欢迎登录材料期刊网

材料期刊网

高级检索

采用γ-甲基丙烯酰氧基丙基三甲氧基硅烷(KH-570)对氧化石墨烯(GO)进行功能化改性,得到改性氧化石墨烯(MG O ),以MG O 和苯乙烯单体的复合体系为囊壁,硬脂酸丁酯为芯材,通过种子微悬浮聚合法制备氧化石墨烯增强聚苯乙烯/硬脂酸丁酯微胶囊相变材料(MGO-MicroPCMs).利用红外光谱(IR)、X射线光电子能谱(XPS)、扫描电子显微镜(SEM)、接触角测试仪、粒度分析仪、差示扫描量热仪(DSC)、热重分析仪(TG)和纳米压痕仪等表征了MGO-MicroPCMs的化学组成、微观结构、热性能和力学性能.结果表明,MGO-MicroPCMs 为粒径分布均匀的球形结构,随着MG O 含量增加,平均粒径减小,分布变窄,密封性逐渐提高,当添加0.6%(质量分数)MGO 时微胶囊渗透性降低了32.17%,微胶囊的硬度从5.83 MPa增大到11.79 MPa,同时热稳定性和亲水性也明显改善.

Modified graphene oxide (MGO)was obtained by using graphene oxide (GO)modified with theγ-methyl-propylene (KH-570).Microcapsule phase change materials of polystyrene/butyl stearate (MGO-Mi-croPCMs),reinforced by graphene oxide,was prepared by the seeded micro-suspension polymerization using the MGO and styrene monomer composites as wall material,n-Butyl stearate as core material.The chemical compositions,microstructure,thermal stability and mechanical properties of MGO-MicroPCMs were character-ized by Fourier transform infrared spectroscopy (FT-IR),X-ray photoelectron spectroscopy (XPS),scanning e-lectron microscopy (SEM),contact angle tester,particle size analyzer,differential scanning calorimeter (DSC),thermogravimetric analyzer (TG)and nano-indenter.The results showed that MGO-MicroPCMs was a spherical structure with uniform distribution.With the increase of MGO content,the average particle diameter of the microcapsules was reduced,the sealing property of microcapsules increased,permeability decreased 32.17% when the content of MGO was 0.6wt%,the hardness increased from 5.83 to 11.79 MPa,the thermal stability and hydrophilicity were also improved obviously.

参考文献

[1] Alay, S.;Alkan, C.;G?de, F..Synthesis and characterization of poly(methyl methacrylate)/n-hexadecane microcapsules using different cross-linkers and their application to some fabrics[J].Thermochimica Acta: An International Journal Concerned with the Broader Aspects of Thermochemistry and Its Applications to Chemical Problems,20111/2(1/2):1-8.
[2] V.V. Tyagi;S.C. Kaushik;S.K. Tyagi;T. Akiyama.Development of phase change materials based microencapsulated technology for buildings: A review[J].Renewable & sustainable energy reviews,20112(2):1373-1391.
[3] Jun-Feng Su;Xin-Yu Wang;Hua Dong.Influence of temperature on the deformation behaviors of melamine-formaldehyde microcapsules containing phase change material[J].Materials Letters,2012:158-161.
[4] Salaün, F.;Devaux, E.;Bourbigot, S.;Rumeau, P..Thermoregulating response of cotton fabric containing microencapsulated phase change materials[J].Thermochimica Acta: An International Journal Concerned with the Broader Aspects of Thermochemistry and Its Applications to Chemical Problems,20101/2(1/2):82-93.
[5] Salaun, F;Devaux, E;Bourbigot, S;Rumeau, P.Development of Phase Change Materials in Clothing Part I: Formulation of Microencapsulated Phase Change[J].Textile research journal,20103(3):195-205.
[6] Haibo Li;Wenjun Kang;Lei Wang.Synthesis of three-dimensional flowerlike nitrogen-doped carbons by a copyrolysis route and the effect of nitrogen species on the electrocatalytic activity in oxygen reduction reaction[J].Carbon: An International Journal Sponsored by the American Carbon Society,2013:249-257.
[7] 时雨荃;蔡明建.无机纳米粒子填充相变微胶囊壁的研究[J].高分子材料科学与工程,2006(6):201-204.
[8] Preparation And Performance Of Form-stable Polyethylene Glycol/silicon Dioxide Composites As Solid-liquid Phase Change Materials[J].Applied energy,20092(2):170-174.
[9] Williams, Mark;Warren, Nicholas J.;Fielding, Lee A.;Armes, Steven P.;Verstraete, Pierre;Smets, Johan.Preparation of Double Emulsions using Hybrid Polymer/Silica Particles: New Pickering Emulsifiers with Adjustable Surface Wettability[J].ACS applied materials & interfaces,201423(23):20919-20927.
[10] Sadeghpour, A.;Pirolt, F.;Glatter, O..Submicrometer-sized pickering emulsions stabilized by silica nanoparticles with adsorbed oleic acid[J].Langmuir: The ACS Journal of Surfaces and Colloids,201320(20):6004-6012.
[11] Chen Liang;Xu Lingling;Shang Hongbo;Zhang Zhibin.Microencapsulation Of Butyl Stearate As A Phase Change Material By Interfacial Polycondensation In A Polyurea System[J].Energy conversion & management,20093(3):723-729.
[12] Chen, T;Colver, PJ;Bon, SAF.Organic-inorganic hybrid hollow spberes prepared from TiO2-stabilized pickering emulsion polymerization[J].Advanced Materials,200717(17):2286-2289.
[13] Qiao, He;Wang, Runguo;Yao, Hui;Zhou, Xinxin;Lei, Weiwei;Hu, Xiaoran;Zhang, Liqun.Preparation of graphene oxide/bio-based elastomer nanocomposites through polymer design and interface tailoring[J].Polymer chemistry,201534(34):6140-6151.
[14] Teo, Guo Hui;Ng, Yun Hau;Zetterlund, Per B.;Thickett, Stuart C..Factors influencing the preparation of hollow polymer-graphene oxide microcapsules via Pickering miniemulsion polymerization[J].Polymer: The International Journal for the Science and Technology of Polymers,2015:1-9.
[15] 叶国锐;晏义伍;曹海琳.氧化石墨烯改性玄武岩纤维及其增强环氧树脂复合材料性能[J].复合材料学报,2014(6):1402-1408.
[16] Su-Gwang Jeong;Jisoo Jeon;Okyoung Chung;Sughwan Kim;Sumin Kim.Evaluation of PCM/diatomite composites using exfoliated graphite nanoplatelets (xGnP) to improve thermal properties[J].Journal of thermal analysis and calorimetry,20132(2):689-698.
[17] 卢荣;王静;李亚敏;徐抗震;郑晓燕.三聚氰胺-甲醛树脂微胶囊相变材料包封率影响因素[J].化学工程,2011(12):26-30,39.
上一张 下一张
上一张 下一张
计量
  • 下载量()
  • 访问量()
文章评分
  • 您的评分:
  • 1
    0%
  • 2
    0%
  • 3
    0%
  • 4
    0%
  • 5
    0%