多壁碳纳米管/硬脂酸-十八醇@脲醛树脂微胶囊的制备及表征  

Preparation and characterization of MWCNTs/stearic acid-octadecyl alcohol@urea formaldehyde resin phase change microencapsules

作　　者：王俊霞 王军[1,2] 黄崇杏 卢立新[1,2] 高德 WANG Junxia;WANG Jun;HUANG Chongxing;LU Lixin;GAO De(School of Mechanical Engineering, Jiangnan University. Wuxi 214122. China;Jiangsu Key Laboratory of Advanced Food Manufacturing Equipment and Technology, Wuxi 214122, China;Light industry and Food Engineering College, (juangxi University, Nanning 530004 , China;Ningbo Institute of Technology, Zhejiang University, Ningbo 315100, China)

机构地区：[1]江南大学机械工程学院,无锡214122 [2]江苏省先进食品装备制造技术重点实验室,无锡214122 [3]广西大学轻工与食品工程学院,南宁530004 [4]浙江大学宁波理工学院,宁波315100

出　　处：《复合材料学报》2019年第3期730-738,共9页Acta Materiae Compositae Sinica

基　　金：国家一流学科建设轻工技术与工程(LITE 2018-29);国家自然科学基金(51205167);江苏省自然科学基金(BK20151128);江苏省333工程(BRA20131360)

摘　　要：通过原位聚合法以硬脂酸-十八醇低共融复合相变材料(SA-OA,质量比为50.02%,相变温度为55℃)为芯材,三聚氰胺改性的脲醛树脂(UF)为壁材,氨基化多壁碳纳米管(MWCNTs-NH2)为高导热填料制备了MWCNTs/SA-OA@UF相变微胶囊。采用FTIR、SEM、DSC、TGA和导热系数仪,对MWCNTs/SA-OA@UF相变微胶囊的化学结构、表面形貌、相变性能和导热性能进行表征。讨论了不同的MWCNTs修饰方法、不同乳化剂种类和MWCNTs-NH2添加量对SA-OA@UF相变微胶囊的影响。结果表明:MWCNTs-NH2在溶液中分散性良好;十二烷基苯磺酸钠(SDBS)和曲拉通X-100复配乳化剂使SA-OA@UF相变微胶囊的表面形貌更加光滑平整;添加质量比为0.5%的MWCNTs-NH2,使MWCNTs/SA-OA@UF相变微胶囊的导热系数达到0.224W/(m·K),提高了38%(55℃),包覆率提高了6.9%,粒度更加均一,热稳定性有明显提高。The multi-walled carbon nanotubes/stearic acid-octadecyl alcohol@urea formaldehyde resin(MWCNTs/SA-OA@UF)phase change microcapsules with SA-OA eutectic composite phase change materials(at the mass ratio of 50.02%,phase change temperature was 55℃)as core material,UF modified by melamine as wall material and amino multi-walled carbon nanotubes(MWCNTs-NH2)as highly thermally conductive filler were prepared by using in-situ polymerization method.The chemical structure,morphology,thermal properties and thermal conductivity of the MWCNTs/SA-OA@UF phase change microcapsules were characterized by FTIR,SEM,DSC,TGA and thermal conductivity meter.The effects of different MWCNT modification methods,different types of emulsifiers and the amount of MWCNTs-NH2 added in the SA-OA@UF phase change microcapsules were discussed.The results show that the MWCNTs-NH2 have good dispersibility in the solution;The compounded emulsifiers of sodium dodecyl benzene sulfonate(SDBS)and Triton X-100 make the surface morphology of the SA-OA@UF phase change microcapsules smoother and smoother;The addition of MWCNTs-NH2 with the mass ratio of 0.5% make the MWCNTs/SA-OA@UF phase change microcapsule’s thermal conductivity reaches 0.224 W/(m·K),which increases by38%(55℃),the coating rate increases by 6.9%,the particle size is more uniform and the thermal stability is significantly improved.

关 键 词：多壁碳纳米管 复合材料 微胶囊 热性能 蓄热材料 

分 类 号：TB332[一般工业技术—材料科学与工程]