Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, International Innovation Center for Forest Chemicals and Materials, College of Materials Science and Engineering, Nanjing Forestry University, Nanjing, Jiangsu 210037, China; China Jiangsu Key Open Laboratory of Wood Processing and Wood-Based Panel Technology, Nanjing, Jiangsu 210037, China.
Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, International Innovation Center for Forest Chemicals and Materials, College of Materials Science and Engineering, Nanjing Forestry University, Nanjing, Jiangsu 210037, China.
Int J Biol Macromol. 2024 Nov;279(Pt 3):135238. doi: 10.1016/j.ijbiomac.2024.135238. Epub 2024 Aug 30.
There have been numerous studies on flame retardant modification of natural fiber/PLA composite materials due to the demand for applications. However, the existing flame retardant modification methods mostly involve adding flame retardants, which have a negative impact on the mechanical properties. Based on this, this study aims to introduce sulfonic groups into the cellulose of straw fibers via modification with a sulfamic acid-based deep eutectic solvent (SDES), thereby achieving flame retardance without affecting the inherent mechanical properties of the composite material. The performance enhancement of DS/PLA is manifested in the following specific aspects: the LOI reaches 36.53 %, the thermal stability is improved from 7.8 % of the residual carbon of PS/PLA to 38.4 %, and the tensile modulus is increased by 69.5 %. The preparation scheme for straw/PLA composite materials in this study is simple, economical, and efficient, and the flame retardant performance of the composite material is excellent, providing valuable references for flame retardant modification of natural fiber/plastic composite materials.
由于应用需求，已经有许多关于阻燃改性天然纤维/PLA 复合材料的研究。然而，现有的阻燃改性方法大多涉及添加阻燃剂，这会对机械性能产生负面影响。基于此，本研究旨在通过用基于磺基酸的深共晶溶剂（SDES）对稻草纤维中的纤维素进行改性，引入磺酸基团，从而在不影响复合材料固有机械性能的情况下实现阻燃性。DS/PLA 的性能增强体现在以下具体方面：LOI 达到 36.53%，热稳定性从 PS/PLA 的 7.8%残余碳提高到 38.4%，拉伸模量提高了 69.5%。本研究中稻草/PLA 复合材料的制备方案简单、经济、高效，复合材料的阻燃性能优异，为天然纤维/塑料复合材料的阻燃改性提供了有价值的参考。
