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| Optimization of preparation parameters and performance analysis of microalge-based bioplastic films |
| Received:April 18, 2024 |
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| KeyWord:Chlorella vulgaris;biodegradable plastic film;response surface method;parameter optimization;water retention property |
| Author Name | Affiliation | E-mail | | DENG Qianzhen | College of Agricultural Science and Engineering, Hohai University, Nanjing 210098, China | | | LIU Xiang | College of Agricultural Science and Engineering, Hohai University, Nanjing 210098, China | xiangliu0122@hhu.edu.cn | | LI Yaoqiang | College of Agricultural Science and Engineering, Hohai University, Nanjing 210098, China | |
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| Abstract: |
| A response surface methodology coupled with the Box-Behnken design was employed to optimize the preparation parameters（for microalgae-based biodegradable plastic films and analyze their performance. Using Chlorella vulgaris as the substrate, taking the amount of polyvinyl alcohol（PVA）, glycerol, urea as independent variables, and the tensile strength and elongation at break as the response values, the best microalge-based biodegradable plastic film was prepared. Furthermore, the potential of these films in maintaining soil moisture content when used as mulching materials was investigated. The results indicated that the content of PVA had the most significant impact on the tensile strength and elongation at break of the films, followed by glycerol. The optimal performance conditions for the microalgae-based biodegradable plastic films were achieved when PVA, glycerol, and urea were added at concentrations of 3.70 g, 2.60 mL, and 3.00 g, respectively. Under these conditions, the film exhibited a tensile strength of 3.65 MPa and an elongation at break of 556.01%. After 7-day experiment, the moisture content of soil in the mulched group still maintained at 9.85%, which was significantly higher than that of the control group（2.27%）. The research demonstrates that the bioplastic films produced after parameter optimization exhibit improved mechanical strength and toughness. When used as mulch coverings, these films can significantly enhance soil moisture content. This study provides new insights into the preparation of biodegradable plastic films and opens up new avenues for the utilization of microalgae resources. Furthermore, it offers a novel solution for mitigating the pollution caused by agricultural plastic film residues. |
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