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首页> 外文期刊>Journal of Polymers and the Environment >Two-Step Procedure of Fly Ash Modification as an Alternative Method for Creation of Functional Composite
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Two-Step Procedure of Fly Ash Modification as an Alternative Method for Creation of Functional Composite

机译：粉煤灰改性的两步法作为创建功能性复合材料的替代方法

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摘要

An appropriate filler is a key component required to achieve an useful composite with expected properties. Not only sophisticated types of filler, like graphene are popular, but also more common ones, like silica flour or fly ash because of their low costs. Besides production costs, adequate size and possibility of functionalization of particles surface to create stable bonds with a matrix are essential in filler selection. To create an useful filler for epoxy resin based composites with use of a waste material, namely fly ash, two-step procedure was proposed. In the first part, raw material was sieved and five different ranges of the filler size were obtained. After mechanical tests with fracture toughness, tensile strength and Young Modulus, as well thermal conductivity, the best size of the fly ash was chosen for further modification. During the second step, filler was modified with coupling agent [3-(2-aminoethylamino)propyl]trimethoxysilane in order to enhance the coupling between particular components of composite. Presence of the silane layer was confirmed with infrared spectroscopy and scanning electron microscopy measurements, whilst prepared epoxy composite filled with silanized fly ash was examined similarly as previous composites. Obtained results have proved the significant influence of size of a filler and bonding to the matrix on mechanical and thermal properties of fly ash-epoxy resin composite. Proposed simple method of fly ash modification is an environmentally friendly way for utilization of the fly ash. Moreover, it creates an alternative material applicable in electrical devices as functional composite.
机译：合适的填料是获得具有预期性能的有用复合材料所需的关键组分。不仅复杂的填料类型（如石墨烯）很受欢迎，而且由于成本低廉，更常见的填料（如硅粉或粉煤灰）也很受欢迎。除了生产成本外，填料选择还必须考虑到适当的尺寸和颗粒表面官能化以与基质形成稳定键的可能性。为了利用废料即粉煤灰产生用于环氧树脂基复合材料的有用填料，提出了两步法。在第一部分中，对原材料进行筛分，获得五个不同范围的填料尺寸。在进行了断裂韧性，拉伸强度和杨氏模量以及热导率的机械测试后，选择了最佳粉煤灰尺寸进行进一步改性。在第二步中，用偶联剂[3-（2-氨基乙基氨基）丙基]三甲氧基硅烷改性填料，以增强复合材料特定组分之间的偶联。硅烷层的存在通过红外光谱法和扫描电子显微镜测量法确认，同时制备的填充有硅烷化粉煤灰的环氧复合材料与以前的复合材料类似地进行了检查。所得结果证明了填料的尺寸以及与基质的结合对粉煤灰-环氧树脂复合材料的机械和热学性能有重大影响。提出的简单的粉煤灰改性方法是一种利用粉煤灰的环保方法。此外，它创造了一种替代材料，可作为功能性复合材料应用于电气设备。

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