Synthesis and characterization of temperature/pH dual sensitive hemicellulose-based hydrogels from eucalyptus APMP waste liquor

Ting Chen; Haitang Liu; Cuihua Dong; Yongzhen An; Jing Liu; Jie Li; Xuexiu Li; Chuanling Si; Meiyun Zhang

doi:10.1016/j.carbpol.2020.116717

Synthesis and characterization of temperature/pH dual sensitive hemicellulose-based hydrogels from eucalyptus APMP waste liquor

Carbohydr Polym. 2020 Nov 1:247:116717. doi: 10.1016/j.carbpol.2020.116717. Epub 2020 Jul 3.

Authors

Ting Chen¹, Haitang Liu², Cuihua Dong³, Yongzhen An⁴, Jing Liu⁴, Jie Li⁴, Xuexiu Li⁴, Chuanling Si⁵, Meiyun Zhang⁶

Affiliations

¹ China Light Industry Key Laboratory of Papermaking and Biorefinery, Tianjin Key Laboratory of Pulp & Paper, Tianjin University of Science and Technology, Tianjin 300457, China; College of Bioresources Chemical and Materials Engineering, Shaanxi University of Science and Technology, Xi'an, 710021, China.
² China Light Industry Key Laboratory of Papermaking and Biorefinery, Tianjin Key Laboratory of Pulp & Paper, Tianjin University of Science and Technology, Tianjin 300457, China; Key Laboratory of Pulp and Paper Science and Technology of Chinese Ministry of Education and Shandong Province, Qilu University of Technology, Jinan 250353, China; Jiangsu Key Laboratory for Biomass Energy and Material, Jiangsu Province, Nanjing, 210042, China; Tianjin Key Laboratory of Marine Resources and Chemistry, (Tianjin University of Science & Technology), Tianjin, 300457, China. Electronic address: liuhaitang@tust.edu.cn.
³ Key Laboratory of Pulp and Paper Science and Technology of Chinese Ministry of Education and Shandong Province, Qilu University of Technology, Jinan 250353, China.
⁴ China Light Industry Key Laboratory of Papermaking and Biorefinery, Tianjin Key Laboratory of Pulp & Paper, Tianjin University of Science and Technology, Tianjin 300457, China.
⁵ China Light Industry Key Laboratory of Papermaking and Biorefinery, Tianjin Key Laboratory of Pulp & Paper, Tianjin University of Science and Technology, Tianjin 300457, China. Electronic address: sichli@tust.edu.cn.
⁶ College of Bioresources Chemical and Materials Engineering, Shaanxi University of Science and Technology, Xi'an, 710021, China. Electronic address: myzhang@sust.edu.cn.

PMID: 32829844
DOI: 10.1016/j.carbpol.2020.116717

Abstract

In this investigation, a variety of innovative temperature/pH-sensitive hydrogels consisting of hemicellulose (extracted from APMP waste liquor) and acrylic acid/acrylamide monomers were synthesized via free radical polymerization for water retention agents and controlled release. The results showed that the hydrogel polymer was chemically cross-linked and entangled to form a three-dimensional network structure, and the monomer successfully grafted on the hemicellulose chain. The content of crosslinkers and monomers had obvious effects on the swelling ratio of hydrogel. The sensitivity of the hydrogel was determined according to the change of the swelling ratio of the hydrogel under different temperature and pH conditions, combined with the chemical structure analysis of the hydrogel, and explain its sensitivity mechanism. Finally, after 6 days at 25 °C and pH 6, the swelled hydrogel still retained 79.46 % of the moisture, which proved that it has high water retention ability.

Keywords: Acrylamide; Acrylic acid; Biorefinery; Hemicellulose; Swelling ratio.

MeSH terms

Acrylic Resins / chemistry*
Eucalyptus / chemistry*
Hydrogels / chemical synthesis*
Hydrogels / isolation & purification
Hydrogen-Ion Concentration
Peroxides / chemistry*
Polymers / chemistry*
Polysaccharides / chemistry*
Temperature
Waste Disposal, Fluid*

Substances

Acrylic Resins
Hydrogels
Peroxides
Polymers
Polysaccharides
hemicellulose