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《合成橡胶工业》[ISSN:1000-1255/CN:10-2023/TQ]

期数:

2025年02

页码:

118-122

栏目:

出版日期:

2025-03-15

文章信息/Info

Title:

Preparation of high gas barrier organic clay/natural rubber composites by static hot pressing method

文章编号:

1000-1255（2025）02-0118-05

作者:

王林艳; 梁玉蓉; 张一铎; 刘钰溪

太原工业学院 材料工程系，太原 030008

Author(s):

WANG Lin-yan;  LIANG Yu-rong;  ZHANG Yi-duo;  LIU Yu-xi

Department of Materials Engineering, Taiyuan Institute of Technology , Taiyuan 030008, China

关键词:

有机黏土; 天然橡胶; 静态热压法; 硫化特性; 力学性能; 气体阻隔性能; 微观结构; 微观形貌

Keywords:

organic clay;  natural rubber;  static hot pressing method; curing characteristics;  mecha-nical property;  gas barrier property;  microstructure;  micromorphology

分类号:

TQ 332.5

DOI:

DOI:10.19908/j.cnki.ISSN1000-1255.2025.02.0118

文献标识码:

A

摘要:

采用静态热压法制备了有机黏土（OC）/天然橡胶（NR）复合材料，表征了复合材料的微观结构与微观形貌，考察了OC用量对复合材料的硫化特性、力学性能和气体阻隔性能的影响。结果表明，将OC填充进NR后，OC/NR复合材料的交联密度增大，但OC片层会阻隔橡胶基体与硫化助剂发生反应，使硫化助剂不能迅速参与交联反应，造成橡胶硫化延迟。随着OC用量的增加，复合材料的Payne效应增强、拉伸强度先升高后降低。当OC用量为3份（质量，下同）时，复合材料的拉伸强度为21.4 MPa，优于纯NR。OC片层均匀分散在NR胶乳中，组装在亚微米级别的NR乳胶颗粒周围形成隔离网络结构，更有助于阻隔气体小分子的扩散和延长路径。当OC用量为7份时，复合材料的气体渗透系数较纯NR下降了47.7%。

Abstract:

Organic clay (OC)/natural rubber (NR) composites were prepared by static hot pressing method, the microstructure and morphology of the composites were characterized, and the effects of OC amount on the mechanical properties, curing characteristics and gas barrier properties of the composites were investigated. The results showed that the crosslinking density of OC/NR composite increased after OC filled into NR, but the layered OC would block the reaction between the rubber matrix and vulcanizing agent, preventing the vulcanizing agent from quickly participating in the crosslinking reaction and causing delayed vulcanization of the rubber. With the increase of OC amount, the Payne effect was enhanced and the tensile strength increased first and then decreased. The tensile strength of the OC/NR composite filled with OC of 3 phr (mass, the same below) was 21.4 MPa, which was better than pure NR. The OC layer was uniformly dispersed in NR latex and assembled around submicron sized NR latex particles to form an isolation network structure, which was more conducive to blocking the diffusion of small gas molecules and extending the path. When the amount of OC was 7 phr, the gas permeability coefficient of the composite decreased by 47.7% compared to pure NR.

参考文献/References

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备注/Memo

备注/Memo:

太原工业学院引进人才科研资助项目（2023 KJ 018）；太原工业学院第五届青年学科带头人资助项目（202307）。

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