掺杂钨VO_2微胶囊智能控温包装纸的制备及性能
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摘要
为了改善传统型隔热控温材料在控温性及防水性等方面存在的不足,以及不能精确控制温度范围而用于化学药品、精密仪器等物品保护的缺陷。以水性丙烯酸树脂为主要成膜物,掺杂钨二氧化钒微胶囊(PCMs/WVO_2)为填料,辅以流平剂、防水剂等制备出PCMs/W-VO_2智能控温水性涂料,涂布于白卡纸,制成PCMs/W-VO_2智能控温包装纸,通过SEM、FTIR、EDS、DSC对样品形貌、结构、相变性能进行了分析,并测试了其隔热温差、接触角及机械性能。结果表明:制得的包装纸相变温度为45℃,包装原纸近红外透射率为78%,而智能控温包装纸的透射率只有46%,隔热温差可达10.7℃,具有优异的隔热控温性能;EDS结果表明,智能控温包装纸表面含有PCMs/W-VO_2微胶囊和适量防水剂;SEM结果表明,微胶囊均匀分布在纸页表面,接触角明显增大,说明纸页具有较好的疏水性;纸页物理性能有所提高,考虑到涂料成本,其抗张指数和撕裂指数的最佳值分别为6.84 kN/m和22.69 (mN·m~2)/g。
In order to improve the deficiencies of traditional heat insulation materials in temperature control and water-proofing fields, which resultedin they cannot be used for the protection of chemicals, precision instruments and other items within accurate temperature range. Intelligent temperature control water-based coatings were prepared using water-based acrylic resin as film-forming material, tungsten-doped vanadium dioxide microcapsules(PCMs/W-VO_2) as insulation fillers in the presence of flattingagent, anti-water agent, etc. The resulting PCMs/W-VO_2 water-based coatings were then coated on white cardboard to prepare PCMs/W-VO_2 intelligent temperature control packaging paper. The morphology, structure,temperature control property, water contact angle and mechanical properties of samples were characterized by SEM, FTIR, EDS and DSC. The results showed that the prepared packaging paper had excellent heat insulation and temperature control performance. The phase change temperature was 45 ℃. The near-infrared transmittance of packaging paper was 78%, while that of intelligent temperature control packaging paper was only 46%. The thermal insulation temperature difference could reach 10.7 ℃. EDS analysis revealed that there were PCMs/W-VO_2 microcapsules and appropriate waterproofing agent on the surface of packaging paper. SEM results demonstrated that microcapsules were evenly distributed on the surface of the paper, and the water contact angle was improved obviously, which indicated that the prepared paper had excellent hydrophobicity. The physical properties of the paper sheet were also improved.Considering the economic factors of intelligent temperature control coating, the optimumtensile index and tearing index were 6.84 kN/m and 22.69(mN·m~2)/g, respectively.
In order to improve the deficiencies of traditional heat insulation materials in temperature control and water-proofing fields, which resultedin they cannot be used for the protection of chemicals, precision instruments and other items within accurate temperature range. Intelligent temperature control water-based coatings were prepared using water-based acrylic resin as film-forming material, tungsten-doped vanadium dioxide microcapsules(PCMs/W-VO_2) as insulation fillers in the presence of flattingagent, anti-water agent, etc. The resulting PCMs/W-VO_2 water-based coatings were then coated on white cardboard to prepare PCMs/W-VO_2 intelligent temperature control packaging paper. The morphology, structure,temperature control property, water contact angle and mechanical properties of samples were characterized by SEM, FTIR, EDS and DSC. The results showed that the prepared packaging paper had excellent heat insulation and temperature control performance. The phase change temperature was 45 ℃. The near-infrared transmittance of packaging paper was 78%, while that of intelligent temperature control packaging paper was only 46%. The thermal insulation temperature difference could reach 10.7 ℃. EDS analysis revealed that there were PCMs/W-VO_2 microcapsules and appropriate waterproofing agent on the surface of packaging paper. SEM results demonstrated that microcapsules were evenly distributed on the surface of the paper, and the water contact angle was improved obviously, which indicated that the prepared paper had excellent hydrophobicity. The physical properties of the paper sheet were also improved.Considering the economic factors of intelligent temperature control coating, the optimumtensile index and tearing index were 6.84 kN/m and 22.69(mN·m~2)/g, respectively.
引文
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[2]Zhang Li(张丽), Yang Wenbin(杨文彬), Zhang Kai(张凯), et al.Preparationandpropertiyofmelamine-formaldehyderesin/paraffin microencapsulatedphasechangematerialsmodifiedbygraphene oxide[J]. Polymer Materials Science&Engineering(高分子材料科学与工程), 2017, 33(5):147-151.
[3]ZhouZH,WangCD,SunXH,etal.Heatingenergysaving potential from building envelope design and operation optimization in residential buildings[J]. Journal of Cleaner Production, 2018, 174:413-423.
[4]MatthiasK,ArnaudR,PatrickA,etal.Aerogel-basedthermal superin-sulation:Anoverview[J].JournalofSol-GelScienceand Technology, 2012, 63(3):315-339.
[5]HajarM,LuisaD,AntónioP.Anoverviewonsilicaaerogels synthesis and different mechanical reinforcing strategies[J]. Journal of Non-Crystalline Solids, 2014, 385:55-74.
[6]Xin Cheng(辛成), Lu Shaofeng(陆少锋), Shen Tianwei(申天伟),etal.Preparationandpropertiesofnetworkpolyurethaneshell microencapsulatedphasechangematerialsviaaninterfacial polymerization[J].FineChemicals(精细化工),2018,35(7):1121-1125.
[7]Huang Ju(黄菊), Yang Ying(杨莹). Preparation and properties of transparent nano-ATO/PVB thermal insulation coating[J]. Electroplating&Finishing(电镀与涂饰), 2016, 35(2):58-62.
[8]He Yan(何燕), Zhang Xiong(张雄), Guan Jian(管建). Influence of metallicoxidepigmentonemissivityandsolarreflectanceof insulation coating[J]. Journal of Building Materials(建筑材料学报),2015, 18(5):784-789.
[9]LinMei(林美).Preparationandpropertiesofsilica-sol/acrylic emulsion composite thermal reflective insulation coatings[J]. Polymer MaterialsScience&Engineering(高分子材料科学与工程),2017,33(3):169-179
[10]Guo Junhong(郭军红), Zhang Pengzhong(张鹏中), Li Shuhui(李淑慧), et al. Preparation of microcapsule phase change materials by seeded micro-suspension polymerization[J]. Fine Chemicals(精细化工), 2016, 33(9):971-976, 983.
[11]Guo Junhong(郭军红), Yuan Qiang(元强), Xie Hong(谢宏), et al.Effects of functional fillers on thermal isolation property of reflective thermal isolation coatings[J]. Paint&Coatings Industry(涂料工业),2016, 46(12):22-28.
[12]LuzSS,JuanFR,AmayaR,etal.Preparationofcoated thermo-regulatingtextilesusingRubitherm-RT31microcapsules[J].Journal of Applied Polymer Science, 2012, 124(6):4809-4818.
[13]Ng D Q, Tseng Y L, Shih Y F, et al. Synthesis of novel phase change materialmicrocapsuleanditsapplication[J].Polymer,2017,133:250-262.
[14]ZhangJJ,ZhaoTB,ChaiYQ,etal.Preparationand characterizationofhighcontentparaffinwaxmicrocapsulesand micro/nanocapsuleswithpolymethylmethacrylateshellby suspension-likepolymerization[J].ChineseJournalofChemistry,2017, 35(4):497-506.
[15]QinYuan(覃源),LiYi(李毅),FangBaoying(方宝英),etal.Fabricationandopticalpropertiesofvanadiumdioxidethinfilms doped by tungsten-vanadium co-sputtering[J]. Acta Optica Sinica(光学学报), 2013, 33(12):351-356.
[16]Wang Xingang(王新刚), Tian Yang(田阳), Guo Yifan(郭一凡), et al.Studyonpreparationandthermalinducedphasetransition properties of W-doped VO2 nanopowder[J]. China Ceramics(中国陶瓷), 2017, 53(4):13-18.
[17]Standardization Administration of the People's Republic of China(中国国家标准化管理委员会).GB/T10335.4—2017.Coatedpaper and board—Coated folding board(涂布纸和纸板涂布白纸板)[S].Standards Press of China, 2017:1-5.
[18]Technical Association of the Pulp and Paper Industry(美国纸浆与造纸工业技术协会). Tappi 404 wd-03. Tensile Breaking Strength and ElongationofPaperandPaperboard(纸和纸板抗张强度测定)[S].TAPPI Press, 2004:1-5.
[19]Technical Association of the Pulp and Paper Industry(美国纸浆与造纸工业技术协会). Tappi 414 om-98. Internal Tearing Resistance of Paper(纸内部抗撕裂强度测试)[S]. TAPPI Press, 2004:1-6.
[20]Standardization Administration of the People's Republic of China(中国国家标准化管理委员会). GB/T 5453—1997. Textiles Determination of the permeability of fabrics to air(纺织品织物透气性的测定)[S].Standards Press of China, 1997:1-4.
[21]ConstructionIndustryStandardsAdministrationofthePeople's Republic of China(中国国家标准化管理委员会). JG/T 235—2008.Architecturalreflectivethermalinsulationcoatings(建筑反射隔热涂料)[S]. Standards Press of China, 2008:1-11.
[22]Standardization Administration of the People's Republic of China(中国国家标准化管理委员会). GB/T9271—2008. Paints and varnishes standardpanelsfortesting(色漆和清漆标准测试)[S].Standards Press of China, 2008:1-11.