Shang Jinzhi, Li Chang, Song Yang, Yan Mingkai, Li Lin, Hu Chaoquan
School of Chemical Engineering, Shenyang University of Chemical Technology, Shenyang, Liaoning, China.
Nanjing IPE Institute of Green Manufacturing Industry, Nanjing, Jiangsu, China.
Front Chem. 2023 Jan 12;10:1119978. doi: 10.3389/fchem.2022.1119978. eCollection 2022.
Modifying biodegradable poly (butylene adipate-co-terephthalate) (PBAT) plastic with inorganic fillers is critical for improving its overall performance, lowering the costs, and expanding its application scope. The chemical modification method for the inorganic filler determines the application performance of PBAT composites. In this work, gas-solid fluidization method was developed as a simple, efficient, and scalable strategy for chemically modifying CaCO filler. The modified CaCO filler was mixed with PBAT and melt extruded to prepare biodegradable PBAT/CaCO composites. The characterization results show that gas-solid fluidization method combines the traditional wet modification method's excellent modification effect with the scalability of the traditional dry modification method. The effects of modification methods and amount of CaCO filling on the crystallinity, mechanical, and rheological properties of PBAT/CaCO composites were compared. The results demonstrated that PBAT/CaCO composites containing 30% gas-solid fluidization modified CaCO could still maintain excellent overall performance. As a result, this work provides a simple, efficient, and scalable method for chemically modifying inorganic fillers and preparing biodegradable composites.
用无机填料改性可生物降解的聚（己二酸丁二醇酯 - 对苯二甲酸丁二醇酯）（PBAT）塑料对于提高其整体性能、降低成本和扩大其应用范围至关重要。无机填料的化学改性方法决定了PBAT复合材料的应用性能。在这项工作中，气固流化法被开发为一种简单、高效且可扩展的化学改性CaCO填料的策略。将改性后的CaCO填料与PBAT混合并熔融挤出，以制备可生物降解的PBAT/CaCO复合材料。表征结果表明，气固流化法结合了传统湿法改性方法的优异改性效果和传统干法改性方法的可扩展性。比较了改性方法和CaCO填充量对PBAT/CaCO复合材料的结晶度、力学性能和流变性能的影响。结果表明，含有30%气固流化改性CaCO的PBAT/CaCO复合材料仍能保持优异的整体性能。因此，这项工作为化学改性无机填料和制备可生物降解复合材料提供了一种简单、高效且可扩展的方法。
