Influences of interfacial adhesion on gas barrier property of functionalized graphene oxide/ultra-high-molecular-weight polyethylene composites with segregated structure
Influences of interfacial adhesion on gas barrier property of functionalized graphene oxide/ultra-high-molecular-weight polyethylene composites with segregated structure
复制标题
界面附着力对偏析结构功能化氧化石墨烯/超高分子量聚乙烯复合材料阻气性能的影响
DOI：
10.1080/09276440.2017.1269517
复制
发表时间：
2017-01-01
影响因子：
2.6
通讯作者：
Ji, Xu
中科院分区：
文献类型：
--
作者：
Hui, Jian;Ren, Peng-Gang;Ji, Xu
以超高相对分子质量聚乙烯(UHMWPE)、氧化石墨烯(GO)、十二胺(DA)官能化氧化石墨烯(DA-GO)或均匀DA-GO/高密度聚乙烯(DA-GO/HDPE)粉末为原料，采用机械共混法制备了具有不同界面粘结性能的隔离氧化石墨烯(GO)/超高相对分子质量聚乙烯(UHMWPE)复合膜。X-射线衍射仪和X射线光电子能谱分析表明，用化学方法成功地将DA链接枝到GO片材上，增强了UHMWPE粒子与GO片材之间的界面粘结。偏光显微镜和扫描电子显微镜的表征表明，只有DA-GO/UHMWPE或DA-GO/HDPE/UHMWPE复合材料才能获得良好的偏析结构。填料与基质之间的强界面粘附性对气体阻隔性能有积极的影响。与GO/UHMWPE复合膜相比，当填充量仅为0.5wt%时，O2渗透系数分别从15.4×10−14降低到8.9×10−14和8.0×10−14cm3 cm−2 S−1 Pa−1，分别降低了42.2%和48.1%。差示扫描量热分析结果表明，DA-GO/HDPE与UHWMPE之间的界面粘附性较强，而不是UHWMPE的结晶度增加，从而提高了阻隔性能。此外，UHMWPE颗粒尺寸的减小可能有利于提高复合膜的阻气性能，这是因为形成了更多垂直于膜平面的隔离层。
Abstract The segregated graphene oxide(GO)/ultra-high-molecular-weight polyethylene (UHMWPE) composite films with various interfacial adhesion property were prepared by mechanical blending method from UHMWPE, GO, dodecyl amine (DA) functionalized graphene oxide(DA–GO) or uniform DA–GO/high density polyethylene (DA–GO/HDPE) powder. The results of XRD and XPS indicated that DA chain was successfully grafted onto GO sheets via a chemical method, which enhanced the interfacial adhesion between UHMWPE particles and GO sheets. The characterizations of POM and SEM proved that good segregated structure was only obtained in DA–GO/UHMWPE or DA–GO/HDPE/UHMWPE composite. Strong interfacial adhesion between fillers and matrix exhibits positive effect on gas barrier property. Compared to the GO/UHMWPE composite film, dramatic decrease in O2 permeability coefficient by 42.2 and 48.1%, from 15.4 × 10−14 to 8.9 × 10−14 and 8.0 × 10−14 cm3 cm cm−2 s−1 Pa−1, is achieved upon the addition of only 0.5 wt% fillers, respectively. The DSC results demonstrated that the enhanced gas barrier performance was ascribed to the strong interfacial adhesion between DA–GO/HDPE and UHWMPE matrix, rather than the crystallinity of UHWMPE matrix. Additionally, the decrease in UHMWPE particle size might be conducive to improving the gas barrier property of composite films due to the formation of more isolation layers perpendicular to the film plane.