| 天然橡胶/改性剑麻纤维素微晶复合材料的性能研究 |
| Preparation and Property of NR/Modified Sisal Cellulose Microcrystalline Composites |
| 投稿时间：2022-12-21 修订日期：2022-12-21 |
| DOI：10.12136/j.issn.1000-890X.2024.09.0683 |
| 中文关键词: 天然橡胶 剑麻纤维素微晶 硫化特性 物理性能 |
| 英文关键词: NR sisal cellulose microcrystalline vulcanization characteristic physical property |
| 基金项目:广西科技计划项目(桂科AB21220060) |
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| 中文摘要: |
| 以剑麻纤维素为原材料提取剑麻纤维素微晶（SCF），以硬脂酸（SA）为改性剂制备硬脂酸改性剑麻纤维素微晶（SA-g-SCF），研究SA-g-SCF用量对天然橡胶（NR）/SA-g-SCF复合材料性能的影响。结果表明：随着SA-g-SCF用量的增大，NR/SA-g-SCF复合材料的Fmax－FL增大，t90呈延长趋势；与未加入SA-g-SCF的NR胶料相比，加入5份SA-g-SCF的NR/SA-g-SCF复合材料的t90基本不变，而硫化速率指数增大；随着SA-g-SCF用量的增大，NR/SA-g-SCF复合材料的邵尔A型硬度、100%定伸应力和300%定伸应力增大，拉伸强度先增大后减小；SA-g-SCF用量为5份的NR/SA-g-SCF复合材料的断面未有明显的团聚体，其拉伸强度最大（25.4 MPa），综合性能最佳。 |
| 英文摘要: |
| The sisal cellulose microcrystalline（SCF） was extracted using sisal cellulose as raw material，the stearic acid modified sisal cellulose microcrystalline （SA-g-SCF）was prepared using stearic acid（SA） as modifier，and the effect of the SA-g-SCF dosage on the properties of the natural rubber（NR）/SA-g-SCF composites was studied.The results showed that，with the increase of the SA-g-SCF dosage，the Fmax－FL of the NR/SA-g-SCF composite increased，and the t90 showed an extended trend.Compared with the NR compound without SA-g-SCF，the t90 of NR/SA-g-SCF composite with 5 phr SA-g-SCF was basiclly unchanged，but the vulcanization rate index increased.With the increase of the SA-g-SCF dosage，the Shore A-type hardness，modulus at 100% elongation and modulus at 300% elongation of the NR/SA-g-SCF composite increased and the tensile strength first increased and then decreased.NR/SA-g-SCF composite with 5 phr SA-g-SCF showed no obvious aggregates on the cross-section and had the highest tensile strength（25.4 MPa），with the best overall performance. |
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