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Effects of the Amount of Fly Ash Modified by Stearic Acid Compound on Mechanical Properties, Flame Retardant Ability, and Structure of the Composites
International Journal of Chemical Engineering ( IF 2.7 ) Pub Date : 2020-03-01 , DOI: 10.1155/2020/2079189
Tuan Anh Nguyen 1
Affiliation  

Fly ash, a waste product from thermal power plants, is one of the good alternatives for use as a filler in polymers, especially in flame retardants. Fly ash is an environmentally friendly fire retardant additive for composites, used in place of conventional flame retardant additives such as halogenated organic compounds, thus promoting environmental safety. In this study, fly ash was modified with stearic acid to improve adhesion at the polymers interface and increase compatibility. Fly ash was studied at various volumes (5, 10, and 20 wt.% fly ash) used in this study to synthesize fly ash-epoxy composites. The results show that the tensile strength, flexural strength, compressive strength, and impact strength of these synthetic materials increase when fly ash is modified to the surface, compressive strength: 197.87 MPa, flexural strength: 75.20 MPa, impact resistance: 5.77 KJ/m2, and tensile strength: 47.89 MPa. Especially, the fire retardant properties are improved at a high level, with a modified 20% fly ash content: the burning rate of 16.78 mm/min, minimum oxygen index of 23.2%, and meet the fire protection standard according to UL 94HB with a burning rate of 8.09 mm/min. Scanning electron microscopy (SEM) and infrared spectroscopy were used to analyze the morphological structure of fly ash after being modified and chemically bonded with epoxy resin background.

中文翻译:

硬脂酸化合物改性粉煤灰用量对复合材料力学性能,阻燃性能及结构的影响

粉煤灰是火力发电厂的废品,是用作聚合物(尤其是阻燃剂)填料的良好替代品之一。粉煤灰是一种用于复合材料的环保阻燃添加剂,代替了传统的阻燃添加剂(如卤代有机化合物),从而提高了环境安全性。在这项研究中,粉煤灰用硬脂酸改性,以改善聚合物界面处的附着力并增加相容性。研究了用于本研究中的各种体积(5、10和20 wt%的粉煤灰)的粉煤灰,以合成粉煤灰-环氧树脂复合材料。结果表明,将粉煤灰改性到表面后,这些合成材料的抗张强度,抗弯强度,抗压强度和冲击强度均提高,抗压强度为197.87 MPa,抗弯强度为75。2,抗拉强度:47.89MPa。尤其是,阻燃性得到了高度改善,粉煤灰含量提高了20%:燃烧速度为16.78 mm / min,最小氧指数为23.2%,并符合UL 94HB的防火标准。燃烧速度为8.09毫米/分钟。利用扫描电子显微镜(SEM)和红外光谱技术对粉煤灰进行改性并与环氧树脂背景化学键合后的形态结构进行了分析。
更新日期:2020-03-01
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