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漆酶改善分离木素和OCC纸浆特性的研究
引用本文:裴继诚,石淑兰,王飞,魏华丽,刘娜. 漆酶改善分离木素和OCC纸浆特性的研究[J]. 纤维素科学与技术, 2006, 14(2): 1-7
作者姓名:裴继诚  石淑兰  王飞  魏华丽  刘娜
作者单位:1. 天津科技大学,天津市制浆造纸重点实验室,天津,300222;华南理工大学制浆造纸工程国家重点实验室,广东,广州,510641
2. 天津科技大学,天津市制浆造纸重点实验室,天津,300222;中国科学院广州化学研究所纤维素化学重点实验室,广东,广州,510650
3. 天津科技大学,天津市制浆造纸重点实验室,天津,300222
基金项目:国家自然科学基金(30471359),天津市高等学校科技发展基金(20031303),天津科技大学重点基金(20040108),华南理工大学制浆造纸工程国家重点实验室(200407)资助课题
摘    要:应用漆酶处理纤维素酶分离酶解木素和OCC(Old corrugated containers)纸浆,结果表明:木素在漆酶处理过程中会发生降解,经漆酶处理后再经加热处理会使木素发生聚合,木素降解主要发生在高分子量木素部分,而聚合作用主要发生在低分子量木素之间;木素经漆酶处理后,酚羟基的含量略有增加,这是由于在漆酶处理木素的过程中,木素不但发生酚氧自由基的离域现象,而且还有高分子量的木素发生降解产生了新的酚羟基;经不同用量的漆酶处理的OCC纸浆手抄片的湿环压指数和湿抗指数与对照样相比均有明显提高,特别是漆酶用量为24 U/g时,湿环压指数达到4.1 N.m/g,提高了41%。经不同用量的漆酶处理的OCC纸浆干环压强度和干抗张强度与对照样相比略有提高,但提高的幅度不大。

关 键 词:漆酶  纤维素酶分离木素  OCC  环压强度  抗张强度
文章编号:1004-8405(2006)02-0001-07
修稿时间:2005-07-27

Modification of Cellulolytic Enzyme Lignin and OCC with Laccase
PEI Ji-cheng,SHI Shu-lan,WANG Fei,WEI Hua-li,LIU Na. Modification of Cellulolytic Enzyme Lignin and OCC with Laccase[J]. Journal of Cellulose Science and Technology, 2006, 14(2): 1-7
Authors:PEI Ji-cheng  SHI Shu-lan  WANG Fei  WEI Hua-li  LIU Na
Abstract:In this paper the oxidation of cellulolytic enzyme lignin(CEL) and old corrugated containers(OCC),catalyzed by laccase,was studied.The depolymerization reactions of CEL can have taken place during the laccase treatment.Whereas polymerization in the laccase-treated CEL was observed after a heat-treatment.The CEL depolymerized in the laccase-treatment are high-molecular-weight substrate for laccase.The CEL polymerized in a heat-treatment are low-molecular-weight substrate for laccase.As delocalisation of formed radicals and depolymerization in a high-molecular-weight substrate,the amount of phenolic hydroxyl groups in laccase-treatment CEL was found to increase slightly.Wet ring crush compression strength(RCT) and wet tensile strength of OCC treated with laccase showed significant increases compared to control hand-sheet.For instance,RCT of OCC treated with laccase dosage 24 U/g(pulp) was 4.1 N.m/g,increase of up to 41%.The dry RCT and tensile strength did not show significant increase.
Keywords:laccase  cellulolytic enzyme lignin  old corrugated containers(OCC)  crush compression strength  tensile strength
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