| 邓乾震,刘祥,李耀强.微藻基生物塑料薄膜制备参数优化及性能分析[J].农业环境科学学报,2025,44(4):1003-1013. |
| 微藻基生物塑料薄膜制备参数优化及性能分析 |
| Optimization of preparation parameters and performance analysis of microalge-based bioplastic films |
| 投稿时间：2024-04-18 |
| DOI：10.11654/jaes.2024-0328 |
| 中文关键词: 普通小球藻 可降解生物塑料薄膜 响应曲面法 参数优化 保水性能 |
| 英文关键词: Chlorella vulgaris biodegradable plastic film response surface method parameter optimization water retention property |
| 基金项目:国家自然科学基金项目（52309043）；中国博士后基金项目（2021M701043） |
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| 中文摘要: |
| 采用响应曲面法耦合Box-Behnken设计，对微藻基可生物降解塑料薄膜的制备参数进行优化，并对其性能进行分析。以普通小球藻（Chlorella vulgaris）为基料，以聚乙烯醇（PVA）、甘油和尿素添加量为自变量，薄膜拉伸强度和断裂伸长率为响应值，制备性能最优的微藻基可生物降解塑料薄膜，并探索其作为地膜应用时对土壤含水率的保持潜力。结果表明：PVA含量对薄膜拉伸强度和断裂伸长率的影响最大，其次为甘油，当PVA、甘油和尿素添加量分别为3.70 g、2.60 mL和3.00 g时，微藻基可生物降解塑料薄膜的性能最优，此时薄膜拉伸强度为3.65 MPa，断裂伸长率高达556.01%，覆膜实验7 d后，覆膜组土壤含水率为9.85%，显著高于对照组的2.27%。研究表明，经过参数优化后制备出的生物塑料薄膜呈现较好的机械强度和韧性，当作为地膜覆盖后，可显著提高土壤的含水率。该研究为可生物降解塑料薄膜制备提供了新思路，为微藻资源化利用开辟了新方向，更为缓解农田地膜残留污染提供了新方案。 |
| 英文摘要: |
| 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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