将苯并三唑、丙烯酸树脂、乙酸乙酯和无水酒精等按一定比例混合制得两种竹材表面耐光老化涂层物质,分析其对紫外光与可见光的吸收性能; 将未添加苯并三唑的涂层物质和添加苯并三唑的涂层物质涂布于竹片表面进行自然光照老化处理,分析试样光老化时的色度稳定性。结果表明:添加苯并三唑后的涂层对300～380 nm的紫外光吸收较未添加的涂层大幅增加; 随着涂层厚度的增加,涂层的吸光度及吸收峰峰宽明显增加。自然老化试验发现,涂布添加苯并三唑涂层的试样在光老化时的色度稳定性得到显著提高,自然老化112 d后总色差比未涂布涂层的试样降低了67.8%。
Abstract
Two kinds of coating formulations were obtained by BTZ, acrylic resin, ethyl acetate and anhydrous alcohol which mixed at a certain proportion, and their spectral analysis of two kinds of coating formulations was investigated. Color-stability of bamboo coated with formulation B(added BTZ, named B)was demonstrated through a weathering experiment. The results showed the absorbance among 300-380 nm of formulation B was higher than that of formulation A(unadded BTZ, named A). The absorbance value and width of absorption peak appeared positive correlation with painting thickness. Color-stability of bamboo with formulation B was improved during aging, and ΔE value of B decreased by 67.8% compared with blank after 112 days aging.
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基金
收稿日期:2013-12-09 修回日期:2014-05-26
基金项目:国家林业公益性行业科研专项项目(201404505); 浙江省重点科技创新团队项目(2010R50023-2); 浙江省科学技术厅项目(2012F20001); 国家林业局竹子研究开发中心项目(ZXJJ201204)
第一作者:李能,研究实习员。*通信作者:陈玉和,研究员。E-mail: yuhec@sina.com。
引文格式:李能,陈玉和,张泽前,等. 竹材耐光老化有机涂层的紫外屏蔽性能[J].
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