从笋壳中提取木聚糖研究  

Study on extraction of xylan from bamboo shoot shell

作　　者：余能富[1] 吴能良 王玉[1] 涂业苟[1] 

机构地区：[1]江西省林业科学院,南昌330013 [2]江西省永丰县八江农技站,吉安331500

出　　处：《中国食品添加剂》2012年第6期107-110,共4页China Food Additives

基　　金：江西省科技攻关计划"竹笋壳提取低聚木糖技术与工艺研究"(2011ZBBF60005)资助

摘　　要：竹笋壳是竹笋加工当中的大宗废弃物,是一种极具开发潜力的资源。木聚糖是许多植物细胞壁中半纤维素的主要组分,是由β-1,4木糖苷键连接的以D-木糖残基为主链的复杂分子多聚糖。通过降解木聚糖可以得到功能性食品低聚木糖。本研究以竹笋壳为原料,采用了制备综纤维再碱抽提方法,分析了碱溶液质量分数、固液比、提取温度和提取时间对提取木聚糖得率的影响。碱提取竹笋壳中木聚糖的方法为:碱质量分数为5%,固液比为(g∶mL)1∶10,提取时间为3h,提取温度为120℃。木聚糖提取率达到原料质量的24.77%。实验结果表明,笋壳中含半纤维素为35.08%,与目前生产低聚木糖的主要原料玉米芯中半纤维素的含量相当,是提取木聚糖的较好资源。本研究为笋壳制备低聚木糖奠定了坚实的基础,也为笋壳资源的综合利用提供了基础数据。Bamboo shoot shell is the waste material of bamboo processing and has a potential usage. Xylan is the main component of hemicellulose in plant cell wall, and is linked through β - 1, 4 wood glycosidic to the main chain of the D -xylose residues polysaccharide complex molecules. We can get functional food Xylooligosaccharides through the degradation of xylan. Using bamboo shoot shell as the raw material, the experiment use alkali extraction after bamboo shoot shell was pretreated. Effects of alkali concentration, extraction temperature, ratio of solid to liquid and extraction time on yield of xylan were analyzed. The conditions of alkali extraction were ： alkali concentration 5% , ratio of solid to liq- uid 1 ： 10 （g ： mL） , extraction time 3h, extraction temperature 120~C. The yield of xylan from bamboo shoot shell reached 24. 77%, which shows that： bamboo shoot shell is a good raw material with the content of 35.08% hemicellulose in it. There is no difference in the hemicellulose content of the bamboo shoot shell and corn cob which is currently the main raw material for production of Xylooligosaecharides. This study provides a solid foundation for bamboo shell resources comprehensive utilization.

关 键 词：竹笋壳 木聚糖 低聚木糖 碱抽提 

分 类 号：TQ281[化学工程—有机化工]