A Study on the Preparation of Konjac Glucomannan-silk Fibroin Composite Aerogels and Its Adsorption of Water Pollutant Cr(Ⅲ)

• 作者: CHEN Han WU Chun-Hua HUANG Yi WU Hua-Hua PANG Jie
• 来源期刊: 结构化学
• 年，卷（期）: 2021,（1）
• 所属期刊栏目: materials structural cbemistry
• 页码范围: 23-30
• 页数: 8页
• 语种: 英文
• DOI: 10.14102/j.cnki.0254-5861.2011-2774

摘要

It is emergent to develop a green waste water adsorbent with high efficiency.Therefore,a type of low-cost,green and environmentally friendly konjac glucomannan(KGM)-silk fibroin(SF)composite aerogels were compounded via simple chemical grafting and vacuum freeze drying,and a study on its adsorption capacity was also conducted.The characterizations of FT-IR,SEM,XRD and DSC indicate that the modified aerogels show a porous network space structure and there is a strong hydrogen bond effect between the KGM and SF molecules,which improves the density,compressive strength and thermal stability of aerogel materials.The adsorption experiments show that KGM-SF aerogels can effectively adsorb the water pollutants Cr(Ⅲ)with a maximal adsorption capacity of 82 mg·g-1.In addition,the adsorption isotherm and dynamic model analysis are used to elaborate the adsorption mechanism of KGM-SF aerogels and explain that the composite aerogels can be single molecule chemisorption.KGM-SF aerogels have potential adsorption capacity.