A TEMPO-oxidized cellulose nanofibers/MOFs hydrogel with temperature and pH responsiveness for fertilizers slow-release

Xiangyu Lin; Lizhen Guo; Hiba Shaghaleh; Yousef Alhaj Hamoud; Xu Xu; He Liu

doi:10.1016/j.ijbiomac.2021.09.075

A TEMPO-oxidized cellulose nanofibers/MOFs hydrogel with temperature and pH responsiveness for fertilizers slow-release

Int J Biol Macromol. 2021 Nov 30:191:483-491. doi: 10.1016/j.ijbiomac.2021.09.075. Epub 2021 Sep 23.

Authors

Xiangyu Lin¹, Lizhen Guo¹, Hiba Shaghaleh², Yousef Alhaj Hamoud², Xu Xu³, He Liu⁴

Affiliations

¹ College of Chemical Engineering, Advanced Analysis and Testing Center, International Innovation Center for Forest Chemicals and Materials, Nanjing Forestry University, Jiangsu Provincial Key Lab for the Chemistry and Utilization of Agro-Forest Biomass, Jiangsu Key Lab of Biomass-Based Green Fuels and Chemicals, Nanjing 210037, Jiangsu Province, China.
² College of Agricultural Science and Engineering, Hohai University, Nanjing 210098, China.
³ College of Chemical Engineering, Advanced Analysis and Testing Center, International Innovation Center for Forest Chemicals and Materials, Nanjing Forestry University, Jiangsu Provincial Key Lab for the Chemistry and Utilization of Agro-Forest Biomass, Jiangsu Key Lab of Biomass-Based Green Fuels and Chemicals, Nanjing 210037, Jiangsu Province, China. Electronic address: xuxu200121@hotmail.com.
⁴ Institute of Chemical Industry of Forestry Products, Chinese Academy of Forestry, Key Laboratory of Biomass Energy and Material, Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Key Lab. of Chemical Engineering of Forest Products, National Forestry and Grassland Administration, National Engineering Laboratory for Biomass Chemical Utilization, Nanjing 210042, Jiangsu Province, China. Electronic address: liuhe.caf@gmail.com.

PMID: 34562535
DOI: 10.1016/j.ijbiomac.2021.09.075

Abstract

In this work, a kind of MOF MIL-100(Fe)@CNFs hydrogel (MC) based on TEMPO-oxidized cellulose nanofibers (CNFs) for fertilizers slow-release was prepared by free-radical polymerization, where N-vinyl caprolactam (NVCL) and CNFs were involved to exhibit temperature and pH response, respectively. Particularly, porous MIL-100(Fe), a kind of metal organic frameworks (MOFs), was introduced to optimize the load and slow-release capabilities. The Fourier transform infrared spectroscopy, X-ray diffraction, scanning electron microscopy, and thermogravimetric analysis were used to characterize. The swelling behaviors and water-retention capabilities of hydrogels were evaluated. Using urea as the model fertilizer, the slow-release mechanism was revealed. Wheat was used as the model crop to evaluate the practical growth status. Compared with MC-0% hydrogels, the MC-10% hydrogels exhibited a better swelling capacity (37 g/g), water-retention (22.78%) and slow-release performance (40.84%). It also exhibited sensitivities to temperature and pH for regulating urea release. Besides, the number of tillers and leaves of wheat fertilized with MC hydrogels significantly increased, as did the photosynthetic rate. In conclusion, the MC-0% hydrogels had a positive influence on crops growth, and promoted the possible utilization of hydrogels in slow-release fertilizers.

Keywords: Cellulose; Hydrogel; Slow-release.

MeSH terms

Cellulose, Oxidized / chemistry*
Drug Liberation
Fertilizers*
Hydrogels / chemistry*
Hydrogen-Ion Concentration
Metal-Organic Frameworks / chemistry*
Nanofibers / chemistry*
Piperidines / chemistry
Smart Materials / chemistry*
Temperature

Substances

2,2,6,6-tetramethyl-1-piperidine
Cellulose, Oxidized
Fertilizers
Hydrogels
Metal-Organic Frameworks
Piperidines
Smart Materials