• 文献标题:   Constructing Oriented Two-Dimensional Large-Sized Modified Graphene Oxide Barrier Walls in Brominated Butyl Rubber to Achieve Excellent Gas Barrier Properties
  • 文献类型:   Article
  • 作  者:   YANG SQ, WU H, LI CH, XIONG Y, GUO SY
  • 作者关键词:   oriented 2d largesized mgo barrier wall, gas impermeability, brominated butyl rubber, graphene, pickering emulsion
  • 出版物名称:   ACS APPLIED MATERIALS INTERFACES
  • ISSN:   1944-8244 EI 1944-8252
  • 通讯作者地址:   Sichuan Univ
  • 被引频次:   0
  • DOI:   10.1021/acsami.9b19802
  • 出版年:   2020

▎ 摘  要

Brominated butyl rubber (BIIR) is widely used as tire lining, medical sealing material, and so on, due to its merits like high strength, low permeability, and high vulcanization activity. However, the gas barrier properties of BIIR need to be improved further to meet the requirements of certain special conditions such as high pressure (aircraft tire: 1.5 MPa). In this work, oriented two-dimensional (2D) large-sized modified graphene oxide (mGO) barrier walls in BIIR are successfully constructed based on the following processes: three-dimensional (3D) large-sized mGO hollow spherical shells in BIIR matrix are achieved from the core (water)-shell (mGO) structure in BIIR solution, which is obtained through the Pickering emulsion template method, and then are pressed into oriented 2D large-sized mGO barrier walls in the BIIR matrix. Such oriented 2D large-sized mGO barrier walls not only have an extremely large size between 50 and 120 mu m but also are aligned perpendicular to the gas diffusion direction. Thus, even only with 0.7 wt % mGO, the nitrogen permeability of the BIIR composite is reduced by 91% relative to pristine BIIR and by 40% relative to the comparing sample with small mGO sheets. Therefore, this work provides a route to regulate the distribution of GO and thus can be a useful reference to fabricate rubber composites with superior gas barrier properties.