%A Jinjin WEI,Donglin XIN,Xiang CHEN,Xiyu QUAN,Junhua ZHANG %T Effect of Steam Explosion on Extraction of Bioactive Components and Gutta-percha from Barks of Eucommia ulmoides Oliver %0 Journal Article %D 2019 %J Chemistry and Industry of Forest Products %R 10.3969/j.issn.0253-2417.2019.01.013 %P 88-94 %V 39 %N 1 %U {http://www.cifp.ac.cn/CN/abstract/article_2541.shtml} %8 2019-02-28 %X

Eucommia ulmoides Oliver bark was pretreated by steam explosion, and then the pretreated bark was hydrolyzed by cellulase to extract bioactive components and gutta-percha. Effect of steam explosion pretreatment on the bioactive components, yield and molecular weight of gutta-percha from bark of E. ulmoides Oliver were investigated. The results showed that the optimal conditions for the extraction of bioactive components from untreated barks using ethonal sonication-assisted method were 40% ethanol, ultrasonic power 200 W, extraction temperature 40 ℃ and extraction time 40 min. When the conditions of steam explosion pretreatment were 3.25 MPa and 1 min, the yields of flavonoids and chlorogenic acid using ethonal sonication-assisted method were 26.83 and 1.22 mg/g, respectively, and the yields of flavonoids and chlorogenic acid extracted by cellulase hydrolysis were 19.17 and 0.93 mg/g, respectively. The solid residue of pretreated barks after enzymatic hydrolysis was used to extract gutta-percha. When the conditions of steam explosion pretreatment were 0.52 MPa and 15 min, the yields of gutta-percha was 5.92%, and the Mw and Mn of gutta-percha were 28.39×104 and 6.45×104, respectively.