漂白麦草浆的表面化学特性

对漂白麦草浆（BWAP）各筛分级分的化学组成及表面化学特性进行了分析。结果表明：戊糖含量基本相近，约21％；灰分含量随着网目数的增而增大，P105的灰分含量高出全浆的35％；纤维长度在1.3mm以上的浆料占24％，而长度在0.4mm以下的浆料达40％。每100gBWAP的羧基含量为9．3mmol，明显高出木浆的羧基含量，R105和P105的羧基含量超过全浆。P105的比表面积是全浆的2．34倍，是R28的3．30倍。BWAP的Zeata电位大于化学木浆，除R38电位值较小外，其余级分相差不大。

Surface Chemistry Characteristics of Bleached Wheat Straw Alkaline Pulp

The analysis on chemical components of BWAP indicated that the content of pentose in each fraction was about 21%;the ash content increased with the screen meshes,P 105 being more than 35% of whole pulp.BWAP of the fiber length more than 1.3 mm accounted for 24% and the length less than 0.4 mm was about 40%.The results of surface chemistry characteristics analysis proved that the carboxyl groups content in 100 g BWAP was about 9.3 mmol which was much higher than that in wood free pulp.The carboxyl groups content in P 105 and R 105 was higher than that in BWAP.The measurement of specific surface area showed that P 105 had 2.34 times of the whole pulp and 3.30 times that of R 28 .The Zeta potential pointed out that BWAP had a more strong potential than wood free pulp,the potential of R 28 was lower and the others were similar.