复合纤维素酶对杨木SGW浆纤维素结晶度和微晶体尺寸的影响  

Effects of Enzymatic Modification on the Crystallinity of Cellulose and the Average Dimensions of the Cellulose Crystallite of Aspen SGW Pulp

作　　者：管斌[1] 孙艳玲[2] 隆言泉[3] 谢来苏[3] 胡惠仁[3] 

机构地区：[1]山东大学微生物技术国家重点实验室,济南250100 [2]山东轻工业学院,济南250100 [3]天津轻工业学院,天津300222

出　　处：《中国造纸学报》2000年第1期7-12,共6页Transactions of China Pulp and Paper

基　　金：中国博士后基金

摘　　要：在杨木SGW浆酶改性过程中 ,伴随酶解的进行 ,纤维素结晶度缓慢增加。在酶解初期 ,浆的纤维素结晶度增加的幅度相对较大 ;在酶解后期 ,浆的纤维素结晶度增幅较小 ,并趋于一稳定值。另外 ,伴随酶解的进行 ,酶解作用使得纤维微晶体尺寸逐渐减小。这说明杨木SGW浆酶改性主要发生在纤维表面的半纤维素存在区域和纤维素的无定形区域。伴随酶改性的进行 ,酶改性是从纤维表面逐渐向内扩散 ,在纤维表面产生“剥皮效应”。During enzymatic modification of aspen SGW pulp,the crystallinity index(CrI) increased rapidly in the early stage as the enzymatic hydrolysis proceeded.Then CrI only increased slightly and trended toward a constant value. This increase indicated that the complex cellulases readily attacked the more accessible amorphous region of cellulose and the location of hemicellulose on the surface of the fibers. On the other hand,the average dimension of the cellulose crystallite had only slight decrease during the enzymatic hydrolysis. According to the experiment results, we considered that the enzymatic hydrolysis continued to hydrolyze layer by layer and on the surfaces of the fibers produced “the peeling effect”.

关 键 词：酶解 酶改性 杨木 复合纤维素酶 结晶度 剥皮 半纤维素 微晶体 无定形 内扩散 

分 类 号：TS743.14[轻工技术与工程—制浆造纸工程] TS201.21