毛竹硫酸盐法蒸煮及其全无氯漂白浆的特性

Kraft Pulping and TCF Bleaching Performances of Phyllostachys Pubescens Stem

对采自杭州小和山的毛竹的化学成分和纸浆特性进行了分析,并与桉木、杉木和洋麻韧皮的蒸煮及漂白特性作了比较;结果表明,毛竹的木素含量与桉木相似,而木糖含量则高于洋麻韧皮和桉木。毛竹硫酸盐蒸煮脱木素速率与桉木相似,快于洋麻韧皮,但纸浆得率相比较低。在卡伯值为20左右时,毛竹纸浆得率与杉木相近。毛竹未漂浆的白度高于桉木和洋麻韧皮,己烯糖醛酸(HexA)的含量低。毛竹浆氧脱木素后白度高于桉木浆和洋麻韧皮浆。

Bamboo is commonly used as a raw material at some of pulp mills.In this study,Phyllostachys pubescens obtained from Xiaohe-shan,Hangzhou was chemically analyzed,cooked with kraft process and bleached with totally chlorine-free（TCF） bleaching.In addition,P.pubescens stem was compared with Hibiscus cannabinus bast,Cryptomeria japonica D.Don wood and Eucalyptus grandis wood.The lignin content of P.pubescens stem is similar to that of E.grandis wood and the xylan content of P.pubescens is higher compared with the others.In kraft cooking,the delignification rate of P.pubescens is equal to that of E.grandis and better than that of H.cannabinus bast.However,in a given kappa number the pulp yield of P.pubescens is lower than that of both E.gradis and H.cannabinus bast and is equal to that of C.japonica.The hexenuronic acid content of P.pubescens kraft pulp is lower than that of H.cannabinus bast and E.grandis.The brightness of unbleached pulp prepared from P.pubescens is much higher than that from H.cannabinus and E.gradis.The P.pubescens pulp has higher brightness after oxygen bleaching than the pulps of the H.cannabinus and E.grandis.