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采用不同方法[包括EP(环氧树脂)的pH值调节法、EP中添加改性剂法和改性剂吸附包覆纳米TiO2法等]对纳米TiO2在EP中的分散性进行了研究。结果表明:上述改性方法均能促进纳米TiO2在EP中良好分散:当EP的pH值为3时,相应胶粘剂的剪切强度比pH值未调节体系提高了11.46%;采用EP中添加改性剂法,并且当改性剂为SDBS(十二烷基苯磺酸钠)时,相应胶粘剂的剪切强度比无改性剂体系提高了6.7%;采用改性剂吸附包覆纳米TiO2法,并且当改性剂为SDS(十二烷基磺酸钠)、KH-560(硅烷偶联剂)和SDBS时,相应胶粘剂的剪切强度比无改性剂体系分别提高了41.7%(SDS)、16.4%(KH-560)和9.4%(SDBS)。
The dispersibility of nano-TiO2 in EP was studied by different methods [including the pH adjustment of EP (epoxy resin), the addition of modifier in EP, and the nano-TiO2 method by the modifier). The results show that the above modification method can all promote the fine dispersion of nano-TiO2 in EP. When the pH value of EP is 3, the shear strength of the corresponding adhesive is 11.46% higher than that of the unmodified system. Agent method, and when the modifier is SDBS (sodium dodecyl benzene sulfonate), the shear strength of the corresponding adhesive is increased by 6.7% than that of the non-modifier system; by adopting the modifier to adsorb and coat the nano-TiO2 method, And when the modifiers are SDS (sodium dodecyl sulfate), KH-560 (silane coupling agent) and SDBS, the shear strength of the corresponding adhesives increased by 41.7% (SDS) , 16.4% (KH-560) and 9.4% (SDBS).