Chu Cen, Gao Yifei, Ma Xiangyu, Cheng Rui, Xu Pei, Ding Yunsheng
Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, and Anhui Key Laboratory of Advanced Functional Materials and Devices, Hefei University of Technology, Hefei 230009, China.
Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, and Anhui Key Laboratory of Advanced Functional Materials and Devices, Hefei University of Technology, Hefei 230009, China.
Int J Biol Macromol. 2024 Dec;282(Pt 3):136934. doi: 10.1016/j.ijbiomac.2024.136934. Epub 2024 Oct 28.
The integration of polylactic acid (PLA) fabrics with bio-based flame retardants and conductive MXene addresses the requirements for safe sustainable development and electromagnetic interference (EMI) shielding. The dehydration and carbonization of phytic acid (PA) and polyethylenimine (PEI) were facilitated by employing 3-glycidyl oxy propyl trimethoxsilane (GPTMS) as an organic crosslinking agent, which was covalently bonded to both the flame retardants and the MXene conductive layer. The prepared multifunctional PLA fabric, designated as PA-PEI-MXene-60, exhibits a high Limiting Oxygen Index (LOI) of 35.6 %, a damage length of 3.2 cm, a peak heat release rate (pHRR) reduction of 81.38 %, and total heat release (THR) reduction of 27.03 %, indicating exceptional flame-retardant properties. Concurrently, the MXene conductive layer provides outstanding EMI shielding performance. A subsequent hydrophobic treatment was applied using polydimethylsiloxane (PDMS) coatings, resulting in a water contact angle of 148.8°. Additionally, while the PLA fabrics exhibited remarkable EMI shielding effectiveness at 54 dB. Importantly, despite undergoing repeated bending and abrasion tests, these multifunctional PLA fabrics maintain relatively high EMI shielding efficiency, demonstrating commendable durability. This work significantly contributes to the research and development of bio-based, safe, durable multifunctional flame-retardant materials with EMI shielding capabilities.
聚乳酸（PLA）织物与生物基阻燃剂和导电MXene的结合满足了安全可持续发展和电磁干扰（EMI）屏蔽的要求。通过使用3-缩水甘油氧基丙基三甲氧基硅烷（GPTMS）作为有机交联剂，促进了植酸（PA）和聚乙烯亚胺（PEI）的脱水和碳化，该交联剂与阻燃剂和MXene导电层均共价键合。制备的多功能PLA织物，命名为PA-PEI-MXene-60，具有35.6%的高极限氧指数（LOI）、3.2厘米的损毁长度、81.38%的峰值热释放速率（pHRR）降低率和27.03%的总热释放（THR）降低率，表明具有优异的阻燃性能。同时，MXene导电层提供了出色的EMI屏蔽性能。随后使用聚二甲基硅氧烷（PDMS）涂层进行疏水处理，得到的水接触角为148.8°。此外，PLA织物在54 dB时表现出显著的EMI屏蔽效果。重要的是，尽管经过反复弯曲和磨损测试，这些多功能PLA织物仍保持相对较高的EMI屏蔽效率，显示出值得称赞的耐久性。这项工作对具有EMI屏蔽能力的生物基、安全、耐用的多功能阻燃材料的研发做出了重大贡献。
