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摘要
将自制改性纳米TiO2在催化剂作用下与二苯基甲烷二异氰酸酯、聚醚二醇、二羟甲基丙酸和一缩二乙二醇反应,通过傅里叶变换红外光谱仪、扫描电子显微镜以及透射电子显微镜对产物进行分析,证实纳米TiO2成功接枝到聚氨酯分子链上,形成稳定的纳米TiO2/聚氨酯复合乳液。研究表明,随着纳米TiO2含量增加,纳米TiO2/聚氨酯复合涂膜的热稳定性能和耐水性能增强,其铅笔硬度和抗冲击强度增大,玻璃化转变温度上升,当纳米TiO2质量分数为0.8%时,复合涂膜的综合性能最优。
Abstract
The home-made modified nano TiO2 reacted with diphenylmethane diisocyanate,polyether glycol,dihydroxymethylpropanoic acid and diethylene glycol under the action of a catalyst.The resulted product was analyzed by infrared spectroscopy(FT-IR),scanning electron microscope(SEM) and transmission electron microscope(TEM).It was confirmed that the nano TiO2 was successfully grafted onto the PUR molecular chain to form a stable modified nano TiO2/PUR composite emulsion.The results shown that with the increase of the content of nano TiO2,the thermal stability and water resistance of the composite coating,the hardness and shock resistance of the coating pencil,and the Tg(glass-transition temperature) increased.When the content of TiO2 was 0.8%,the composite properties of the coating were optimal.
关键词
纳米二氧化钛
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聚氨酯
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复合材料
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综合性能
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表征
Key words
nano-TiO2
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polyurethane(PUR)
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composite material
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integrated performance
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characterization
纳米TiO2/聚氨酯复合材料的制备及性能研究[J].
化工新型材料, 2020, 48(12): 65-67 DOI:10.19817/j.cnki.issn 1006-3536.2020.12.016
[1] 李定云.紫外(UV)固化涂料挥发性有机化合物(VOC)测量方法探讨[J].化工新型材料,2015,43(12):38-42.
[2] 刘阳思,许艳,张玉波,等.亲油性纳米TiO2/PMMA复合粒子的制备及表征[J].高分子材料科学与工程,2015,24(11):47-50.
[3] 罗敏,郭文露,孟祥国,等.纳米TiO2改性水性聚氨酯乳液的制备及性能研究[J].涂料工业,2014,44(7):36-40.
[4] Lee S Y,Lee J S,Kim B K.Preparation and properties of waterborne polyurethanes[J].Polymer International,2017,42(1):67-76.
[5] 袁琳,马悠琴,周峰,等.聚氨酯/碳纳米管复合材料的制备及其对血小板黏附的抑制作用[J].材料导报,2015,23(9):39-41.
[6] 许戈文.水性聚氨酯材料[M].北京:化学工业出版社,2007.
[7] Suma K K.Studies on the effect of nano-TiO2 on vinyl acetate-butyl acrylate latex-based surface coating[J].Materials Science and Engineering B,2010,168:254-258.
基金资助
2020年结构化学国家重点实验室基金课题(20200027);2019年江苏省住建厅科技项目(2019ZD097);2019年江苏高校“青蓝工程”优秀教学团队(苏教师[2019]3号)
