Hydrophobicity and Strength Properties of Paper Coated with Chitosan Enzymatically Functionalized with 4-Hexyloxyphenol
Due to growing safety and environmental concerns,the functionalization of natural polymers using enzymes were constantly investigated as an attractive alternative to toxic and non-specific chemical approaches.In this paper,the chitosan(CTS)was modified by laccase combined with 4-hexyloxyphenol(HP).The paper sheet of unbleached kraft pulp(KP)was coated by the resulted chitosan derivative(Lac/HP-CTS).The hydrophobicity and strength properties of the coated papers were studied.The results showed that,compared to the papersheet coated with pure chitosan,the sizing degree of the papersheet coated with the Lac/HP-CTS increased from 2.7 s to 331.7 s.The Cobb value decreased from 110.1 g/m2 to 48.7 g/m2.The capillary absorption height reduced from 2.55 cm to 0.25 cm.As for the strength properties,compared to the pure chitosan,the dry tensile index of the paper coated with the Lac/HP-CTS decreased from 25.9 N·m/g to 14.1 N·m/g.The burst index of papersheet coated with modified-chitosan decreased from 3.2 KPa·m2/g to 2.1 KPa·m2/g.The tear index of papersheet reduced from 17.3 mN·m2/g to 14.2 mN·m2/g.However,the wet tensile index of papersheet coated with the Lac/HP-CTS increased from 2.7 N·m/g to 3.6 N·m/g.As the modified-chitosan concentration increased,the sizing degree of paper sheets increased significantly and the Cobb value decreased obviously.The modified-chitosan concentration had a significant positive effect on the dry tensile index,dry tear index and dry burst index.The wet tensile index of coated paper was also increased sharply with the increase of chitosan concentration.The chitosan modified by laccase with 4-hexyloxyphenol has an application potential in preparing the coated packaging materials.
chitosan laccase 4-hexyloxyphenol coated paper hydrophobicity strength
Shuzhen Ni Hongqi Dai Na Liu Yingjuan Fu
Jiangsu Provincial Key Lab of Pulp and paper science and Technology,Nanjing Forestry University,Nanj Jiangsu Provincial Key Lab of Pulp and paper science and Technology,Nanjing Forestry University,Nanj Key Laboratory of Pulp & Paper Science and Technology of Ministry of Education,Qilu University of Te
国际会议
第五届制浆造纸新技术国际研讨会(ISETPP)暨第三届国际造纸与环境学术大会(IPEC)
广州
英文
1-4
2016-11-07（万方平台首次上网日期，不代表论文的发表时间）