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Huaibei kaolin modified and applied research


Surface functional groups and reactivity points are mainly Si-O and Al-O bond and should therefore be selected easily with Si-O and Al-O bond formation with a bit of surface chemical modifier. In addition, the calcined kaolin Huaibei also change the surface pH, acidity increases. The kaolinite in the pH between 6-7, after calcination at between 5.6-6.1. Therefore, the destination selection process should be modified weakly alkaline surface modifiers, so that both can be effectively a chemical reaction, the surface modifier molecule coupling in the mineral surface. Ultra-fine grinding the part of the mechanical energy into surface energy of new surface. Huaibei coal for use as filler kaolin powder, easy to join the high surface energy, it is difficult in the organic matrix (eg, rubber) in dispersed by surface modification, the surface can be reduced. The use of silane and titanate as the modifier Huaibei kaolin surface,ed hardy uk, only surface modification using silane coupling effect is not very satisfactory, a single surface modification using silane coupling agent of Huaibei kaolin When used as a rubber filler, and not to mechanical and physical performance is greatly improved. Application of silane coupling agent as the best is silica. This is because the silica surface has a lot more than kaolinite hydroxyl, filler particles the more surface hydroxyl groups occurs more easily with the silane coupling reaction. Coal calcined kaolin, kaolinite hydroxyl has drop out, can not bond with the silane condensation occurs, the calcined clay and silane coupling agent from the ridge between the adsorption reaction may be more of a reaction, rather than the chemical binding reaction . Huaibei coal in the future should be combined with structural characteristics of the surface of calcined kaolin and application purposes, effectively choose a better surface modifier. References: [1] Li Baozhi, et al. Calcined kaolin surface modification [J]. Non-metallic minerals, 2005, (z1) :15-16. [2] Qin-Fu,mulberry bags uk, et al. Surface modification of kaolin Problems and Solutions [J]. China Non-metallic Minerals Industry Herald, 2000, (3) :8-11. [3] Xu Hongliang, et al. Processing methods on the coal-bearing kaolinite in the kaolinite structure and properties [J]. Mineral and chemical processing, 2004, (3) :33-36. [4] Xu Hongliang, et al. Influence the effect of kaolin surface modification studies [J]. China Mining 2003, (12) :56-57. [5] Xin-Hai Liu, et al. Datong kaolin surface modification and Evaluation [J]. Utilization of Mineral Resources, 2004, (6) :33-36. [6] Cheng Xianzhong, et al. Surface modification of calcined kaolin in the cable rubber compound applied research [J]. China Powder, 2005, (4) :45-48. [7] Liu Zhuoqin, et al. Surface modification of nano-kaolin preliminary study [J]. Mineral and chemical processing, 2005,MBTシューズ 販売店, (5) :20-24. [8] Li Baozhi. Coal calcined kaolin products in the polymer surface modification and the application [J]. Technological advances,vibram five fingers outlet, 2005, (2) :38-41. [9] Cheng Xianzhong, et al. Yichang coal calcined kaolin and surface modification applications in cable rubber compound [J]. South China Geology and Mineral Resources, 2005,diesel store paris, (3) :20-21. [10] Ransong Lin, et al. Yichang coal calcined kaolin, and surface modification applications in SBR [J]. Utilization of Mineral Resources, 20o4, (4): 18 a l9. [11] Xin-Hai Liu, et al. Sedimentary surface modification and application of calcined kaolin experimental study [J]. China Powder Engineering. 2005, (2) :3-6. [12] Wang-Chi, et al. Yichang sedimentary surface modified calcined kaolin and applied research [J]. Mineral and processing, 2006, (9) :8-12. [13] GUNISTEREbru, eta1. Effectofcationicsurfactantad. sorptionontherheologicalandSurfacepropertiesofben-tonitedispersions [J]. JournalofColloidandInterfaceSci. ence ,2006,303:137-141. [14] IHeidmarm, eta1. Competitivesorptionofprotonsandmetalcationsontokao linite: experimentsandmodeling [J]. Jour-nalofColloidandInterfaceScience ,2005,282:270-282.
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