摘要
为了探究不同添加量的纳米TiO 2和纳米ZnO对丙烯酸水性漆漆膜性能以及挥发性有机化合物(VOCs)成分的影响,向丙烯酸水性漆中分别添加占涂料成膜物质质量0.05%,0.10%,0.30%,0.50%的纳米TiO 2以及纳米ZnO制备改性水性漆。将制备的改性水性漆均匀涂在基材上,按照相关的国家标准测试改性水性漆的漆膜耐磨性、附着力、硬度,并利用15 L小型环境舱采集改性水性漆释放的挥发性有机化合物,采用气相色谱-质谱联用仪分析VOCs的主要成分、主要危害物质。结果表明:随着纳米氧化物添加量的增大,水性漆漆膜耐磨性逐渐增加。在加入等量纳米氧化物的情况下,纳米ZnO对水性漆耐磨性的增强作用更明显;纳米TiO 2和ZnO在一定程度上都能增强水性漆漆膜硬度以及附着力,但是这种增强作用是有限的,当加入量为0.30%时,漆膜硬度和附着力达到最大;纳米材料主要通过增加挥发性有机化合物(芳香烃类、酯类)的浓度来增加总体VOC的浓度;丙烯酸水性漆释放的主要危害物质为苯、甲苯,次要危害物质为二甲苯、邻苯二甲酸二丁酯。
Nanomaterials have been used more and more widely in the field of coating modification,among which nano-TiO 2 and ZnO are commonly used.In order to explore the effects of different addition amounts of nano-TiO 2 and ZnO on the performance of acrylic waterborne paint film and volatile organic compounds(VOCs),using the ultrasonic blending method,the modified waterborne paint was prepared by adding 0.05%,0.10%,0.30%and 0.50%nano-TiO 2 and ZnO of the film-forming substance mass to the acrylic waterborne paint.The prepared modified waterborne paint was uniformly coated on the substrate,and the abrasion resistance,adhesion and hardness of the modified waterborne paint were tested according to relevant national standards.The volatile organic compounds released by the modified waterborne paint were collected by a 15 L small environmental chamber,and the main components and main harmful substances of VOCs were analyzed by gas chromatography/mass spectrometer.The results showed that the nano-oxide had a significant effect on the performance of waterborne paint film by changing the molecular force between waterborne paint and substrate.The large specific surface area of nanoparticles enhanced the interaction between waterborne paint coatings and substrates.However,when the nanoparticles were excessive,the agglomeration of nanoparticles would lead to structural defects when the waterborne paint solidified and reduced the bonding strength between the paint film and the substrate.As the added nano-oxides increased,the wear resistance of the waterborne paint film gradually enhanced.In the case of adding the same amount of nano-oxide,nano-ZnO had the most obvious effect on the abrasion resistance of waterborne paint;nano-TiO 2 and ZnO could enhance the hardness and adhesion of waterborne paint film to a certain extent,but this reinforcement was limited.When the addition amount was 0.30%,the hardness and adhesion of the paint film were maximized;nanomaterials increased the concentration of total VOC by increasing the concentration of main volatile organic compounds,such as aromatic hydrocarbons and esters,and by increasing the concentration of monomer VOC,such as benzene,toluene,ethylbenzene,p-xylene,butyl acetate,acetic acid,1-methylpropyl ester,etc.According to the maximum allowable concentration of VOCs defined by the California Office of Environmental Health Hazard Assessment(OEHHA),the main harmful substances released by acrylic waterborne paint were benzene,toluene,and the secondary hazardous substance were xylene,dibutyl phthalate.
作者
蒋利群
沈隽
赵政
董华君
李永博
JIANG Liqun;SHEN Jun;ZHAO Zheng;DONG Huajun;LI Yongbo(School of Materials Science and Engineering,Northeast Forestry University,Harbin 150040,China;Harbin University of Commerce,Harbin 150028,China)
出处
《林业工程学报》
CSCD
北大核心
2019年第4期148-155,共8页
Journal of Forestry Engineering
基金
“十三五”国家重点研发计划(2016YFD0600706)
关键词
纳米材料
水性漆
漆膜性能
挥发性有机化合物
有害物质
nanomaterial
waterborne paint
film property
volatile organic compound
harmful substance
