以聚醚砜(PES)为基体、氧化石墨烯(GO)和碳纳米管(CNT)为填料,利用溶剂冷冻模板法,制备了PES/GO和PES/CNT气凝胶材料。通过扫描电子显微镜、导热系数仪、红外热成像仪、力学试验机等对气凝胶材料进行表征。结果表明,通过定向冷冻和升华溶剂获得微观取向的孔道结构保证了气凝胶优异的隔热性能和力学性能。随着纳米碳材料和PES基体含量的变化,气凝胶的导热系数在0.0307～0.0698W/(m·K)之间,压缩强度在0.2～1.0MPa(30%应变),而纳米碳材料的加入使得导热系数和压缩强度存在平衡关系。
Polyethersulfone/graphene oxide (PES/GO) and polyethersulfone /carbon nanotube (PES/CNT) aerogels were prepared using PES as matrix and GO and CNT as fillers by solvent freezing template method.The aerogel materials were characterized by scanning electron microscope (SEM),thermal conductivity meter,infrared thermal imager and mechanical testing machine.The results indicated that the microscopic oriented pore structure was obtained by direction freezing and sublimating solvent,which made the aerogels possess excellent thermal insulation and mechanical properties.With the variation of the content of nanocarbon material and PES matrix,the thermal conductivity of aerogels was from 0.0307 to 0.0698W/(m·K),and the compressive strength was from 0.2 to 1.0MPa (30%strain).Moreover,the balance between thermal conductivity and compressive strength was kept by adding the nanocarbon materials.
[1] Aditya L,Mahlia T M I,Rismanchi B,et al.A review on insulation materials for energy conservation in buildings[J].Renew Sust Energ Rev,2017,73:1352-1365.
[2] Abu-Jdayil B,Mourad A H,Hittini W,et al.Traditional,state-of-the-art and renewable thermal building insulation materials:an overview[J].Constr Build Mater,2019,214:709-735.
[3] Villasmil W,Fischer L J,Worlitschek J.A review and evaluation of thermal insulation materials and methods for thermal energy storage systems[J].Renew Sust Energ Rev,2019,103:71-84.
[4] Illera D,Mesa J,Gomez H,et al.Cellulose aerogels for thermal insulation in buildings:trends and challenges[J].Coat,2018,8:345.
[5] 徐威,孟平蕊,李良波.耐热性高分子材料研究的新进展[J].山东建材,1994(4):43-45.
[6] Thiruchitrambalam M,Kumar B D,Shanmugam D,et al.A review on PEEK composites-manufacturing methods,properties and applications[J].Mater Today:Proc,2020,33:1085.
[7] 郭艳秋,聂佳,赵巍,等.ZrO2/TiO2/FEVE复合隔热涂料的制备及其性能[J].化工新型材料,2022,50(7):125-129.
[8] 蹇锡高,陈平,廖功雄,等.含二氮杂荼酮结构新型聚芳醚系列高性能聚合物的合成与性能[J].高分子学报,2003(4):469-475.
[9] Mark J E.Physical properties of polymers handbook[M].2nd.New York:Springer,2007.
[10] Honkhambe P N,Avadhani C V,Wadgaonkar P P,et al.Synthesis and characterization of new aromatic polyesters containing biphenyl side groups[J].J Appl Polym Sci,2007,106:3105-3110.
[11] Yang J,Shen A,Velankar S S.The preparation and thermomechanical properties of high-temperature foams based on thermoplastic poly(phthalazinone ether ketone)[J].J Appl Polym Sci,2020,138:46966.
[12] Sun G,Yang L,Liu R.Thermal insulation coatings based on microporous particles from pickering emulsion polymerization[J].Prog Org Coat,2021,151:106023.
[13] Horikawa T,Hayashi J,Muroyama K.Size control and characterization of spherical carbon aerogel particles from resorcinol-formaldehyde resin[J].Carbon,2004,42:169-175.
[14] Li Z,Peng Y,Dong Y,et al.Effects of thermal efficiency in DCMD and the preparation of membranes with low thermal conductivity[J].Appl Surf Sci,2014,317:338-49.
[15] Zhou L,Rada J,Zhang H,et al.Sustainable and inexpensive polydimethylsiloxane sponges for daytime radiative cooling[J].Adv Sci,2021,8:2102502.
[16] Xie C,Liu S,Zhang Q,et al.Macroscopic-scale preparation of aramid nanofiber aerogel by modified freezing-drying method[J].ACS Nano 2021,6:10000-10009.
[17] Deville S.Ice-templating,freeze casting:beyond materials processing[J].J Mater Res,2013,28:2202-2219.
[18] 王逸飞,王新承,李翠清,等.气凝胶的制备及催化应用进展[J].化工新型材料,2022,50(12):50-55.
[19] Flauder S,Heinze T,Muller F A.Cellulose scaffolds with an aligned and open porosity fabricated via ice-templating[J].Cellulose,2014,21:97-103.
[20] Yuan R,Zhou Y,Lu X,et al.Rigid and flexible polyimide aerogels with less fatigue for use in harsh conditions[J].Chem Eng J,2022,428:131193.
[21] Min P,Li X,Liu P,et al.Rational design of soft yet elastic lamellar graphene aerogels via bidirectional freezing for ultrasensitive pressure and bending sensors[J].Adv Funct Mater,2021,31:2103703.
[22] Peng X,Wu K,Hu Y,et al.A mechanically strong and sensitive CNT/rGO-CNF carbon aerogel for piezoresistive sensors[J].J Mater Chem A,2018,6:23550-23559.
基金资助
中国石化科技发展项目(320085,321057)
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