生物酶法对新型油墨的脱除研究

论文编号:QH018 论文字数:10481,页数:29

摘要：本论文所研究的是生物酶在废纸碎浆时对油墨的脱除作用，此研究所用到的生物酶是工业生产的混合酶制剂。选用书本纸和经紫外油墨上光的纸张（比例为2:1）以及单一的紫外油墨上光的纸张，分别通过正交试验法进行酶处理，测试所抄得纸张的物理性能指标（主要是白度和残余油墨量），并通过数据的分析比较，得出以下结论：经生物酶处理的抄得的纸张与经化学法处理抄得的纸张相比，白度高，残余油墨量少。生物酶对书本纸和经紫外油墨上光的纸张（比例为2:1）处理的最佳条件组合为：酶处理时间为30 min，pH值为9，温度为60℃，酶用量为废纸绝干量的0.3%。对单一紫外油墨上光的纸张处理的最佳条件组合为：酶处理时间为30 min，pH值为8，温度50℃，酶用量为废纸绝干量的0.3%。反应时间和酶用量是影响实验结果的主要因素，温度和pH值是次要因素。

关键词：生物酶；紫外油墨；白度；残余油墨量

Cellulase Deinking of Waste Printed by New Ink

Abstract ：In this paper, the industrial production of hybrid enzymes was used to deinked the waste paper, which included old messages mixed with coated paper by UV (the ratio of 2:1) and a single UV ink coating of paper. Experiments were carried out with enzyme treatment according to the orthogonal methods. Then, the physical properties (mainly whiteness and residual ink volume) of finished paper were examined. The results showed that the samples treated by enzyme obtained higher brightness and less residual ink as the industrial dosage respectively. The optimum condition for deinking of OMG mixed with UV ink coating of paper (the ratio of 2:1) was: enzyme treatment time is 30 minutes, pH = 9, temperature was 60 ℃, and the dosage of enzyme was 0.3% based on the absolutely weight of fiber. For the single coated paper by UV ink, when the dosage of enzyme was 0.3%, pH value 9, treating time 30 minutes and temperature 50℃, the idealist result was obtained. Treating time and the dosage of enzyme were the main factors which influence the results, and reacting temperature and pH value were secondary factors.

Key words: cellulose; UV ink; brightness; residual ink amount

目 录

摘要……………………….……………………………………………………………………Ⅰ

ABSTRACT…………………………………………………………………..…………Ⅱ

1 绪论1

1.1 研究的背景和意义1

1.1.1 造纸工业现状1

1.1.2 目前的废纸脱墨情况1

1.1.3 生物酶法脱墨研究2

1.2 研究的内容和所需解决的问题4

2 混合废纸的脱墨研究6

2.1 实验原料、仪器及方法6

2.2 数据处理和结果讨论8

2.3 生物酶法最佳工艺条件脱墨12

2.4 生物酶法最佳工艺条件脱墨与化学法脱墨的结果比较12

2.5 小结13

3 紫外油墨上光纸的脱墨研究14

3.1 实验原料、仪器及方法14

3.2 数据处理和结果讨论15

3.3 生物酶法最佳工艺条件脱墨19

3.4 生物酶法最佳工艺条件脱墨与化学法脱墨的结果比较19

3.5 小结20

4 结论21

致 谢22

参考文献28