摘要
油类污染对生态环境会造成严重且长期的影响,目前已成为世界性的挑战之一.在常用的处理方式中,原位燃烧易造成二次污染,生物修复手段往往是耗时的,而传统的吸油材料在应对高黏度的油污时具有较大的局限性.为此,本研究通过简单的60℃水热反应配合冷冻干燥,设计并制备了一种由氧化石墨烯和聚氨酯丙烯酸酯组成的复合气凝胶.利用SEM和拉曼光谱等技术表征了氧化石墨烯(GO)-聚氨酯丙烯酸酯复合气凝胶的微观结构和化学组成,结果表明氧化石墨烯成功嵌入到聚氨酯丙烯酸酯气凝胶中,且该复合气凝胶具有疏松多孔的结构.利用氧化石墨烯的光热效应,该复合气凝胶在光照下将太阳能转化为热能,降低油污的黏度,提升流动性,从而有效提高复合气凝胶对油污的吸附速率.在光照5 min条件下,该复合气凝胶可吸收约24倍自重的高黏度硅油.这项工作针对高黏度油污吸附的难点,设计了一种合成简便,具有一定应用价值的新型纳米复合气凝胶.
Oil pollution can cause serious and long-term ecological damage,which has become a worldwide challenge.Traditional treatment methods,such as in-situ burning and bioremediation are limited due to the generation of secondary pollution and the time-consuming procedure.Traditional oil absorbent materials often fail in absorbing high-viscosity oil.To this end,we designed and prepared an nanocomposite aerogel comprised of graphene oxide(GO)and polyurethane acrylate through a simple hydrothermal reaction at 60℃ followed by freeze-drying.The microstructure and chemical composition of the graphene oxide(GO)-polyurethane acrylate nanocomposite aerogel were analyzed using SEM and Raman spectroscopy.The results showed that the graphene oxide(GO)-polyurethane acrylate nanocomposite aerogel possess highly porous structure,and graphene oxide was successfully embedded in the polyurethane acrylate aerogel.Due to the photothermal effect of graphene oxide,the nanocomposite aerogel converts solar energy into heat,leading to the increase of oil fluidity.As a result,the adsorption rate of the nanocomposite aerogel to oil is significantly improved.Meanwhile,the nanocomposite aerogel absorbs approximately 24 times of its own weight of high viscosity silicone oil under 5 min of light irradiation.This work demonstrated a facile method to fabricate a GO-based nanocomposite aerogel to overcome the challenge of high-viscosity oil adsorption,which could pave the way for developing new adsorbents with real-life application value.
作者
李雯雯
覃彩蝶
林思劼
LI Wenwen;QIN Caidie;LIN Sijie(College of Environmental Science and Engineering,Biomedical Multidisciplinary Innovation Research Institute,Shanghai East Hospital,Tongji University,Shanghai,200092,China;Key Laboratory of Yangtze River Water Environment,Shanghai Institute of Pollution Control and Ecological Security,Tongji University,Shanghai,200092,China)
出处
《环境化学》
CAS
CSCD
北大核心
2022年第6期1869-1879,共11页
Environmental Chemistry
基金
污染控制与资源化研究国家重点实验室自主课题资助(PCRRK20015)
国家自然科学基金(21777116,22176150)资助.
