竹沥液主要组分对APMP竹浆白度的影响

Effect of Main Components of Bamboo Succus on the Brightness of Bamboo APMP

关键词:  竹沥液  白度  APMP  GC-MS  XPS

Key Words:bamboo succus  brightness  APMP  GC-MS  XPS

摘要:研究了竹沥液主要组分对粉单竹APMP浆白度的影响。通过GC-MS分析发现，竹沥液成分中不饱和键的发色或助色基团较多,含量较大的为甲苯、二甲苯和对苯二酚,其中甲苯含量为75.88%,二甲苯含量为0.98%,对苯二酚含量为0.41%,这三种物质对纸浆白度的影响都较大,尤其是对苯二酚。通过XPS分析可知,添加甲苯、二甲苯和对苯二酚后，纤维表面含CO 、O—C—O,OC—O不饱和键基团增加了。

Abstract:The effect of the main components of bamboo succus on the brightness of alkaline hydrogen peroxide chemical mechanical pulp (APMP) of Bambusa Chungii was investigated. The GC-MS analysis results showed that there are many chromophore or auxochrome groups of unsaturated bond in the bamboo succus. The contents of methyl benzene, xylene and hydroquinone in the bamboo succus are 75.88%, 0.98% and 0.41% respectively, and the three materials have great effects on APMP brightness, especially the hydroquinone, which makes the pulps brightness declines 3.4%ISO. The brightness of unbleached APMP pulp prepared with the bamboo chip pre-extracted with 60% ethanol is 5% ISO higher than the control sample, the brightness of the bleached pulp is 6.94% ISO higher, and the p.c value is lower. The succus consumes more bleaching agents, and affects the brightness and yellowing of APMP pulp badly. Through XPS analysis, the contents of non-carbohydrate and the unsaturated groups of CO , O—C—O and OC—O increase on fibers surface, but the content of carbohydrate declines.