In this paper,the chemical component content of Wikstroemia bast was analyzed,and the effects of five different pulping methods on the pulp properties were compared in order to select the appropriate pulping method for the Wikstroemia bast and optimize the pulping process.The experimental results showed that the nitrate ethanol cellulose was 54.6%,the lignin content was 8.7%,the pectin content was 18.1%,and the benzene-alcohol extractive content was 2.6%.Compared with the other five pulping methods,the AS-AQ pulping method had advantages in pulp yield,Kappa number,intrinsic viscosity and brightness.The optimal conditions of the pulping process are:alkali charge 14%,the degree of sulfitation 80%,the maximum temperature 140 °C,time at the heating time 1.5 h,time at the cooking temperature 3 h,and the ratio of solid to liquid 1∶5.Under the optimal conditions,the pulp yield was 60.1%,and the Kappa number was 9.7,and the intrinsic viscosity was 1115 mL/g,and the brightness was 44.7%ISO.
维普
万方数据