文献类型：期刊文献

英文题名：Preparation of a low-cost and eco-friendly superabsorbent composite based on wheat bran and laterite for potential application in Chinese herbal medicine growth

作者：Gao, Jiande[1,2];Liu, Jin[1];Peng, Hui[1];Wang, Yaya[1];Cheng, Sha[1];Lei, Ziqiang[1]

第一作者：Gao, Jiande;高建德

通信作者：Lei, ZQ[1]

机构：[1]Northwest Normal Univ, Coll Chem & Chem Engn, Key Lab Ecoenvironm Related Polymer Mat, Minist Educ,Key Lab Polymer Mat Gansu Prov, Lanzhou 730070, Gansu, Peoples R China;[2]Gansu Univ Tradit Chinese Med, Coll Pharm, Lanzhou 730000, Gansu, Peoples R China

第一机构：Northwest Normal Univ, Coll Chem & Chem Engn, Key Lab Ecoenvironm Related Polymer Mat, Minist Educ,Key Lab Polymer Mat Gansu Prov, Lanzhou 730070, Gansu, Peoples R China

通信机构：[1]corresponding author), Northwest Normal Univ, Coll Chem & Chem Engn, Key Lab Ecoenvironm Related Polymer Mat, Minist Educ,Key Lab Polymer Mat Gansu Prov, Lanzhou 730070, Gansu, Peoples R China.

年份：2018

卷号：5

期号：5

外文期刊名：ROYAL SOCIETY OPEN SCIENCE

收录：;Scopus(收录号：2-s2.0-85047906823);WOS:【SCI-EXPANDED(收录号:WOS:000433498000098)】；

基金：This work was supported by the Program for Changjiang Scholars and Innovative Research Teams in the University (IRT15R56), the China Postdoctoral Science Foundation (2013M540778) and Gansu Province Science and Technology Research (GYC13-05).

语种：英文

外文关键词：laterite; superabsorbent composite; urea fertilizer carrier; Chinese herbal medicine growth

摘要：A low-cost and eco-friendly superabsorbent composite is prepared through the free-radical graft co-polymerization of wheat bran (WB), acrylic acid (AA) and laterite (LA) in an aqueous solution. Elemental map, scanning electron microscopy and Fourier transform infrared spectra revealed that the LA evenly distributed in the superabsorbent composite and wheat bran-g-poly(acrylic acid)/laterite (WBg-PAA/LA) formed successfully. Thermogravimetric analysis confirmed that the WB-g-PAA/LA had high thermal stability. Furthermore, the properties of the WB-g-PAA/LA, such as swelling in saline solutions and degradation, are also assessed. The final WB-g-PAA/LA (5 wt%) superabsorbent composite attained an optimum water absorbency of 1425 g g(-1) in distilled water and 72 g g(-1) in 0.9 wt% NaCl solution. The water absorbency of WB-g-PAA/LA (10 wt%) is even greater than that of the WB-g-PAA. Moreover, the water-retention capacity of WB-g-PAA/LA (5 wt%) is high, and the water-retention process followed a zero-order reaction. The reaction rate constant is 8.2428 x 10(5) exp(-E-a/RT) and the apparent activation energy ( Ea) is 35.11 kJ mol(-1). Furthermore, WB-g-PAA/LA (5 wt%) may regulate the release of urea, indicating that the superabsorbent composite could provide a promising application as a urea fertilizer carrier. Additionally, it increased the germination and growth rates of Glycyrrhiza uralensis Fisch, suggesting it could influence the growth of Chinese herbal medicine.