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作 者:张彩利 王怀毅 李天豪 杨凤雷 齐浩松 ZHANG Caili;WANG Huaiyi;LI Tianhao;YANG Fenglei;QI Haosong(School of Civil and Transportation,Hebei University of Technology,Tianjin 300401,China;Tianjin Traffic Engineering Green Material Technology Engineering Center,Tianjin 300401,China;United Front Work Department of the People’s Government of Luquan District,Shijiazhuang 050200,China;Tianjin Kaimande Engineering Technology Co.,Ltd.,Tianjin 300450,China)
机构地区:[1]河北工业大学土木与交通学院,天津300401 [2]天津市交通工程绿色材料技术工程中心,天津300401 [3]中共石家庄市鹿泉区委统战部,河北石家庄050200 [4]天津市凯曼德工程技术有限公司,天津300450
出 处:《应用化工》2024年第9期2052-2056,共5页Applied Chemical Industry
基 金:国家自然科学基金(52008154)。
摘 要:采用紫外线吸收剂对水性环氧彩色涂层改性,通过室内加速老化模拟试验、红外光谱和扫描电镜试验研究涂层老化机理、紫外线吸收剂改性机理与效果,并分别在浸水、高低温、紫外老化、化学腐蚀及长期磨耗作用条件下测试涂层路用性能。研究表明,当紫外线吸收剂质量分数为5%时,老化后涂层抗拉强度和断裂伸长率最大,涂层黄变值最低;紫外线照射会破坏涂层中较弱的化学键,分子链发生断裂,产生老化现象;紫外线吸收剂通过代替化学键吸收紫外线能量,提高耐紫外线老化性;改性后增韧涂层在各条件下均能保持较好的抗滑耐磨耐久性。Aqueous epoxy color coatings was modified by UV absorbent.Through indoor accelerated aging simulation tests,FTIR tests and SEM tests,the aging mechanism of coatings,the modification mechanism and effect of ultraviolet absorbers were studied.And the road performance of the coating was tested under conditions of immersion,low temperature,high temperature,UV aging,chemical corrosion,and long-term wear.The results show that when the mass fraction of ultraviolet absorber is 5%,the tensile strength and elongation at break of the coating after aging are the largest,and the yellowing value of the coating is the lowest.Ultraviolet radiation can damage weaker chemical bonds in water-based epoxy resins,causing molecular chains to break and lead to aging.UV absorbers absorb UV energy by replacing chemical bonds,improving UV aging resistance.The modified and toughened coating can maintain good sliding resistance,wear resistance,and durability under various conditions.
关 键 词:水性环氧树脂 彩色涂层 增韧改性 路用性能 耐紫外线老化
分 类 号:TQ323.5[化学工程—合成树脂塑料工业]
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