Free radical induced grafting of acrylonitrile on pre-treated rice straw for enhancing its durability and flame retardancy

详细信息    查看全文

• 作者：Aparna Mukherjee^a ; Seema Halder^a ; Deepshikha Datta^a ; ^b ; Kumar Anupam^c ; Biren Hazra^d ; Mrinal Kanti Mandal^a ; Gopinath Halder^a ; ^{gopinath_haldar@yahoo.co.in}
• 关键词：Rice straw ; Delignification ; Polymer grafting ; Free radical ; Flame-retardant ; Durability
• 刊名：Journal of Advanced Research
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：8
• 期：1
• 页码：73-83
• 全文大小：1519 K
• 卷排序：8

文摘

The present investigation highlights the feasibility of a polymer grafting process to enhance the durability and flame retardancy of rice straw towards application as a low cost roofing material. The success of this grafting methodology was perceived to depend upon a bi-step pre-treatment process encompassing delignification and inorganic salts dispersion. Subsequently free radical polymer grafting of acrylonitrile onto rice straw was implemented by immersion mechanism initiated by oxalic acid-potassium permanganate initiator. The percentage of grafting, limiting oxygen index (LOI), biodegradability of the grafted rice straw and grafting yield percentage was estimated to be 57%, 27%, 0.02% and 136.67%, respectively. The weight loss of polymer grafted rice straw implied its less biodegradability over raw straw. Thus, the process of grafting contrived in the present analysis can be a promising and reliable technique for the efficient utilization of rice straw as an inexpensive roofing element through the augmentation of its durability and flame retardancy.