High temperature and steam explosion united degumming of hemp fibers

The process of high temperature and steam explosion united degumming of hemp fibers was researched,and the process conditions on the fiber properties and composition separating effect of the fibers were analyzed.SEM and FTIR were used to characterize the morphology and chemical composition of the degummed fibers.The results showed that the percentage of cellulose increased significantly while that of hemicellulose and lignin had a mass loss of 81.52% and 86.68%,respectively.Furthermore,it was found that different conditions such as temperature,dosage of alkali,pretreatment,pressure and temperature of steam,pressure holding time,steaming times and so on were main factors influencing the separation of the fibers.And high temperature steaming and pre-submerging helped the swell of hemp fibers so that the required conditions of explosion treatment could be lowered accordingly.