IMPROVEMENT OF SECONDARY FIBER BY BLENDING WITH LIGNIN POLYURETHANE
One possible way of the development of environmentally compatible polymers is to prepare biodegradable polymers,including cellulose-based polyurethane and lignin-based polyurethane.In this paper,a new polyurethane composite prepared by treating the fiber with lignin polyurethane prepolymer,a four-component system in which ethylene glycol,added as soft segment,was utilized.The strength properties and water resistance of the composite made of original fibers and secondary fibers were determined.The experimental results indicated that the strength properties and water resistance of the composites were improved because parts of hydrogen bonds were replaced by covalent bonds among cellulose.The tensile strength and ring crush strength of the composite made of secondary fibers were increased in the beginning and then decreased with the increase of acetic acid lignin (AAL) content in prepolymer,while water absorption of the composite was firstly decreased and later increased.The maximum value of tensile strength,wet strength and ring crush strength of the composite was 263.0 kN/m,101.1 kN/m and 15.42 kN/m respectively when AAL content was 8.73％,while water absorption of the composite was 22.56％.Furthermore,the strength properties of the composite made of secondary fibers was superior to those made of original fibers for more prepolymer accommodated.
secondary fiber acetic acid lignin polyurethane composite
Xiaojuan Ma Lihui Chen Aorigele Liulian Huang Shilin Cao
Material Engineering College,Fujian Agriculture and Forestry University,Fuzhou 350002,China State Key Laboratory of Pulp and Paper Engineering,South China University of Technology,Guangzhou 51
国际会议
16th International Symposium on Wood,Fiber and Pulping Chemistry(第十六届木材、纤维及制浆化学国际会议)
天津
英文
1307-1310
2011-06-08（万方平台首次上网日期，不代表论文的发表时间）