以空心玻璃微珠为无机填料,通过与聚氨酯采取物理混合的方法,经过真空除泡,浇注,高温固化,制备获得聚氨酯/玻璃微珠低介电常数复合材料。通过测试不同含量、不同粒径以及不同湿度下玻璃微珠/聚氨酯材料的介电常数,分析玻璃微珠对聚氨酯材料介电性能的影响。结果表明:添加适当比例的空心玻璃微珠,聚氨酯材料能够在保持较好机械性能的情况下获得更低的介电常数。当空心玻璃微珠含量为15%时,复合材料在保持材料原有力学性能的同时,频率106Hz时的介电常数由3.9降低到2.5左右。当复合材料在空气湿度较大的环境时,经过表面改性的复合材料的介电常数稳定性相比于未改性的稳定性好;玻璃微珠的粒径越小,复合材料的介电常数越低。
Using hollow glass microspheres (HGM) as inorganic filler,polyurethane/HGM composite materials with low dielectric constant were prepared by physical mixing,vacuum defoaming,teeming and high temperature solidifying.The effect of HGM on the dielectric properties of polyurethane materials was analyzed by testing the dielectric constants at different contents,particle sizes and humidity.The results showed that the polyurethane material presented a lower dielectric constant by adding appropriate proportion of HGM while mechanical properties could still maintain.When the HGM content was 15%,the dielectric constant of composite material,at a frequency of 106Hz,decreased from 3.9 to about 2.5.In high humidity environment,the dielectric constant stability of the surface-modified composite was better than the unmodified composite.Under the same conditions,the smaller the size of HGM,the lower the dielectric constant of the composite.
[1] Wondu Eyob,Lule Zelalem Chernet,Kim Jooheon.Fabrication of high dielectric properties and higher thermal conductivity thermoplastic polyurethane composites with CNT-covered SrTiO3[J].Polymer Testing,2022,110:107576.
[2] 李祥龙.聚氨酯树脂的研究与应用[J].中国化工贸易,2021(13):133-134.
[3] Wan L,Deng C,Chen H,et al.Flame-retarded thermoplastic polyurethane elastomer:from organic materials to nanocomposites and new prospects[J].Chemical Engineering Journal,2021,417(5):129314.
[4] Singewalda Tanja Denise,Brucknera Thomas Maximillian,Grubera Ralph,et al.Water-uptake in hollow glass microspheres and their influence on cathodic and anodic delamination along the polymer/metal-interface[J].Corrosion Science,2022,196:110045.
[5] Li R,Yang X,Li J,et al.Review on polymer composites with high thermal conductivity and low dielectric properties for electronic packaging[J].Materials Today Physics,2022,22:100594.
[6] 胥晶,吴木根,陈昕航,等.绝缘性塑料材料在电气电缆的应用研究[J].塑料科技,2022,50(3):109-112.
[7] Palani Velayuda Shanmugasundram Hari Prashanth,Jayamani Elammaran,Soon Kok Heng.A comprehensive review on dielectric composites:classification of dielectric composites[J].Renewable and Sustainable Energy Reviews,2022,157:112075.
[8] 刘展晴.聚氨酯/钛酸铜镧钠复合材料的制备及介电性研究[J].热固性树脂,2019,34(2):1-5.
[9] 韩复兴.我国空心玻璃微珠制备技术进展与发展方向[J].佛山陶瓷,2022,32(3):6-11.
[10] Anirudh S,Jayalakshmi C G,Anand Anoop,et al.Epoxy/hollow glass microsphere syntactic foams for structural and functional application-a review[J].European Polymer Journal,2022,171:111163.
[11] 闻狄江,复合材料原理[M].武汉:武汉理工大学出版社,2008,171-191.
[12] Yu Zhengbiao,Du Xiaomeng,Zhu Pengli,et al.Surface modified hollow glass microspheres-epoxy composites with enhanced thermal insulation and reduced dielectric constant[J].Materials Today Communications,2022,32:104046.
[13] 王乔逸,展雄威,陆少锋,等.聚氨酯发展及改性研究现状[J].纺织科技进展,2021(4):1-10.
[14] 张稳平,梁武侠.硅烷偶联剂在聚合物改性中的应用及研究进展[J].当代化工研究,2022(4):162-164.
[15] Yu Huijun,Tong Zongwei,Yue Sheng,et al.Effect of SiO2 deposition on thermal stability of Al2O3-SiO2 aerogel[J].Journal of the European Ceramic Society,2021,41:580-589.
[16] Singewalda T D,Brucknera T M,Grubera R,et al.Water-uptake in hollow glass microspheres and their influence on cathodic and anodic delamination along the polymer/metal-interface[J].Corrosion Science,2022,196:110045.
[17] Vahtrus M,Oras S,Antsov M,et al.Mechanical and thermal properties of epoxy composite thermal insulators filled with silica aerogel and hollow glass microspheres[J].Proceedings of the Estonian Academy of Sciences,2017,66(4):339-346.
[18] Dong Xue,Wang Mingchao,Tao Xin,et al.Properties of heat resistant hollow glass microsphere/phosphate buoyancy materials with different coatings[J].Ceramics International,2020,46(1):415-420.
[19] Loubrieu Gauthier,Gall Maelenn Le,Priour Daniel,et al.Hydrostatic strength of hollow glass microspheres composites:influencing factors and modelling[J].Composites Part C:Open Access,2022,8:100286.
[20] Cao Mengxin,Jiang Fengchun,Guo Chunhuan,et al.Interface characterization and mechanical property of an aluminum matrix syntactic foam with multi-shelled hollow sphere structure[J].Ceramics International,2022,48(13):18821-18833.
[21] Feng Yefeng,Liu Li,Qiu Hongrong,et al.Obtaining high dielectric constant and breakdown strength in composites with asymmetric MXene filler and highly insulative PVC matrix[J].Surfaces and Interfaces,2022,32:102133.
[22] Zhang Junshi,Tang Liling,Liu Lei,et al.Modeling of humidity effect on electromechanical properties of viscoelastic dielectric elastomer[J].International Journal of Mechanical Sciences,2021,193:106177.
[23] Shrestha Milan,Lu Zhenbo,Lau Gih-Keong.High humidity sensing by ‘hygromorphic’ dielectric elastomer actuator[J].Sensors and Actuators B:Chemical,2021,329:129268.
基金资助
山西省重点研发计划项目(201903D121098)
PDF
