Author(s): Wang, Cheng ; Tallian, Claudia ; Su, Jing ; Vielnascher, Robert ; Silva, Carla ; Cavaco-Paulo, Artur ; Guebitz, Georg M. ; Fu, Jiajia
Date: 2018
Persistent ID: http://hdl.handle.net/1822/56844
Origin: RepositóriUM - Universidade do Minho
Project/scholarship: info:eu-repo/grantAgreement/FCT/5876/147337/PT;
Subject(s): Engenharia e Tecnologia::Engenharia dos Materiais; Science & Technology
Ultrasound-assisted extraction of hemicellulose and phenolic compounds from bamboo bast fibre powder was investigated. The effect of ultrasonic probe depth and power input parameters on the type and amount of products extracted was assessed. The results of input energy and radical formation correlated with the calculated values for the anti-nodal point (λ/4; 16.85 mm, maximum amplitude) of the ultrasonic wave in aqueous medium. Ultrasonic treatment at optimum probe depth of 15 mm improve 2.6-fold the extraction efficiencies of hemicellulose and phenolic lignin compounds from bamboo bast fibre powder. LC-Ms-Tof (liquid chromatography-mass spectrometry-time of flight) analysis indicated that ultrasound led to the extraction of coniferyl alcohol, sinapyl alcohol, vanillic acid, cellobiose, in contrast to boiling water extraction only. At optimized conditions, ultrasound caused the formation of radicals confirmed by the presence of (+)-pinoresinol which resulted from the radical coupling of coniferyl alcohol. Ultrasounds revealed to be an efficient methodology for the extraction of hemicellulosic and phenolic compounds from woody bamboo without the addition of harmful solvents.
Financial funding from the OeAD-GmbH and the Austrian Federal Ministry of Science, Research and Economy Scientific and Technological Cooperation Programme under the grant number CN 03/2016. The authors would like to thank to Chinese Foundation Key projects of governmental cooperation in international scientific and technological innovation (No. 2016 YFE0115700), the National Natural Science Foundation of China (Grant No.31470509), and the 111 project (No.B17021). The authors would like also to thank to Portuguese Foundation for Science and Technology (FCT) under the scope of the strategic funding of UID/BIO/04469/2013 unit and COMPETE 2020 (POCI-01-0145-FEDER-006684) and BioTecNorte operation (NORTE-01-0145-FEDER-000004) funded by European Regional Development Fund under the scope of Norte2020—Programa Operacional Regional do Norte
info:eu-repo/semantics/publishedVersion
