Li Jiaye, Yang Zhanghao, Hu Shanjun, Huang Xianhong, Jerrams Stephen, Hu Shui, Liu Li, Wen Shipeng
State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China.
Zhongce Rubber Group Co., Ltd., Hangzhou 310000, China.
Nanomaterials (Basel). 2024 Mar 18;14(6):534. doi: 10.3390/nano14060534.
The high elasticity and excellent gas barrier properties of rubber composites make them irreplaceable in the field of sealing. Constructing a complicated barrier network to reduce free volume is crucial to improving gas barrier properties. In this research, liquid acrylonitrile-butadiene rubber/γ-Methacryloxypropyl trimethoxy silane (KH570) modified graphene oxide/butyl rubber composites (LNBR/KGO/IIR) were fabricated. A KGO lamellar network was constructed to resist gas diffusion in the IIR matrix. Meanwhile, LNBR macromolecules further occupied the free volume inside the IIR composites, thereby maximizing the retardation of the path of small molecule gas permeation. The modification of GO by KH570 was successfully demonstrated through FTIR and XRD. The grafting rate of KH570 was calculated to be approximately 71.4%. KGO was well dispersed in IIR due to emulsion compounding and the formation of lamellar networks. The 300% modulus, tensile strength and tear strength of KGO/IIR were improved by 43.5%, 39.1% and 14.8%, respectively, compared to those of the IIR composite. In addition, the introduction of LNBR resulted in a 44.2% improvement in the gas barrier performance of nitrogen permeability relative to the original IIR composite.
橡胶复合材料的高弹性和优异的气体阻隔性能使其在密封领域具有不可替代的地位。构建复杂的阻隔网络以减少自由体积对于提高气体阻隔性能至关重要。在本研究中，制备了液态丙烯腈-丁二烯橡胶/γ-甲基丙烯酰氧基丙基三甲氧基硅烷（KH570）改性氧化石墨烯/丁基橡胶复合材料（LNBR/KGO/IIR）。构建了KGO层状网络以阻止气体在IIR基体中扩散。同时，LNBR大分子进一步占据了IIR复合材料内部的自由体积，从而最大限度地延缓小分子气体渗透路径。通过FTIR和XRD成功证明了KH570对GO的改性。计算得出KH570的接枝率约为71.4%。由于乳液共混和层状网络的形成，KGO在IIR中分散良好。与IIR复合材料相比，KGO/IIR的300%模量、拉伸强度和撕裂强度分别提高了43.5%、39.1%和14.8%。此外，相对于原始IIR复合材料，LNBR的引入使氮气渗透率的气体阻隔性能提高了44.2%。
