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采用溶液聚合法合成大分子改性剂低相对分子量聚丁二烯液体橡胶接枝马来酸酐(LMPB-g-MAH)对纳米TiO_2进行表面改性。通过调节强、弱极性溶剂比例来研究改性过程中溶剂对改性效果的影响,探索理想改性环境;运用IR、GPC、粒径、TGA、接触角、亲油化度和沉降实验手段对粉体改性效果进行表征。结果表明:LMPB-g-MAH在有机溶剂环境下均能成功改性纳米TiO_2,但是,混合溶剂环境下LMPB-g-MAH对粉体的改性效果明显优于单溶剂环境,尤以乙酸乙酯∶DMF=9∶1混合环境最佳。
The surface modification of nano-TiO 2 was achieved by the solution polymerization of LMPB-g-MAH with high molecular weight modifier and low relative molecular weight polybutadiene liquid rubber grafted maleic anhydride. By adjusting the ratio of strong and weak polar solvents, the effect of solvent on the modification was studied, and the ideal modified environment was explored. By means of IR, GPC, particle size, TGA, contact angle, lipophilicity and sedimentation experiment The effect of powder modification was characterized. The results showed that LMPB-g-MAH could successfully modify TiO_2 in organic solvents. However, the modification effect of LMPB-g-MAH on the powders was better than that of single solvent in mixed solvent environment, Ester: DMF = 9: 1, the best mixing environment.