Preparation process optimization and study on mechanical property of food waste/fly ash/acrylamide composite hydrogel

IF 1.9 4区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY
Yu Huang, Tingting Dong, Xing Zhang, Jingyi Zhao, Binkai Zhao, Mingyan Qin, Liwei Deng, Yalin Li
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Abstract

Resource utilization of food waste and fly ash has been a significant challenge for managing the environment, building a ‘waste-free city’ and achieving the ‘dual-carbon’ goal. In the present study, a high-strength food waste/fly ash/acrylamide composite hydrogel was developed by combining food waste and fly ash into functionalized particles using free radical cross-linking polymerization, with acrylamide used as the monomer, N, N′-methylene bisacrylamide as the cross-linking agent and sodium persulphate as the initiator. After one-factor experiments by changing the dosages of acrylamide, N, N′-methylene bisacrylamide, sodium persulphate, fly ash and polymerization temperature, the process conditions for the hydrogel to have the optimum mechanical property were obtained using response surface optimization. The experimental results showed that Young’s modulus of the produced hydrogels was as high as 2913 kPa at the dosages of acrylamide, N, N′-methylene bisacrylamide, sodium persulphate and fly ash of 4.349, 0.012, 0.540 and 1.181 g, respectively. Subsequently, the morphology and structure of the hydrogels were characterized using a Fourier transform infrared spectrometer, scanning electron microscope and X-ray diffractometer. The results showed that the interactions among polymer chains in the network structure of the hydrogel, the filling of fly ash and the hydrogen bonding combined to give the hydrogel excellent mechanical property. Meanwhile, Young’s modulus of composite hydrogel increased by 30.16% compared to that of the single-phase food waste hydrogel.

餐厨垃圾/粉煤灰/丙烯酰胺复合水凝胶制备工艺优化及力学性能研究
食物垃圾和粉煤灰的资源化利用一直是管理环境、建设“无废物城市”和实现“双碳”目标的重大挑战。本研究以丙烯酰胺为单体,N, N′-亚甲基双丙烯酰胺为交联剂,过硫酸钠为引发剂,将食物垃圾和粉煤灰结合成功能化颗粒,采用自由基交联聚合法制备了高强度食物垃圾/粉煤灰/丙烯酰胺复合水凝胶。通过改变丙烯酰胺、N, N′-亚甲基双丙烯酰胺、过硫酸钠、粉煤灰用量和聚合温度的单因素实验,通过响应面优化得到了水凝胶具有最佳力学性能的工艺条件。实验结果表明,在丙烯酰胺、N, N′-亚甲基双丙烯酰胺、过硫酸钠和粉煤灰分别为4.349、0.012、0.540和1.181 g的剂量下,制备的水凝胶的杨氏模量高达2913 kPa。随后,利用傅里叶变换红外光谱仪、扫描电镜和x射线衍射仪对水凝胶的形貌和结构进行了表征。结果表明,水凝胶网状结构中聚合物链之间的相互作用、粉煤灰的填充和氢键的结合使水凝胶具有优异的力学性能。同时,复合水凝胶的杨氏模量比单相食物垃圾水凝胶提高了30.16%。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Bulletin of Materials Science
Bulletin of Materials Science 工程技术-材料科学:综合
CiteScore
3.40
自引率
5.60%
发文量
209
审稿时长
11.5 months
期刊介绍: The Bulletin of Materials Science is a bi-monthly journal being published by the Indian Academy of Sciences in collaboration with the Materials Research Society of India and the Indian National Science Academy. The journal publishes original research articles, review articles and rapid communications in all areas of materials science. The journal also publishes from time to time important Conference Symposia/ Proceedings which are of interest to materials scientists. It has an International Advisory Editorial Board and an Editorial Committee. The Bulletin accords high importance to the quality of articles published and to keep at a minimum the processing time of papers submitted for publication.
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