(2):170-182.
[5]Li R F,Yan W,Liu S,et al.Foam mobility control for surfactant enhanced oil recovery[J].SPE Journal,2010,15(4):928-942.
[6]Ramsden W.Separation of solids in the surface-layers of solutionsand‘suspensions’[J].Proc R Soc London,1903,72:156-164.
[7]Pickering S U.CXCVI.-Emulsion[J].Journal of Chemistry Science,1907,91:2001-2021.
[8]陈洪龄,吴玮.颗粒稳定乳液和泡沫体系的原理和应用(Ⅰ)——Pickering乳液的稳定机制和影响因素[J].日用化学工业,2013,43(1):10-15.
[9]Horozov T S,Aveyard R,Clint J H,et al.Particle zips:Vertical emulsion films with particle monolayers at theirsurfaces[J].Langmuir,2005,21(6):2330-2341.
[10]Horozov T S.Foams and foam films stabilised by solidparticles[J].Current Opinion in Colloid&Interface Science,2008,13(3):134-140.
[11]Hariz T R.Nanoparticle-stabilized CO2foams for potential mobility control applications[D].Austin:The University of Texas,2012.
[12]Espinosa D,CaldelasF,Johnston K,et al.Nanoparticle-stabilized supercritical CO2foams for poten-tial mobility control applications[R].SPE 129925,2010.
[13]李兆敏,王鹏,李松岩,等.纳米颗粒提高二氧化碳泡沫稳定性的研究进展[J].西南石油大学学报(自然科学版),2014,36(4):155-161.
[14]孙乾,李兆敏,李松岩,等.添加纳米SiO2颗粒的泡沫表面性质及调剖性能[J].中国石油大学学报(自然科学版),2016,40(6):101-108.
[15]孙乾,李兆敏,李松岩,等.Si O2纳米颗粒稳定的泡沫体系驱油性能研究[J].中国石油大学学报(自然科学版),2014,38(4):124-131.
[16]王刚,王克亮,逯春晶,等.Janus颗粒的制备及泡沫性能[J].高等学校化学学报,2018,39(5):990-995.
[17]杨辉,陈飞.乙烯基三甲氧基硅烷对二氧化硅的超疏水改性研究[J].人工晶体学报,2015,44(9):2597-2605.
[18]袁文俊,周勇敏.纳米颗粒团聚的原因及解决措施[J].材料导报,2008,22(S3):59-61.
[19]Katherine Kho,Kunn Hadinoto.Aqueous re-dispersibilitycharacterization of spray-dried hollow spherical silica nano-aggregates[J].Powder Technology,2009,198(3):354-363.
[20]Aroonsri A,Worthen A J,Hariz T,et al.Conditions forgenerating nanoparticle-stabilized CO2foams in fractureand matrix flow[C].SPE 166319,2013.