1. School of Chemical Engineering, Northwest Minzu University, Lanzhou, P.R.China
2. Key Laboratory of Environment-Friendly Composites of the State Ethnic Affairs Commission, Lanzhou, P.R.China
3. Biomass Function Composites Engineering Research Center of Gansu Province, Lanzhou, P.R.China
4. Key Laboratory for Utility of Environment-friendly Composite Materials and Biomass in Universities of Gansu Province, Lanzhou, P.R.China