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| Modification of OCC Pulp by Laccase with the Phenols Contained in APMP Waste Liquor |
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| DOI：10.11981/j.issn.1000-6842.2011.02.16 |
| Key Words:laccase; APMP waste liquor; gas chromatography-mass spectrometry; OCC pulp； phenols |
| Fund Project:国家自然科学基金项目（项目编号30771694）和天津市科技计划发展项目（编号06TXTJJC14302）。 |
| Author Name | Affiliation | | 张鑫璐 | 天津科技大学天津市制浆造纸重点实验室，天津，300457 | | 裴继诚* | 天津科技大学天津市制浆造纸重点实验室，天津，300457 | | 张方东 | 天津科技大学天津市制浆造纸重点实验室，天津，300457 | | 于秀玲 | 天津科技大学天津市制浆造纸重点实验室，天津，300457 | | 胡惠仁 | 天津科技大学天津市制浆造纸重点实验室，天津，300457 |
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| Abstract: |
| This paper studied the working mechanism of natural mediators (phenols derived from small molecule lignin existing in APMP (alkaline peroxide mechanical pulp) waste liquor) in laccase-assisted modification of OCC (old corrugated container) pulp.Using gas chromatography-mass spectrometry (GC-MS) to analysis natural phenolic compounds, the changes of fiber surface morphology and physical properties of the sheet after laccase/natural mediator ( existing in APMP waste liquor) system treatment were studied. GC-MS confirmed that APMP waste liquor contained three major phenolic compounds, namely: 4-methoxyphenol, syringol and coniferyl alcohol. These phenolic compounds participated the laccase treatment, thus the lignin content on fiber surface increased therefore the paper strength, especially wet ring crush strength was improved. |
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