文章摘要
Study on NR Reinforced by Microwave-assisted Modified Sepiolite
Received:March 09, 2022  Revised:March 09, 2022
DOI：10.12136/j.issn.1000-890X.2023.07.0497
Key Words: NR；sepiolite；acid activation；reinforce；dynamic mechanical property
Author NameAffiliationE-mail
Li Jing Hubei University of Technology 1876622636@qq.com 
Lei Qianjie Hubei University of Technology  
Meng Ziyi Hubei University of Technology  
Liu Yongming Beihang University  
JIANG Hao Wuhan Troowin Power System Technology Co.，Ltd  
Liu Qingting* Hubei University of Technology liuqt@hbut.edu.cn 
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Abstract:
      The modified sepiolite was prepared by microwave assisted acid activation process and silane coupling agent KH570（referred to as KH570）surface modification，and it was blended with carbon black N550 to reinforce natural rubber（NR），the structure change of the sepiolite before and after modification and the effect of the blending of sepiolite and carbon black N550 on the properties of NR composites were studied.The results showed that KH570 reacted with acid activated sepiolite surface —OH and coated its surface，the lipophilic contact angle of modified sepiolite was decreased and the compatibility between modified sepiolite and NR increased.With the increase of the dosage of modified sepiolite，the curing time of the modified sepiolite/carbon black N550/NR composite was prolonged，the tensile strength and elongation at break increased，the compression set decreased at first and then increased，the aging resistance was improved，and the storage modulus，loss modulus and loss factor showed a decreasing trend.When the dosage ratio of modified sepiolite/carbon black N550 was 30/10，the tensile strength and elongation at break of modified sepiolite/carbon black N550/NR composites were the largest.
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