文献类型：期刊文献

英文题名：Shape memory aerogels from nanocellulose and polyethyleneimine as a novel adsorbent for removal of Cu(II) and Pb(II)

作者：Li, Jian[1] Zuo, Keman[1] Wu, Weibing[1] Xu, Zhaoyang[2] Yi, Yonggang[1] Jing, Yi[1] Dai, Hongqi[1] Fang, Guigan[3]

第一作者：Li, Jian

通信作者：Wu, WB[1]

机构：[1]Nanjing Forestry Univ, Jiangsu Coinnovat Ctr Efficient Proc & Utilizat F, 159 Long Pan Rd, Nanjing 210037, Jiangsu, Peoples R China;[2]Nanjing Forestry Univ, Coll Mat Sci & Engn, 159 Long Pan Rd, Nanjing 210037, Jiangsu, Peoples R China;[3]Chinese Acad Forestry, Inst Chem Ind Forestry Prod, Nanjing 210042, Jiangsu, Peoples R China

年份：2018

卷号：196

起止页码：376-384

外文期刊名：CARBOHYDRATE POLYMERS

收录：;EI(收录号：20182105236131);Scopus(收录号：2-s2.0-85047264871);WOS:【SCI-EXPANDED(收录号:WOS:000436571600042)】；

基金：The support of this work by the National Key Research and Development Program of China (2017YFD0601005), Natural Science Foundation of Jiangsu Province (BK20171450), National Natural Science Foundation of China (31370583, 31470599, 31770607) and Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD) are gratefully acknowledged.

语种：英文

外文关键词：Aerogel; Electrostatic combination; Shape memory; Heavy metal; Adsorbent

摘要：This study describes the preparation of an aerogel adsorbent based on nanofibrillated cellulose(NFC) and polyethyleneimine(PEI) via electrostatic combination without chemical crosslinking. Purely physical cross-linking between NFC and PEI was confirmed by attenuated total refraction-Fourier transform infrared spectroscopy (ATR-FTIR) and thermogravimetric analysis (TGA). The NFC/PEI hybrid aerogels exhibited good structural stability and shape recovery in water. Absorption experiment shows that the hybrid aerogels are excellent adsorbents for the removal of heavy metal ions owing to the highly porous structure and the existence of plenty of amine groups. Thermodynamic and kinetic study showed pseudo-second-order equation and Langmuir model (R-2 > 0.999) as the best fit. The maximum adsorption capacity of Cu(II) and Pb(II) according to Langmuir model was 175.44 mg/g and 357.44 mg/g, respectively. Besides, the Cu(II) or Pb(II) loaded NFC/PEI aerogel could be easily regenerated by EDTA and retain the adsorption capacity after repeatedly using. This environmentally friendly hybrid aerogels with high-performance are promising candidates for sewage disposal and metal pollution treatment.