1. Key Laboratory of Tropical Crop Products Processing of Ministry of Agriculture and Rural Affairs, Agricultural Products Processing Research Institute of Chinese Academy of Tropical Agricultural Sciences, Guangdong 524001, PR China
2. Department of Rubber Technology and Polymer Science, Faculty of Science and Technology, Prince of Songkla University, Pattani 94000, Thailand
3. Sanya Research Institute, Chinese Academy of Tropical Agriculture Science, Haikou 570102, PR China