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不同取代度纤维素内塑化材料的酶降解性研究    

Effect of Degree of Substitution on Enzymatic Degradation of Internally-plasticized Cellulose Material

文献类型:期刊文献

中文题名:不同取代度纤维素内塑化材料的酶降解性研究

英文题名:Effect of Degree of Substitution on Enzymatic Degradation of Internally-plasticized Cellulose Material

作者:许玉芝[1] 李芬芬[2] 王春鹏[1] 储富祥[1]

第一作者:许玉芝

机构:[1]中国林业科学研究院林产化学工业研究所生物质化学利用国家工程实验室国家林业局林产化学工程重点开放性实验室江苏省生物质能源与材料重点实验室;[2]南京林业大学化学工程学院

年份:2009

卷号:29

期号:B10

起止页码:101-104

中文期刊名:林产化学与工业

外文期刊名:Chemistry and Industry of Forest Products

收录:CSTPCD;;Scopus;北大核心:【北大核心2008】;CSCD:【CSCD_E2011_2012】;

基金:国家863计划资助(2007AA100704);国家林业局948创新重点项目(2006-4-C03);"十一五"国家科技支撑计划资助(2006BAD18B10)

语种:中文

中文关键词:取代度;纤维素酯;酶解;生物降解性

外文关键词:degree of substitution ; cellulose ester; enzymatic degradation ; biodegradation

分类号:TQ351

摘要:对不同取代度的纤维素月桂酸酯薄膜材料进行酶解处理,并运用高效液相色谱、凝胶渗透色谱(GPC)和扫描电镜(SEM)分别测定和观察了酶解过程产生的葡萄糖、降解前后的相对分子质量(Mr)及薄膜材料表观形貌。随着取代度(Ds)的降低,酶解液中的葡萄糖含量逐渐增加,葡萄糖得率也明显增加。GPC分析结果显示,样品经过酶解处理后其数均相对分子质量(Mn)减少,重均相对分子质量(Mw)增大,说明该类材料的酶降解主要是小分子质量成分的瓦解和流失。SEM图片中的薄膜表面均有斑点和凹洞出现。上述结果说明所得纤维素衍生物具有一定的酶可降解性。
A different assay was developed based on the utilization of ester enzyme and cellulolytic enzymes rather than dynamically mixed cultures found in the natural environment to degradate cellulose laurate films. The extent of biodegradation was followed by monitoring glucose production using HPLC. As the degree of substitution ( Ds ) decreased, the rate of biodegradation rates increased. After enzymatic degradation, the decrease of number-average molecular mass (Mn ) and the increase of weightaverage molecular mass (Mw ) denoted that the degradation occurred mainly from the collapse of low-molecular-mass constituents. Preferential attack of the microorganisms was observed on the face of the cellulose laurate film in SEM images. Collectively, this work indicated that the cellulose ester films with lower Ds showed definite biodegradability.

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