Study on the physical and chemical and mechanical pulping characteristic of soybean straw fiber

Soybean straw production was 24.872 million t, and showed a growing trend, but the comprehensive utilization rate was lower and environmental pollution was caused. So the straw fiber physical properties, chemical and mechanical pulping properties of straw were researched, which had important practical significance for resource utilization of soybean straw. Soybean straw fiber morphology was determined by Feica microscope, statistical analysis of the length, width and length to wide ratio were studied by SPSS 17.0. Soybean straw chemical composition changes after mechanical process were analyzed by application Block test method with Design-expert6.0.10.The result present that hemi-cellulose, cellulose and lignin of mechanically processed soybean straw fiber had significant difference. Hemicellulose increased by 5.22%, cellulose reduced by7.55%, lignin reduced by 3.22%. Beating degree was positively correlated with the pulping time,fiber broom rate increased in accordance with 1.87 SR°/min, beating time and wet weight were a negative correlation,rate decreasesd according to 0.28g/min.