The influence of laccase/histidine system on the properties of OCC pulp fibers, and of handsheets made thereof
Source abstract
Abstract
Abstract For improving the physical properties of old corrugated container (OCC) fiber, the laccase/histidine system was used in this paper. Firstly, the paper studied the optimum conditions that the laccase/histidine system modified the OCC fiber, including enzyme dosage, histidine dosage, reaction time, reaction temperature, and pH. Experimental results showed that the optimum reaction conditions of laccase/histidine system for OCC pulp were: dose of enzyme 1 U·{\text{g}-1}, 4 h reaction time, pH 4.5, dose of histidine 1 %. Under the optimum reaction conditions, the tensile and burst indexes of the sheet made from laccase/histidine treatment were increased by 25.2 % and 34.0 %, compared with that of the control sample. The SEM results showed that compared with the control sample, the fibrillation of the fiber modified with laccase/histidine was more obvious. Finally, the content of acid-insoluble lignin of the fiber was determined. The content of acid-insoluble lignin of the control sample was 29.2 %, and the content of acid-insoluble lignin of the fiber treated by laccase/histidine system in optimum reaction conditions was 16.0 %, which decreased by 13.2 %. Laccase/histidine system could improve the physical properties of recycled fiber, alleviate fiber decay, which are of great significance to solve the resource shortage and environment pollution of the paper-making industry.
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Research context
OpenAlex topics: Enzyme-mediated dye degradation · Dyeing and Modifying Textile Fibers · Carbon and Quantum Dots Applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
College of Natural Resource and Environment , 12526 South China Agricultural University , Guangzhou , China
Funding
Pearl River S and T Nova Program of Guangzhou · National Natural Science Foundation of China
References (13)
Show source-provided references
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