| 微波辅助改性海泡石补强天然橡胶的研究 |
| Study on NR Reinforced by Microwave-assisted Modified Sepiolite |
| 投稿时间：2022-03-09 修订日期：2022-03-09 |
| DOI：10.12136/j.issn.1000-890X.2023.07.0497 |
| 中文关键词: 天然橡胶 海泡石 酸活化 补强 动态力学性能 |
| 英文关键词: NR sepiolite acid activation reinforce dynamic mechanical property |
| 基金项目:绿色轻工材料湖北省重点实验室开放基金项目（201906A07，202107A05） |
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| 中文摘要: |
| 采用微波辅助酸活化工艺和硅烷偶联剂KH570（简称KH570）表面修饰得到改性海泡石，将其与炭黑N550并用补强天然橡胶（NR），研究海泡石改性前后的结构变化及其与炭黑N550并用对NR复合材料性能的影响。结果表明：KH570与酸活化海泡石表面—OH反应并包覆其表面，改性海泡石的亲油接触角减小，改性海泡石与NR的相容性提高；随着改性海泡石用量的增大，改性海泡石/炭黑N550/NR复合材料的硫化时间延长，拉伸强度和拉断伸长率增大，压缩永久变形先减小后增大，耐老化性能提高，储能模量、损耗模量和损耗因子呈减小趋势；当改性海泡石/炭黑N550用量比为30/10时，改性海泡石/炭黑N550/NR复合材料的拉伸强度和拉断伸长率最大。 |
| 英文摘要: |
| 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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