Free degree and fiber of poplar SGW pulp by the ho

2022-08-13
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Effect of compound cellulase on the freeness and specific surface area of poplar SGW pulp

Guan bin, Long Yan Quan, Xie Laisu, Hu Huiren abstract the changes of enzymatic hydrolysis products, the increased freeness of pulp and the specific surface area of fiber during the enzymatic modification of poplar SGW pulp were studied. The results showed that at the initial stage of enzymatic hydrolysis, the complex cellulase was quickly adsorbed to the surface of SGW pulp fiber for enzymatic hydrolysis, resulting in a higher rate of reducing sugar production, while the concentration of enzyme protein in the liquid phase decreased rapidly. With the progress of enzymatic hydrolysis, the increase value of pulp freeness and the specific surface area of fiber show "wavy" changes. This may be caused by the "peeling effect" on the fiber surface caused by the enzymatic hydrolysis of composite cellulase. Keywords enzymatic hydrolysis freeness of composite cellulase effect of enzymatic hydrolysis on pulp freeness and fiber specific surface area of Aspen SGW pulp Guan bin (Shanghai Institute of light industry, Jin, 250100) long Yanquan Xie Laisu Hu Huiren (Tianjin Institute of light industry, Jin, 300222) Abstract in this thesis, the products of enzymatic hydrolysis, The pump freedom and the fiber specific surface area of Aspen SGW pump in enzymatic modification zigzag experiment can also be applied through the experimental installation with two supporting rollers and one bent core n with complex cells were studied The complex cells were absorbed Al is different from the situation of "many, small and scattered" in China's medical device enterprises. Most instantaneously on the surface of the fiber at the onset of ecological hydrology During the enzymatic hydrolysis of the aspen SGW pulp fiber the reducing sugar concentration increased rapidly in the early stage , but the reducing sugar concentration was toward a constant value at the later stage. According to the test, the pump freedom increased and the fiber specific surface area (SSA) e according to the requirements, a "wave" variation as the enzymatic hydrolysis reaction e reason was that the enzymatic hydrolysis of cells produced "the peeling effect" on the surface of the words complex cells, enzymatic hydrolysis, specific surface area (SSA), This research was supported by the China Postdoctoral foundation. Guan bin (Shandong Institute of light industry, Jinan, 250100), long Yanquan (Tianjin Institute of light industry, Tianjin, 300222), Xie Laisu (Tianjin Institute of light industry, Tianjin, 300222), Hu Huiren (Tianjin Institute of light industry, Tianjin, 300222) references [1] Casey LB and Paper Chemistry and chemical technology, vol.1:189 ~ 196, Third Edition, 1980 [2] Pommier J. C, et ing enzymes to improve the process and the product quality in the recycled paper industry,Tappi J.,1989; 72(6):187~191[3]Miller G.L. Use of2. Dinitrosalicylic acid reagent for determination of reducing sugar, em., 1959; 31(3):426~428[4]Mandels M. Measurement of saccharifying cellulase,oeng. 1976; Symp., No. 6:21~34[5]Lowery otein measurements with the folin phenol reagent,em.,1951; 196:265~273[6]Pulmac's e Pulmac Permeability Tester,USA ,Can[7]Jackson zymatic modifications of secondary fiber, Tappi J.,1993; 76 (3): 147 received on: (Revised)

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