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. |
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