Study of the grafting copolymerization modification of caprolactam onto hardwood pulp fiber: Effects on the physical properties of the grafted pulp
The effects of grafting on bleached hardwood pulp with caprolactam in an alkaline aqueous mediu m, with potassium persulphate/sodium bisulfite as initiator system, were studied in this paper. Both the grafting ratio and the modified pulp properties of the grafting copolymerization process had been determined. And the relevance between the modified effects and main technological parameters such as dosage of main chemicals (monomer, initiator, sodium hydroxide), reaction time and temperature were discussed. The optimum modification technology conditions were as below: the monomer concentration was 0.44mol/L, the potassium persulfate concentration was 14.8mmol/L, the mass ratio of potassium persulfate to sodium bisulfite was 1.25, the reaction temperature was 50 ℃, and the reaction time was 3 hours. The results showed that a higher grafting ratio of 28.2% could be reached under the optimized modification conditions, and the physical strength performances of the modified pulp such as tensile index, bursting index and tearing index could be improved significantly with the optimum modification conditions. But the brightness of pulp was reduced somewhat. The structure of the copolymer was characterized by FT-IR, which verified that caprolactam had been grafted onto the hardwood pulp successfully.
WANG Lijun HAN Qing XIU Huijuan XIE Yimin
College of Pulping and Papermaking Engineering,Shaanxi University of Science & Technology,Xi’an, Sha The Key Laboratory Pulp and Paper Engineering of Shandong Province, Shandong Institute of Light Indu
国际会议
2009 International Conference on Advanced Fibers and Polymer Materials(2009年先进纤维与聚合物材料国际学术会议)
上海
英文
430-433
2009-10-21（万方平台首次上网日期，不代表论文的发表时间）