不同粘合剂对水杨醛类席夫碱涂层的发射率和热致变色性能的影响研究
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摘要
用溶液法合成了3种不同结构的水杨醛类席夫碱填料,并分别与2种粘合剂丙烯酸(AAS)和环氧树脂(EP)通过喷涂法制备出6种涂层;为了研究粘合剂AAS和EP对水杨醛类席夫碱涂层的发射率和热致变色性能的影响,我们通过红外光谱仪和紫外-可见光谱仪表征水杨醛类席夫碱填料微观结构;TG-DSC表征填料稳定性;并分别测量了20～240℃范围内填料和涂层的热致变色情况以及在3～5?m和8～14?m波段的红外发射率。结果表明,两种粘合剂的加入对热致变色几乎没有影响。EP与填料形成的涂层更接近填料的发射率。综合考虑发射率和热致变色两个因素,EP更适合作为粘合剂与水杨醛席夫碱类填料形成热致变色涂层。
In this paper, three kinds of salicylaldehyde Schiff-base fillers with different structures were synthesized via a solution synthesis method, and six kinds of coatings were prepared by spray-coating the fillers with two kinds of adhesive acrylics(AAS) and epoxy resin(EP) respectively. In order to study the effects of adhesives on emissivity and thermochromic properties of salicylaldehyde Schiff base coatings, the microstructures of salicylaldehyde Schiff base fillers were characterized using IR and UV. TG-DSC was used to characterize the stability of the fillers. The thermochromism properties and infrared emissivity at 3-5?m and 8-14 ?m of the fillers and coatings were measured at 20-40℃. The results show that the addition of the two kinds of adhesives barely affects the thermochromism properties. The infrared emissivity of the coating constructed by EP is closer to that of the fillers. Apparently, EP is a more suitable binder to form coatings with salicylaldehyde Schiff base fillers by considering both emissivity and thermochromism.
In this paper, three kinds of salicylaldehyde Schiff-base fillers with different structures were synthesized via a solution synthesis method, and six kinds of coatings were prepared by spray-coating the fillers with two kinds of adhesive acrylics(AAS) and epoxy resin(EP) respectively. In order to study the effects of adhesives on emissivity and thermochromic properties of salicylaldehyde Schiff base coatings, the microstructures of salicylaldehyde Schiff base fillers were characterized using IR and UV. TG-DSC was used to characterize the stability of the fillers. The thermochromism properties and infrared emissivity at 3-5?m and 8-14 ?m of the fillers and coatings were measured at 20-40℃. The results show that the addition of the two kinds of adhesives barely affects the thermochromism properties. The infrared emissivity of the coating constructed by EP is closer to that of the fillers. Apparently, EP is a more suitable binder to form coatings with salicylaldehyde Schiff base fillers by considering both emissivity and thermochromism.
引文
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[3]张凤,管萍,胡小玲.有机可逆热致变色材料的变色机理及应用进展[J].材料导报,2012,26(9):76-80.ZHANG Feng,GUAN Ping,HU Xiaoling.Discoloration mechanism and application of organic reversible thermochromic materials[J].Material Review,2012,26(9):76-80.
[4]Jeong J,Kumar R S,Naveen M,et al.Synthesis,thermochromic,solvatochromic and axial ligation studies of Zn-porphyrin complex[J].Inorganica Chimica Acta,2018:469.
[5]陈维春,李志,陈新龙.热致变色涂层技术研究进展[J].宇航材料工艺,2015,45(1):1-4.CHEN Weichun,LI Zhi,CHEN Xinlong.Research progress of thermochromic coating technology[J].Aerospace Materials&Technology,2015,45(1):1-4.
[6]ZHU Y,XU G,GUO T,et al.Preparation,infrared emissivity and thermochromic properties of Co deped ZnO by solid state reaction[J].Journal of Alloys&Compounds,2017,720:105-115.
[7]徐栋,陈宏书,王结良.变色材料的研究进展[J].兵器材料科学与工程,2011,34(3):87-91.XU Dong,CHEN Hongshu,WANG Jieliang.Research progress of discoloration materials[J].Ordnance Material Science and Engineering,2011,34(3):87-91.
[8]荆玉龙,张梅,唐淑娟.席夫碱的合成及其在织物用热红外伪装涂料中的应用研究[J].天津工业大学学报,2004,23(3):36-38.JING Yulong,ZHANG Mei,TANG Shujuan.Synthesis of Schiff base and its application in thermal infrared disguise coatings for fabrics[J].Journal of Tianjin Polytechnic University,2004,23(3):36-38.
[9]尤玲丽,徐国跃,孟雪,等.长链共轭聚席夫碱的合成与红外发射率性能研究[J].红外技术,2017,39(3):254-258.YOU Lingli,XU Guoyue,MENG Xue,et al.Synthesis and infrared emissivity performance of long chain conjugated polyschiff bases[J].Infrared Technology,2017,39(3):254-258.
[10]LIU N,Guoyue X U,TAN S,et al.Low Temperature Curing and Thermal Shock Resistance of Heat-Resistant Low-Infrared-Emissivity Coatings[J].Journal of Nanjing University of Aeronautics&Astronautics,2017,49(1):7-9.
[11]LI N,ZHONG M,XU Z,et al.Polyesterification synthesis of amorphous aluminum phosphate thermal radiation material with high infrared emissivity[J].Materials Letters,2017:213.
[12]余慧娟,徐国跃,邵春明,等.EPDM基涂层在8~14μm波段红外低发射率的研究[J].红外技术,2008,30(3):154-157.YU Huijuan,XU Guoyue,SHAO Chunming,et al.Infrared low emissivity of EPDM-based coatings in the 8-14μm band[J].Infrared Technology,2008,30(3):154-157.
[13]YU H,XU G,SHEN X,et al.Low infrared emissivity of polyurethane/Cu composite coatings[J].Applied Surface Science,2009,255(12):6077-6081.
[14]邵春明,徐国跃,申星梅,等.CR/PU共混粘合剂红外透明性对涂层发射率的影响[J].高分子材料科学与工程,2010,26(5):47-49.SHAO Chunming,XU Guoyue,SHEN Xingmei,et al.Effect of infrared transparency of CR/PU blend adhesive on emissivity of coatings[J].Polymer Materials Science and Engineering,2010,26(5):47-49.
[15]ZHU S P,CHEN Y,SUN J,et al.Synthesis,Characterization,Thermochromism,and Photochromism of Aromatic Aldehyde Hydrazone Derivatives[J].Journal of Chemistry,2016(6):1-8.
[16]SHI Mengyu,XU Chen,YANG Zhihong,et al.Achieving good infrared-radar compatible stealth property on metamaterial-based absorber by controlling the floating rate of Al type infrared coating[J].Journal of Alloys&Compounds,2018,764:314-322.