Study on surface modification and properties of silica

  • SUN Rui-ting ,
  • DUAN Shi-bo ,
  • LIAO Ming-yi
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  • (Transportation Management College,Dalian Maritime University, Dalian 116026, China)

Received date: 2019-09-19

  Revised date: 2019-11-21

  Online published: 2019-11-21

Abstract

In order to improve the affinity of silica to organic polymers, the surface of silica particles was modified by coupling agent with the structure characteristics of lipophilic and hydrophilic groups. The effects of modification time, temperature, pH and the mass ratio of coupling agent to silica on the surface modification of silica were investigated. The structure and modification effect of silica before and after modification were characterized by means of infrared spectrum, thermogravimetry, nitrogen adsorption desorption, contact angle, activation degree and sedimentation volume test. The results show that the modification effect of γ-methylpropenylpropyltrimethoxysilane (KH570) is better than that of γ-mercaptopropylethoxybis (propane hexaethoxy siloxane) (Si747) and bis(γ-triethoxysilypropyl) tetrasulfide (Si69). Taking anhydrous ethanol as modifier, when the mass ratio of KH570 to silica is 14%, the modification temperature is 50 ℃, the pH is 7, and the modification reaction is 6 hours, the activation degree reaches the maximum. After the modification, the coupling agent is grafted on the surface of silica, the hydrophilicity is reduced, the dispersibility improved, and the surface wettability is obviously improved, which widen the industrial application scope of silica.

Cite this article

SUN Rui-ting , DUAN Shi-bo , LIAO Ming-yi . Study on surface modification and properties of silica[J]. Journal of Dalian Maritime University, 2020 , 46(1) : 131 -136 . DOI: 10.16411/j.cnki.issn1006-7736.2020.01.015

References

[1]陈毅敏.国内天然橡胶白炭黑湿法混炼技术发展的现状[J].橡塑技术与装备橡胶, 2016, 42(21):26-30
[2]CHEN Y M.Present situation of wet mixing technology for domestic natural rubber white carbon black[J].China Rubber Plastics Technology And Equipment(Rubber), 2016, 42(21):26-30
[3] Jong Suk Sonn, Ju Yeon Lee, Seon Hui Jo.Effect of surface modification of silica nanoparticles by silane coupling agent on decontamination foam stability[J].Annals of Nuclear Energy, 2018, 114:11-18
[4] 李岩, 韩丙勇.白炭黑的表面改性及其高填充SSBR复合材料的制备和性能研究[D]. 北京: 北京化工大学, 2014.
[5]LI Y, GAN B Y.Study on surface modification of silica and preparation and properties of modified silica highly filled SSBR composites[D]. Beijing: Beijing University of Chemical Technology, 2016. (in Chinese)
[6] Gui Y, Zheng J, Ye X.Preparation and performance of silica/ SBR masterbatches with high silica loading by latex compounding method[J].Composites Part B, 2016, 85:130-139
[7] 吕晓茵, 刘力.白炭黑的表面改性及其填充硅橡胶结构与性能研究[D]. 北京: 北京化工大学, 2014.
[8]LV X Y, LIU L.Studies on silica surface modification and its influence on structure and properties of silicone rubber[D]. Beijing: Beijing University of Chemical Technology, 2016. (in Chinese)
[9] 张奇峰, 张立群.液态混炼溶聚丁苯/白炭黑母胶小试技术研究[D]. 北京: 北京化工大学, 2014.
[10]ZHANG Q F, ZHAGN L Q.The design, Preparation and lab scale application study of S-SBR/ silica master batch by solution compounding[D]. Beijing:Beijing University of Chemical Technology, 2016. (in Chinese)
[11] Zhang C F, Tang Z H, Guo B C.Significantly improved rubber-silica interface via subtly controlling surface chemistry of silica.[J].Composites science and Technology, 2018, 156:70-77
[12] 龙永德, 温世鹏.白炭黑表面改性及其填充溶聚丁苯橡胶的研究[D]. 北京: 北京化工大学, 2016.
[13]LONG D Y, WEN S P.Surface modification of silica and study on solution styrene butadiene rubber with modified silica[D]. Beijing:Beijing University of Chemical Technology, 2016. (in Chinese)
[14] 赵栋栋, 刘力.液相法制备白炭黑填充溶聚丁苯橡胶复合材料及结构与性能研究[D]. 北京:北京化工大学, 2016.
[15]ZHAO D D, LIU L.Preparation of silica filled solution styrene butadiend rubber composites by wet method and study on the structure and properties of composites[D]. Beijing: Beijing University of Chemical Technology, 2016. (in Chinese)
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