Modification of cellulase with polyalkylene oxide allyl ester-maleic acid anhydride copolymer and its application to the pulp and paper industry

Kwinam Park, Jinwon Park, Ju Han Lee

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Abstract

Functional copolymer-modified cellulase was applied to newspaper reprocessing. The new copolymers, composed of polyalkylene oxide (PAO) and maleic acid anhydride (MA), were synthesized to modify the cellulase. MA was attached to PAO allyl ester, formed by the reaction between PAO allyl alcohol and lauric acid. The modification is produced by the ability of MA to react with the amino acid group of the cellulase for modification. At the maximum degree of modification of 52%, modified cellulase showed more than 65% activity over the unmodified native cellulase. When modified cellulase was applied to the waste paper reprocessing, it was found that the cellulase enhanced the detachment of ink particles from paper. PAO was found to also cause the removal of the detached ink particles by floatation. This process creates a more moderate environment than conventional methods, improves the physical properties of the paper such as freeness and whiteness in comparison to conventional NaOH methods, while maintaining the same ink particle removal ability.

Original languageEnglish
Pages (from-to)894-899
Number of pages6
JournalJournal of Applied Polymer Science
Volume84
Issue number5
DOIs
Publication statusPublished - 2002 Feb 15

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All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Surfaces, Coatings and Films
  • Polymers and Plastics
  • Materials Chemistry

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