Muhammad Altaf, Muhammad Naeem Ahmed, Anila Iqbal, Arshad Ali Khan
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引用次数: 0
摘要
在这项研究中，使用了成本效益高、应用广泛且无毒的填料来提高环氧纳米复合材料的阻燃性。该研究采用了一种新颖且对环境无害的阳离子交换方法，用带正电荷的 L-丝氨酸对膨润土纳米粘土进行改性，用于合成纳米复合材料。使用 X 射线光电子能谱（XPS）和傅立叶变换红外光谱（FT-IR）确认了粘土的改性。X 射线衍射（XRD）技术证明，由于阳离子交换，d-间距从 12.82 Å 增加到 14.42 Å。场发射扫描电子显微镜（FE-SEM）和能量色散 X 射线光谱（EDS）用于研究纳米复合材料的微观结构。通过热重分析（TGA）确定了环氧纳米复合材料的失重率降低，炭产量增加了 28.0% 至 34.0%。美国保险商实验室（UL-94）对纳米复合材料的 V-0 评级表明其阻燃性能有所提高。纳米填料大大降低了三氢氧化铝（ATH）的含量，并通过其协同效应提高了阻燃性。
Synthesis and characterization of novel organoclay-epoxy based flame retardant nanocomposites
In this study, cost-effective, widely spread, and nontoxic fillers were used to improve the flame retardancy of epoxy nanocomposites. A novel and environmentally benign cation exchange approach was used for the modification of bentonite nanoclay with positively charged L-serine, used to synthesize nanocomposites. Modification of clay was confirmed by using X-ray photoelectron spectroscopy (XPS) and Fourier transform infrared (FT-IR) spectroscopy. X-ray diffraction (XRD) technique proved increase of d-spacing from 12.82 Å to 14.42 Å as a result of cation exchange. Field emission scanning electron microscopy (FE-SEM) and energy-dispersive X-ray spectroscopy (EDS) were used to investigate microstructure of the nanocomposites. Reduction in weight loss, with 28.0 % to 34.0 % increase in char yield of epoxy nanocomposites was determined by the thermogravimetric analysis (TGA). Underwriters laboratories (UL-94) V-0 ratings of nanocomposites indicated improved flame retardancy. Nanofillers significantly reduced the loading of aluminum tri-hydroxide (ATH) and improved the flame retardancy through its synergistic effect.
期刊介绍：
The Journal of Reinforced Plastics and Composites is a fully peer-reviewed international journal that publishes original research and review articles on a broad range of today''s reinforced plastics and composites including areas in:
Constituent materials: matrix materials, reinforcements and coatings.
Properties and performance: The results of testing, predictive models, and in-service evaluation of a wide range of materials are published, providing the reader with extensive properties data for reference.
Analysis and design: Frequency reports on these subjects inform the reader of analytical techniques, design processes and the many design options available in materials composition.
Processing and fabrication: There is increased interest among materials engineers in cost-effective processing.
Applications: Reports on new materials R&D are often related to the service requirements of specific application areas, such as automotive, marine, construction and aviation.
Reports on special topics are regularly included such as recycling, environmental effects, novel materials, computer-aided design, predictive modelling, and "smart" composite materials.
"The articles in the Journal of Reinforced Plastics and Products are must reading for engineers in industry and for researchers working on leading edge problems" Professor Emeritus Stephen W Tsai National Sun Yat-sen University, Taiwan
This journal is a member of the Committee on Publication Ethics (COPE).
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