Mechanical properties and morphology of the deproteinized natural rubber (NR) films reinforced with modified silica (SiO2) nanoparticles were studied in this research. In the step of deproteinization, a chemical method followed by centrifugation was used to reduce the amount of protein from 0.42 wt% to 0.11 wt%. Structure-modified nanosilica with Silane A174 was used as an additive to reinforce the deproteinized films. The addition of 1 phr of the modified nanosilica exhibited better tensile strength, tensile force at break, modulus at 500% and elongation at break which were improved significantly compared to those of bare films. The modified nanosilica dispersed uniformly in the rubber matrix with the nanoparticle size less than 100 nm observed from the scanning electron microscope. The prepared rubber films containing the modified SiO2 nanoparticles have great potential to produce the NR gloves having very tiny amounts of protein for medical use which still provide the good mechanical strength compared to the standard ones.

中文翻译：

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硅烷改性二氧化硅纳米粒子增强的脱蛋白天然橡胶薄膜

本研究研究了用改性二氧化硅 (SiO2) 纳米粒子增强的脱蛋白天然橡胶 (NR) 薄膜的机械性能和形态。在脱蛋白步骤中，使用化学方法，然后离心，将蛋白质的量从 0.42 wt% 减少到 0.11 wt%。使用硅烷 A174 结构改性的纳米二氧化硅作为添加剂来增强脱蛋白膜。添加 1 phr 的改性纳米二氧化硅表现出更好的拉伸强度、断裂拉伸力、500% 模量和断裂伸长率，与裸膜相比有显着提高。经扫描电镜观察，改性纳米二氧化硅均匀分散在橡胶基体中，纳米粒径小于100 nm。