多功能CeO_(2)/纤维素纳米纤维复合超疏水涂层的制备与性能  

Fabrication and properties of multifunctional CeO_(2)/cellulose nanofibers composite superhydrophobic coating

作　　者：樊鑫炎 黄俊雅 杨炎晓 宋丽丽 王永贵[1] 肖泽芳[1] 王海刚[1] 谢延军[1] FAN Xinyan;HUANG Junya;YANG Yanxiao;SONG Lili;WANG Yonggui;XIAO Zefang;WANG Haigang;XIE Yanjun(Key Laboratory of Bio-based Material Science and Technology of Ministry of Education,Northeast Forestry University,Harbin 150040,China)

机构地区：[1]东北林业大学生物质材料科学与技术教育部重点实验室,哈尔滨150040

出　　处：《复合材料学报》2023年第5期3002-3017,共16页Acta Materiae Compositae Sinica

基　　金：国家自然科学基金(31901247)。

摘　　要：自然界超疏水现象因独特的润湿性能被广泛关注,超疏水涂层的制备与应用尤为迫切。采用硝酸铈六水合物(Ce(NO_(3))_(3)·6H_(2)O)共沉淀法于纤维素纳米纤维(CNFs)表面合成二氧化铈(CeO_(2)),通过十八烷基三甲基硅氧烷(OTMS)对其进行疏水改性,喷涂构筑得到超疏水涂层。探讨了CNFs、Ce(NO_(3))_(3)·6H_(2)O和OTMS不同质量比对超疏水涂层形貌和疏水性能的影响。结果表明:CNFs和Ce(NO_(3))_(3)·6H_(2)O质量比为1∶5和1∶7涂层具有实现超疏水特性的微/纳结构,其中CNFs、Ce(NO_(3))_(3)·6H_(2)O和OTMS质量比为1∶5∶10涂层接触角为(159.7±1.1)°,滚动角为(5.7±1.8)°,经过150°C高温处理3 h和UV照射36 h后接触角仍大于150°,同时具有良好的p H稳定性和一定的力学强度。涂层应用于玻璃、纸、木材和海绵等基体均可构筑超疏水表面并赋予其优异的自清洁性能,其中超疏水玻璃涂层对UV-A和UV-B紫外透过率分别为12.6%和0.1%,超疏水海绵吸油效率达94%左右。该超疏水涂层有望被用作保护材料并且拓展了稀土金属氧化物在纤维素基超疏水涂层领域的应用。The superhydrophobic phenomenon in nature has attracted more attention due to its unique wettability.It is urgent that the preparation and application of superhydrophobic coating.Cerium dioxide(CeO_(2))was in situ synthesized on the surface of cellulose nanofibers(CNFs)by co-precipitation method using cerium nitrate hexahydrate(Ce(NO_(3))_(3)·6H_(2)O),following modified by octadecyltrimethoxysilane(OTMS)and the coating was constructed by spraying method.It investigated the effects of different mass ratios of CNFs,Ce(NO_(3))_(3)·6H_(2)O,and OTMS on coating morphology and hydrophobicity.The results show that the coatings consisting of CNFs,and Ce(NO_(3))_(3)·6H_(2)O with the mass ratios of 1∶5 and 1∶7 can construct the micro/nanostructure contributing to achieving superhydrophobic properties.When the mass ratios of CNFs,Ce(NO_(3))_(3)·6H_(2)O,and OTMS is 1∶5∶10,the coating static contact angle is(159.7±1.1)°and the sliding angle is(5.7±1.8)°.Its static contact angle can remain greater than 150°after the 150°C heating for 3 h and UV illumination for 36 h,meanwhile,possesses excellent pH stability and certain mechanical durability.When applied to glass,paper,wood,sponge,and other substrates,superhydrophobic surfaces can be constructed with excellent self-cleaning performance.The UV transmittance of superhydrophobic glass coating to UV-A and UV-B is 12.6%and 0.1%,respectively.The oil absorption efficiency of the superhydrophobic sponge is about 94%.This superhydrophobic coating is expected to use as a protective material and extends the application of rare earth metal oxidate in the cellulose-based superhydrophobic coating field.

关 键 词：超疏水 纤维素纳米纤维 二氧化铈 涂层 原位合成 紫外屏蔽 

分 类 号：TB332[一般工业技术—材料科学与工程]