科研之友
微信
新浪微博
Facebook
分享链接
摘要
Cellulosic pulps were prepared from Stellera chamaejasme roots using soda, soda-anthraquinone (soda-AQ), and kraft pulping processes. S. chamaejasme is composed of 73.5% holocellulose, 39.7% alpha-cellulose, and 17.6% lignin, similar to wheat straw and other non-wood plant materials. The ethanol benzene extractives content of 9.2% is higher than other non-woods. The conditions used for all pulping experiments were as follows: a liquid/solid ratio of 5:1; a time-to-maximum temperature of 100 min; a maximum temperature of 160 degrees C; and a time-at-maximum temperature of 50 min. The results showed that the pulp yield was 31.27 to 36.83%, the kappa number was 16.32 to 19.42, and the pulps%26apos; intrinsic viscosity was 854 to 976 mL/g. Tear index, tensile index, burst index, and brightness of the papers made from the above unbleached pulps were 12.60 to 13.62 mN.m(2)/g, 20.57 to 22.56 mN/g, 2.16 to 2.38 kPa.m(2)/g, and 15.3 to 18.3%, respectively.
