生物基孢粉素微囊改性水性聚氨酯自消光涂层的制备及性能  

Preparation and Properties of Waterborne Polyurethane Self-matting Coatings Modified by Bio-based Sporopollenin Exine Capsules

作　　者：肖清林 杨明君[1] 吕品 卢雨晴 张益铭 易崇森 XIAO Qinglin;YANG Mingjun;LYU Pin;LU Yuqing;ZHANG Yiming;YI Chongsen(School of New Energy and Materials,Southwest University of Petroleum,Chengdu 610500,China)

机构地区：[1]西南石油大学新能源与材料学院,四川成都610500

出　　处：《塑料工业》2024年第6期63-69,共7页China Plastics Industry

基　　金：黑龙江省“揭榜挂帅”科技攻关项目(2023ZXJ06A05)。

摘　　要：采用物理共混法将孢粉素微囊(SEC)分散在水性聚氨酯(WPU)乳液中用于制备WPU自消光涂层,借助红外光谱仪(FTIR)、扫描电子显微镜(SEM)、热重分析(TG)和力学性能测试,结合表面水接触角和光泽度测试,从表面化学性质和物理结构特征两方面研究了SEC增强WPU的机理。SEM结果显示,SEC表面网孔结构与基体结合良好。其他测试分析表明,SEC/WPU复合材料的拉伸性能和热性能比SEC-0/WPU(纯WPU)更为优异,SEC-0/WPU的拉伸断裂强度为7.5 MPa,随着SEC的添加,样品的拉伸强度增加,SEC质量分数为0.46%时,SEC-0.46/WPU的拉伸强度达到最大(21.3 MPa)。质量保持率在70%时,样品的分解温度从320.6℃(SEC-0/WPU)提高到了333.4℃(SEC-0.84/WPU)。SEC的添加还降低了WPU软段的分解速率,增加了玻璃化转变温度(T_(g)),SEC-0/WPU的T_(g)仅为27.84℃,SEC-0.14/WPU达到了56.53℃。与SEC-0/WPU相比,SEC-0.84/WPU的表面水接触角增加了17.6°,表面光泽度从81.4 GU下降至6.8 GU,成功制备出拉伸性能和热性能优异的自消光涂层。To prepare the waterborne polyurethane(WPU)self-matting coatings,sporopollenin exine capsules(SEC)were dispersed in the WPU emulsion using the physical blending method.The mechanisms of SEC-enhanced WPU were investigated through analyzing surface chemical properties and physical structure characteristics,employing Fourier transform infrared spectroscopy(FTIR),scanning electron microscopy(SEM),thermogravimetric analysis(TGA),mechanical property testing,surface water contact angle testing,and glossiness testing.SEM results reveal a well-interconnected mesh structure of SEC with the matrix.Further analyses indicate that the tensile properties and thermal performances of SEC/WPU composite materials surpass those of SEC-0/WPU(pure WPU).The tensile fracture strength of SEC-0/WPU is 7.5 MPa.With the adding of SEC,the tensile fracture strength of samples increases.When the mass fraction of SEC is 0.46%,the tensile fracture strength of SEC-0.46/WPU is 21.3 MPa.Additionally,the temperature at which the mass retention reaches 70%rises from 320.6℃for SEC-0/WPU to 333.4℃for SEC-0.84/WPU.The incorporation of SEC also reduces the decomposition rates of WPU soft segments,elevating the glass transition temperature(T_(g)).The T_(g) of SEC-0/WPU is merely 27.84℃,while the T_(g) of SEC-0.14/WPU achieves 56.53℃.Compared with SEC-0/WPU,the surface water contact angle of SEC-0.84/WPU increases by 17.6°,while the surface glossiness of SEC-0.84/WPU decreases from 81.4 GU to 6.8 GU,successfully synthesizing the self-matting coatings with outstanding tensile and thermal properties.

关 键 词：水性聚氨酯 自消光涂层 孢粉素微囊 物理共混 网孔结构 拉伸性能 

分 类 号：TQ323.8[化学工程—合成树脂塑料工业]