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摘要
采用聚乙烯吡咯烷酮(PVP)表面修饰氧化石墨烯(GO),两亲性的GO与溴化丁基橡胶(BIIR)的甲苯溶液以一定的体积比混合,在热力学驱动下组装在乳液颗粒的油/水界面处,形成油包水的均匀稳定的皮克林乳液。系统考察了皮克林乳液油水的体积比对网络结构的影响,考察了GO用量对GO/BIIR纳米复合材料力学性能、动态热机械性能、分散相态和气体阻隔性能的影响。结果表明:随着GO含量的增加,复合材料的各项力学性能均优于纯BIIR,拉伸强度先上升后下降,1.0% GO/BIIR复合材料的拉伸强度为10.5MPa,较纯BIIR的7.1MPa提高了47.9%。GO/BIIR复合材料的玻璃化温度(Tg)随GO含量的增加依次上升,损耗峰值依次降低。皮克林乳液所形成的隔离网络结构,延长了气体分子的扩散路径,随着GO含量的增加,复合材料的渗透系数迅速下降。3.0% GO/BIIR复合材料的渗透系数较BIIR的渗透系数下降了61%。制备的高气体阻隔性GO/BIIR复合材料,有望应用于轮胎气密层、食品药品包装、个人防护器材等密封领域。
Abstract
Graphene oxide (GO) was surface-modified with polyvinylpyrrolidone (PVP).The amphiphilic GO was mixed with a toluene solution of bromobutyl rubber (BIIR) at a specific volume ratio.Under thermodynamic driving,the mixture assembled at the oil/water interface of emulsion particles,forming a uniform and stable oil-in-water Pickering emulsion.The study investigated the effect of the volume ratio of oil to water in Pickering emulsions on network structure,and examined the influence of GO dosage on the mechanical properties,dynamic thermomechanical behaviour,dispersed phase state,and gas barrier performance of GO/BIIR nanocomposites.The experimental results indicated that as the GO content increased,the mechanical properties of the composite material consistently outperformed those of pure BIIR.Tensile strength initially rose and then decreased.The 1.0% GO/BIIR composite exhibited a tensile strength of 10.5MPa,representing a 47.9% improvement over the 7.1MPa recorded for pure BIIR.The glass transition temperature (Tg) of the GO/BIIR composite increased sequentially with rising GO content,while the peak loss decreased correspondingly.The isolation network structure formed by Pickering emulsions prolonged the diffusion path of gas molecules.As the GO content increased,the permeability coefficient of the composite material decreased rapidly.The permeability coefficient of the 3.0% GO/BIIR composite decreased by 61% compared to that of BIIR.The prepared GO/BIIR composite with high gas barrier properties holds promise for applications in sealing fields such as tire airtight layers,food and pharmaceutical packaging,and personal protective equipment.
关键词
氧化石墨烯
/
溴化丁基橡胶
/
皮克林乳液
/
气体阻隔性能
Key words
graphene oxide
/
bromobutyl rubber
/
Pickering emulsion
/
gas barrier properties
氧化石墨烯/溴化丁基橡胶复合材料的制备与性能[J].
化工新型材料, 2026, 54(8): 105-109 DOI:10.19817/j.cnki.issn1006-3536.2026.08.031
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基金资助
太原工业学院引进人才科研资助项目(2023KJ018);太原工业学院第五届青年学科带头人资助项目(202307);生物质绿色甲醇转化及氢能利用厅市共建山西省重点实验室培育基地开放课题资助项目(2025TITSKL05)
