Dual-functional natural-fiber reinforced composites by incorporating magnetite

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• 作者：Changlei Xia^b ; Kaili Wang^a ; Youming Dong^a ; Shifeng Zhang^a ; ^{Shifeng.Zhang@bjfu.edu.cn" class="auth_mail" title="E-mail the corresponding author} ; Sheldon Q. Shi^b ; ^{Sheldon.Shi@unt.edu" class="auth_mail" title="E-mail the corresponding author} ; Liping Cai^b ; Han Ren^c ; Hualiang Zhang^c ; Jianzhang Li^a ; ^{lijianzhang126@126.com" class="auth_mail" title="E-mail the corresponding author}
• 关键词：A. Fibres ; B. Magnetic properties ; E. Resin transfer moulding (RTM) ; Water resistance
• 刊名：Composites Part B: Engineering
• 出版年：2016
• 出版时间：15 May 2016
• 年：2016
• 卷：93
• 期：Complete
• 页码：221-228
• 全文大小：1334 K

文摘

Natural fiber reinforced composites with dual-functional properties, including electromagnetic shielding and paramagnetic functions, as well as improved water-resistant property, were fabricated using vacuum assisted resin transfer molding (VARTM) process. Magnetite particles were firstly mixed with kenaf fibers to form a mat, followed by resin intrusion and compression for the composite fabrication. The obtained kenaf fiber/magnetite/polyester composites were endowed with electromagnetic shielding and paramagnetic properties, without compromising the mechanical properties. When 35.2% magnetite was incorporated into the composites, the electromagnetic interference shielding effectiveness reached 79.2% with the range 8–12 GHz, and the saturation magnetization was 29.2 emu g⁻¹. The 24-h thickness swelling and water absorption of the composites after introducing magnetite were drastically reduced from 19.7% to 2.4% and 18.3% to 2.6%, counting as the decreases of 87.6% and 73.4%, respectively. It was indicated that the water resistance of the composite was improved significantly.