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| Improving the Strength Properties of Mixed Office Waste Paper by Using Cellulase/Aspartic Acid System |
| Received:February 10, 2020 |
| DOI：10.11980/j.issn.0254-508X.2020.05.003 |
| Key Words:cellulase/aspartic acid system strength properties WRV crystallinity MOW |
| Fund Project:国家重点研发计划（No.2018YFE0110400）；国家自然科学基金（No.21978102,31670585）；制浆造纸工程国家重点实验室开放基金（No.21535）。 |
| Author Name | Affiliation | Postcode | | WANG Jinran | State Key Lab of Pulp and Paper Engineering, South China University of Technology, Guangzhou, Guangdong Province, 510640 | 510640 | | WAN Jinquan | State Key Lab of Pulp and Paper Engineering, South China University of Technology, Guangzhou, Guangdong Province, 510640
Guangdong Plant Fiber High-Valued Cleaning Utilization Engineering Technology Research Center,Guangzhou,Guangdong Province,510640 | 510640 | | ZHAO Joe Ruhe | Tri-Y Environmental Research Institute, Vancouver, B.C., Canada V5M 4P7 | V5M 4P7 | | YAN Zhicheng | Guangdong Plant Fiber High-Valued Cleaning Utilization Engineering Technology Research Center,Guangzhou,Guangdong Province,510640 | 510640 | | MA Yongwen | Guangdong Plant Fiber High-Valued Cleaning Utilization Engineering Technology Research Center,Guangzhou,Guangdong Province,510640 | 510640 |
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| Abstract:In view of the problems of fiber quality degradation and low paper strength during the process of Mixed Office Waste Paper (MOW) recycling, the strength properties of cellulase/aspartic acid system modified MOW were studied. The results showed that the strength properties of cellulase/aspartic acid system treated pulp were increased. The optimum processing conditions for cellulase/aspartic acid system treating MOW were: 14.74 U/g of cellulase, 2.19% aspartic acid (based on the oven dried weight of the pulp), temperature 49°C, and reaction time 56 min. After the treatment with optimum enzymatic system, the water retention value of the pulp(WRV) increased by 36 percentage points, the crystallinity index of the fiber decreased by 37.85% and the content of carboxyl groups increased 32.84% compared to the control pulp. The tensile index and burst index of the paper increased by 16.05% and 14.39% respectively compared to the control sample. |
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