掺杂钨纳米二氧化钒控温微胶囊的合成与表征
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摘要
通过界面聚合法制备以阴离子石蜡为芯材,掺杂钨纳米二氧化钒(W-VO_2)与羧甲基纤维素改性聚甲基丙烯酸甲酯(CMC-PMMA)为壳材的双层智能控温微胶囊(PCM/W-VO_2),并研究了其形貌、结构、成分及相关性能。结果表明,PCM/W-VO_2微胶囊形态完整,表面附着一定量的W-VO_2颗粒,平均粒径为12μm,石蜡含量约为50. 06%,相变温度为41. 2℃,熔融焓为48. 96 J/g。与传统微胶囊(PCM)相比较,PCM/W-VO_2微胶囊随着温度的升高,质量损失减小,失重曲线明显向后推移,具有良好的热稳定性;同时,微胶囊的释放速度慢,密封性能良好,可以长期保存;温升曲线表明,PCM/W-VO_2微胶囊也具有很好的导热性能。
Double-shells intelligent temperature-control phase change microcapsules( PCM/W-VO_2)had been prepared by interfacial polymerization approach using anionic paraffin as core-materials and W-VO_2-CMC/PMMA as shell-materials. Then the morphology, structure, ingredient and some properties were examined by SEM,FT-IR,DSC and so on. The results show that the average diameter of PCM/W-VO_2 microcapsules is 12 μm,which contains 50. 06% paraffin and the phase-transition temperature is 41. 2 ℃.The melting enthalpy value is 48. 96 J/g. Comparing with the traditional microcapsules,the mass loss rate of PCM/W-VO_2 microcapsules could reduce with the increase of temperature and the weight loss curves could move downstream,which exhibits good thermal stability. Release rates from these microcapsules are lower than conventional PCM,which indicates they have good sealing properties and could be stored for a long time.And the temperature rise curve reveals that PCM/W-VO_2 microcapsules display excellent heat-conducting property.
Double-shells intelligent temperature-control phase change microcapsules( PCM/W-VO_2)had been prepared by interfacial polymerization approach using anionic paraffin as core-materials and W-VO_2-CMC/PMMA as shell-materials. Then the morphology, structure, ingredient and some properties were examined by SEM,FT-IR,DSC and so on. The results show that the average diameter of PCM/W-VO_2 microcapsules is 12 μm,which contains 50. 06% paraffin and the phase-transition temperature is 41. 2 ℃.The melting enthalpy value is 48. 96 J/g. Comparing with the traditional microcapsules,the mass loss rate of PCM/W-VO_2 microcapsules could reduce with the increase of temperature and the weight loss curves could move downstream,which exhibits good thermal stability. Release rates from these microcapsules are lower than conventional PCM,which indicates they have good sealing properties and could be stored for a long time.And the temperature rise curve reveals that PCM/W-VO_2 microcapsules display excellent heat-conducting property.
引文
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[4]ZHOU Z H,WANG C D,SUN X H,et al.Heating energy saving potential from building envelope design and operation optimization in residential buildings[J].J Clean Prod,2018,174:413-423.
[5]YI L W,RU C.New insulating coating with characteristics of sand texture and imitation ceramic[J].Constr Build Mater,2014.57(30):9-14.
[6]GEINTS Y,PANINA E,ZEMLYANOV A.Peculiarities of light absorption by spherical microcapsules[J].Opt Quantum Electron,2018,50(2):3-11.
[7]徐得华,靳虎,徐雪青.多功能智能型反射隔热涂料的制备与性能表征[J].化工进展,2017,36(9):3388-3394.
[8]刘文涛,元强,谢宏.功能填料对反射隔热涂料隔热性能影响的研究[J].涂料工业,2016,46(12):22-28.
[9]王艳,林金斌,詹俊英.相变微胶囊的制备及其在隔热保温涂料中的应用[J].中国涂料,2016,31(2):20-24.
[10]YANG Y,WEI Z J,WANG C Y,et al.Versatile fabrication of nanocomposite micro capsules with controlled shell thickness and low permeability[J].ACS Appl Mater Interfaces,2013,5(7):2495-2502.
[11]AL N R,BOLOGNESI G,VLADISAVLJEVIC G T.Microfluidic production of poly(1,6-hexanediol diacrylate)-based polymer microspheres and bifunctional microcapsules with embedded Ti O2nanoparticles[J].ACS J Surfaces Colloids,2018,34(39):11822-11831.
[12]陆少锋,申天伟,宋庆文,等.聚脲/聚氨酯双层微胶囊相变材料的制备及应用[J].合成纤维工业,2017,40(4):19-23.
[13]王轩,朱金华,王紫潇.芯材制备条件对聚脲石蜡相变微胶囊性能的影响[J].高分子材料科学与工程,2016,32(5):124-129.
[14]覃源,李毅,方宝英,等.钨钒共溅掺杂二氧化钒薄膜的制备及其光学特性[J].光学学报,2013,33(12):351-356.
[15]王新刚,田阳,郭一凡,等.掺钨VO2纳米粉体的制备及其热致相变特能的研究[J].中国陶瓷,2017,53(4):13-18.
[16]胡晓峰,黄占华.羧甲基纤维素/蜜胺树脂相变纳米储能材料的制备与表征[J].森林工程,2012,15(4):61-64,76.