Plasticization of Poly (lactic) acid Film as a Potential Coating Material

2017 3rd International Conference on Environmental Science and Material Application

生态环境科学;材料科学

Yang, Ping^1,2 ; Li, Hua^1 ; Liu, Qingsong^1 ; Dong, Hongbiao^1 ; Duan, Yafei^1 ; Zhang, Jiasong^1,3

Key Lab of South China Sea Fishery Resources Exploitation and Utilization, Ministry of Agriculture South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou

510300, China^1

National Demonstration Center for Experimental Fisheries Science Education, Shanghai Engineering Research Center of Aquaculture, Centre for Research on Environmental Ecology and Fish Nutrion (CREEFN), Ministry of Agriculture, Shanghai Ocean University, Shanghai

201306, China^2

Shenzhen Base of South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Shenzhen

518121, China^3

关键词: Coating material;    Elongation at break;    In-control;    Permeability properties;    Solvent casting method;    Tributyl citrates (TbC);    Water absorbency;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/108/2/022062/pdf
DOI  :  10.1088/1755-1315/108/2/022062

来源: IOP

【 摘 要 】

PLA-based composite films with different plasticizers, such as polyethylene glycol (PEG) and Tributyl citrate (TBC), were prepared using a solvent casting method and their machanical, water absorbency and NO3--N permeability properties were tested. Tensile strength, elongation at break, water absorbency and NO3--N permeability of neat PLA film were 1.99 ± 0.04 MPa, 2.7 ± 0.46%, 29.33 ± 0.3% and 216.03 ± 19.92 mg•L-1•m-2•h-1, respectively. After the addition of plasticizers the tensile strength were decreased, tensile strength of flims added 40wt% TBC and PEG decreased by 59.3% and 52.26%. While the elongation at break of the PLA film gradually increased. The elongation at break reached the value of 23.96±0.48% and 38.55±1.66% for the films added PEG and TBC respectively at the concentration of 40wt%. Water absorbency decreased as the increase of plasticizers. The NO3--N permeability attained a maximum of 300.05±10.47 and 270.97±14.54 mg•L-1•m-2•h-1for films added PEG and TBC at the concentration of 10 wt % respectively. Considered the NO3--N permeability, PEG at 10wt% seemed the better plasticizer for PLA used in control release of fertilizer.