It is of great significance to prepare liners with excellent inhibition of energetic plasticizer migration and gas barrier properties. Here, we have successfully prepared magnetic iron oxide decorated reduced-graphene-oxide nanosheets (MRGO) by using ultrasound-assisted method. The obtained MRGO nanosheet-fillers were filled into hydroxyl-terminated polybutadiene (HTPB) which was exposed to a magnetic field (200 mT) to achieve ordered orientation of MRGO in the HTPB matrix (Ordered MRGO/HTPB). The laser confocal microscopy demonstrates that MRGO exhibit ordered orientation structure in HTPB matrix with good dispersion, which renders the HTPB composite liners exhibiting high gas and plasticizer barrier capability, with a reduction of 18.9 % in water vapor permeability and a decrease of 14.1 % in dibutyl phthalate (DBP) migration equilibrium concentration as compared with those of random MRGO embedded HTPB composite liners (Random MRGO/HTPB). Moreover, a theoretical model accounting for such enhanced gas/plasticizer barrier performance of HTPB due to the implantation of order aligned MRGO was established, which shows that the effective diffusion pathways of plasticizer/gas for liner penetration would be significantly enhanced when the MRGO nanosheets are oriented within the HTPB matrix. This work provides an effective and facile strategy toward the design and development of composite liners with high plasticizer/gas barrier performance for industrial applications.

中文翻译：

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通过超声/磁力辅助方法植入平行取向 Fe3O4/RGO 纳米片的增强气体和增塑剂阻隔 HTPB 复合内衬

制备具有优异的抑制含能增塑剂迁移和气体阻隔性能的衬垫具有重要意义。在这里，我们利用超声辅助方法成功制备了磁性氧化铁装饰的还原氧化石墨烯纳米片（MRGO）。将获得的 MRGO 纳米片填料填充到羟基封端的聚丁二烯 (HTPB) 中，将其暴露在磁场 (200 mT) 中，以实现 MRGO 在 HTPB 基质中的有序取向 (有序 MRGO/HTPB)。激光共焦显微镜结果表明，MRGO在HTPB基体中表现出有序取向结构，且分散性良好，使得HTPB复合材料衬垫表现出较高的气体和增塑剂阻隔能力，水蒸气透过率降低了18.9%，二丁基锡降低了14.1%邻苯二甲酸盐 (DBP) 迁移平衡浓度与随机 MRGO 嵌入 HTPB 复合内衬（随机 MRGO/HTPB）的迁移平衡浓度相比。此外，建立了一个理论模型，解释了由于植入有序排列的MRGO而增强的HTPB气体/增塑剂阻隔性能，该模型表明，当MRGO纳米片被植入时，增塑剂/气体用于内衬渗透的有效扩散路径将显着增强。面向 HTPB 矩阵。这项工作为工业应用中具有高增塑剂/气体阻隔性能的复合材料衬里的设计和开发提供了一种有效且简便的策略。