Biodegradable polylactic acid/PBAT/thermoplastic starch composite foam material and preparation method thereof

• Main Authors: PENG KANGMING, WANG JIANLEI, WU LIXIN, CAI ZEWEI
• Format: Patent
• Language: Chinese; English
• Published: 02.02.2024
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; GENERAL PROCESSES OF COMPOUNDING; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS; WORKING-UP

The invention provides a biodegradable polylactic acid/PBAT/thermoplastic starch composite foam material and a preparation method thereof.The preparation method comprises the steps that firstly, corn starch is plasticized and modified through a plasticizer and a coupling agent, and the thermoplasticity of the starch is enhanced; meanwhile, the polylactic acid/thermoplastic starch is subjected to in-situ compatibilization and toughening modification by using a nucleating agent and a toughening agent. The production process is simple, and by optimizing the components of the foaming material, the cost of the foaming body is greatly reduced, and meanwhile, the performance of the foaming material is improved. 本发明提供一种生物可降解聚乳酸/PBAT/热塑性淀粉复合发泡材料及其制备方法，所述制备方法中先以增塑剂和偶联剂对玉米淀粉进行增塑改性，增强淀粉的热塑性；同时以成核剂和增韧剂对聚乳酸/热塑性淀粉进行原位增容增韧改性。本发明生产工艺简单，通过对发泡材料进行成分组成的优化，发泡体成本大大降低，同时提升了发泡材料的性能。