纤维素酶/天冬氨酸体系改善办公废纸纤维回用性能的研究
The Study of Improving the Fiber Performance of Mixed Office Waste Paper by Using Cellulase/Aspartic Acid System
收稿日期：2020-01-06  修订日期：2020-02-03
DOI：
关键词:  纤维素酶/天冬氨酸体系  强度性能  保水值  结晶度
Key Words:Cellulase/Aspartic acid system  Strength properties  WRV  Crystallinity
基金项目:国家重点研发计划(No.2018YFE0110400)；国家自然科学基金(No.21978102,31670585)；制浆造纸国家重点实验室开放基金(No.21535)
作者单位邮编
王金然 华南理工大学制浆造纸工程国家重点实验室 510640
万金泉* 华南理工大学制浆造纸工程国家重点实验室 510640
赵汝和 Tri-Y Environmental Research Institute, Lillooet St,Vancouver,BC,Canada VM P 
闫志成 广东省植物纤维高值化清洁利用工程技术研究中心 
马邕文 广东省植物纤维高值化清洁利用工程技术研究中心 
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摘要:针对办公废纸回用过程中出现的纤维品质衰变、成纸强度低等问题，研究了纤维素酶/天冬氨酸改性下成纸的强度性能。结果表明：采用纤维素酶/天冬氨酸体系处理办公废纸可以明显提高其成纸强度性能，纤维素酶/天冬氨酶体系处理办公废纸最优工艺条件为：纤维素酶用量14.74 U/g、天冬氨酸用量2.19%、温度49.0 °C、时间55.96 min。与未处理的空白样相比，最优酶促体系处理下的办公废纸纤维保水值升高36%，抗张指数与耐破指数分别提高了16.05%和14.39%。改性后纤维结晶度指数比空白样下降37.58%，羧基含量提高32.84%。
Abstract:In view of the problems of fiber quality decay and low paper strength during the process of Mixed Office Waste Paper (MOW) recycling, the strength properties of cellulase/aspartic acid system modified MOW was studied. The results showed that the strength properties of cellulase/aspartic acid system treated pulp was increased. The optimum processing conditions for cellulase/aspartic acid system modified MOW were: 14.74 U/g of cellulase, 2.19% aspartic acid (based on the oven dried weight of the pulp), temperature 49.0 °C, and reaction time 55.96 min. At optimum enzymatic system, the water retention value (WRV), tensile index, and burst index were increased by 36%, 16.05%, and 14.39% compared to control pulp. After modification, the crystallinity index of the fiber was decreased by 37.58% compared to the control sample. The content of carboxyl groups increased 32.84% compared to the control pulp after modified by cellulase/aspartic acid system.
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