会议论文

Fabrication of Porous Cellulosic Aerogels with Adsorption Properties for Pb2+

中文

2015

1-10

第六届全国生物质材料科学与技术学术研讨会

第六届全国生物质材料科学与技术学术研讨会论文集

2015-10-18

南京

中国林学会生物质材料科学分会

本校为第一机构

纳米纤维素具有高孔隙率、高比表面积、丰富的活性羟基,其交联的多孔网络结构使其具有超吸附性能.本文以纸浆纤维和纤维素纳米晶体(CNCs)为原料,接枝共聚丙烯酸(AA),制备交联多孔的纸浆纤维素气凝胶吸附剂(WP-AA)和纤维素纳米晶体气凝胶吸附剂(CNCs-AA).并对比研究这两种吸附剂的性能,结果表明,制备的WP-AA和CNCs-AA吸附剂都具有交联多孔的网络结构,Pb2+被成功吸附在CNCs-AA吸附剂的表面.溶液pH对Pb2+离子的吸附性能有很大的影响,以CNCs为原料制备的CNCs-AA吸附剂对Pb2+的吸附性能明显优于未经纳米化处理的WP-AA气凝胶,且其对Pb2+的吸附更符合准二级动力学模型以及Langmuir等温吸附模型.

　　Nanocellulose possesses the properties of high porosity,high specific area,abundant active hydroxyl groups,and the cross-linking porous network structure make it has the properties of adsorption performance.In this paper,wood pulp fiber and cellulose nanocrystals are select to graft acrylic acid to prepare the porous wood pulp aerogel adsorbent(WP-AA)and cellulose nanocrystals aerogel adsorbent(CNCs-AA).The properties of two kinds of aerogel were comparative studied,the results showed that the porous network structure of WP-AA aerogels and ...