紫外光固化桐油基水性聚氨酯木器涂料的制备  

Study on UV curable tung oil based waterborne polyurethane wood coatings

作　　者：刘莉 单浩然 贾晓珂 段世杰 高宇杰 徐晨宇 韦双颖[1] LIU Li;SHAN Haoran;JIA Xiaoke;DUAN Shijie;GAO Yujie;XU Chenyu;WEI Shuangying(Material Science and Engineering College,Northeast Forestry University,Harbin 150040,China)

机构地区：[1]东北林业大学材料科学与工程学院,哈尔滨150040

出　　处：《林业工程学报》2022年第4期115-121,共7页Journal of Forestry Engineering

基　　金：国家自然科学基金(31770593);东北林业大学大学生创新训练项目(202110225424)。

摘　　要：紫外光(UV)固化木器涂料具有环保、节能、高效等特点,近年来成为涂料行业的研究热点,是木器涂料领域的发展方向之一。为应对化石原料不断消耗及环境污染日益严重的现状,利用可再生且廉价的生物质材料制备紫外光固化木器涂料受到广泛关注。笔者通过改性桐油制备桐油基二元醇(TOP)来替代石油基多元醇,制备了一种可UV固化的桐油基水性聚氨酯(WPU)木器涂料。结果表明:当TOP添加量为42.5%(质量分数)时,薄膜力学性能最好,拉伸强度为(1.38±0.13)MPa,断裂伸长率为(179.32±4.05)%,弹性模量为(31.28±3.17)MPa,粒径为287.9 nm,水接触角为(75.89±0.91)°,耐水性较好;硬度、附着力、光泽度、粗糙度和漆膜磨损质量分别为4H、1级、10.24°、1.66μm和每100 r 0.003 g,所制备的WPU硬度、附着力及耐磨性分别满足GB/T 6739—2006《色漆和清漆铅笔法测定漆膜硬度》、GB/T 4893.4—2013《家具表面漆膜理化性能试验第4部分:附着力交叉切割测定法》及GB/T 4893.8—2013《家具表面漆膜理化性能试验第8部分:耐磨性测定法》的测试标准。此法制备的桐油基UV固化水性聚氨酯木器涂料具有广阔的应用前景。UV curable wood coatings have the advantages of environmental protection, energy saving and high efficiency. In recent years, it has become a research hotspot in the coating industry and one of the development directions in the field of wood coatings. In order to cope with the current situation of the continuous consumption of fossil raw materials and increasingly serious environmental pollution, the preparation of UV curable wood coatings using renewable and cheap biomass materials has attracted extensive attention of researchers. As well known, the preparation of polyurethane would consume a lot of petroleum based raw materials, therefore the bio-based polyurethane came into being. Vegetable oil is a biodegradable low-cost biomass resource that can partially replace the polyol component in the polyurethane component and alleviate the dependence of raw materials on petroleum resources. In this study, the UV curable tung oil based waterborne polyurethane(WPU) wood coating was prepared by the modified tung oil-based polyol(TOP) instead of the petroleum-based polyol. The Fourier transform infrared spectroscopy(FT-IR), ultraviolet spectrum, particle size, contact angle analysis, thermogravimetry/dynamic thermal analysis(TG-DTG) and mechanical properties were used to characterize the WPU emulsion and films in this work. The results showed that, when the TOP content was 42.5%, the mechanical properties of the film were the best. The tensile strength was(1.38±0.13)MPa, the elongation at break was(179.32±4.05)%, and the elastic modulus was(31.28±3.17)MPa. When the amount of 2,2-dihydroxymethylpropionic acid was 3%, the milky WPU dispersion can be obtained. The diameter of the emulsion was 287.9 nm, the water contact angle was(75.89±0.91)°, the water absorption was 2.98%, and the water resistance was good. The hardness, the adhesion force, the gloss, the roughness, and the abrasion loss were 4 H, Level 1, 10.24°, 1.66 μm and 0.003 g per 100 r, respectively. The hardness, the adhesion force and the abrasion loss of

关 键 词：桐油 紫外光固化 水性木器漆 水性聚氨酯涂料 

分 类 号：S781.6[农业科学—木材科学与技术] TQ633[农业科学—林学]