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首页> 外文期刊>Journal of Applied Polymer Science >Nanosilica as Dry Bonding System Component and as Reinforcement in Short Nylon-6 Fiber/Natural Rubber Composite
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Nanosilica as Dry Bonding System Component and as Reinforcement in Short Nylon-6 Fiber/Natural Rubber Composite

机译：纳米二氧化硅作为干式粘合体系的组分，并在短尼龙6纤维/天然橡胶复合材料中得到增强

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摘要

Nanoscale silica was synthesized by acid hydrolysis of sodium silicate using dilute hydrochloric acid under controlled conditions. The synthesized silica was characterized by SEM, BET adsorption, and XRD. The particle size of silica was calculated to be 13 nm from the XRD results and the surface area was found to be 295 m2/g by BET method. This synthesized nanosilica was used in place of conventional silica in HRH (hexamethylenetetramine, resorcinol and silica) bonding system for natural rubber/Nylon- 6 short fiber composite. Nanosilica was also used as reinforcing filler in natural rubber/Nylon-6 short fiber hybrid composite. Mechanical, thermal, and dynamic mechanical properties of the composites were evaluated. The introduction of the nanosilica in hybrid composites improved the tensile strength, modulus, and tear strength through improved interaction with the matrix which is facilitated by the higher surface area. Abrasion loss and hardness were also better for the nanosilica composites. Resilience and compression set were adversely affected. The hybrid composites showed anisotropy in mechanical properties. Peak rate of thermal decomposition decreased and temperature of initiation of thermal degradation increased with silica content, indicating improved thermal stability of the hybrid composites. The storage modulus and loss modulus showed two-stage dependence on frequency at higher fiber loading.
机译：通过在受控条件下用稀盐酸酸水解硅酸钠来合成纳米级二氧化硅。通过SEM，BET吸附和XRD对合成的二氧化硅进行表征。根据XRD结果，二氧化硅的粒径为13nm，通过BET法测得表面积为295m2 / g。在天然橡胶/尼龙-6短纤维复合材料的HRH（六亚甲基四胺，间苯二酚和二氧化硅）键合系统中，该合成的纳米二氧化硅代替了传统的二氧化硅。纳米二氧化硅还用作天然橡胶/尼龙6短纤维混合复合材料的增强填料。评估了复合材料的机械，热和动态机械性能。在混合复合材料中引入纳米二氧化硅，可通过改善与基体的相互作用来改善拉伸强度，模量和撕裂强度，而较高的表面积可促进这种相互作用。纳米二氧化硅复合材料的磨损损失和硬度也更好。弹性和压缩永久变形受到不利影响。杂化复合材料的机械性能表现出各向异性。随二氧化硅含量的增加，热分解的峰值速率降低，热降解的起始温度升高，表明杂化复合材料的热稳定性得到改善。在较高的纤维负载下，储能模量和损耗模量显示出对频率的两阶段依赖性。

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