<br>基于聚磷腈/磷烯混合泡沫和石蜡的环保阻燃相变复合薄膜，用于光/热双驱动形状记忆,ACS Applied Materials & Interfaces

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基于聚磷腈/磷烯混合泡沫和石蜡的环保阻燃相变复合薄膜，用于光/热双驱动形状记忆
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2024-02-02 , DOI: 10.1021/acsami.3c16953
Yang Zhou ₁ , Wei Liu ₂ , Shuangkun Zhang ₂ , Huan Liu ₁ , Zhanpeng Wu _{1,

2} , Xiaodong Wang ₁

Affiliation

多驱动形状记忆材料是一类很有前途的智能材料，在自修复、防伪、生物医学、软机器人和智能热管理应用领域引起了极大的兴趣。为了获得用于消防安全热管理应用的光/热双驱动形状记忆材料，我们设计了一种基于聚芳氧基磷腈（PDAP）/磷烯（PR）杂化物的无卤阻燃相变复合薄膜泡沫作为支撑材料，石蜡（PW）作为相变材料（PCM）。通过六氯环三磷腈的开环聚合，然后进行芳氧基的取代反应，合成了柔性泡沫基质PDAP。通过引入 PR 纳米片，PDAP 泡沫的孔隙率得到改善，从而促进 PDAP-PR/PW 复合薄膜在热管理应用中具有高潜热容。 PDAP-PR/PW复合薄膜在加热过程中可以在65 s内实现快速形状恢复，这比不含PR纳米片的相应薄膜（185 s）要短得多。此外，PDAP-PR/PW复合薄膜还表现出光驱动形状记忆行为，这要归功于PR纳米片作为高效光热材料所提供的良好的太阳能到热能的吸收和转换。更重要的是，PR纳米片的存在赋予PDAP-PR/PW复合薄膜优异的阻燃性能。 PDAP-PR/PW复合薄膜在火焰发生后2s内可自熄。通过柔性聚磷腈泡沫、PR纳米片和固液PCM的创新集成，以获得对光和热的敏感驱动响应，本研究为开发多驱动和环保阻燃形状记忆材料提供了一种新方法，以满足软执行器、热疗、控制装置等有消防安全要求的应用要求。

"点击查看英文标题和摘要"

Eco-Friendly Flame-Retardant Phase-Change Composite Films Based on Polyphosphazene/Phosphorene Hybrid Foam and Paraffin Wax for Light/Heat-Dual-Actuated Shape Memory

Multiactuated shape memory materials are a class of promising intelligent materials that have received great interest in the fields of self-healing, anticounterfeiting, biomedical, soft robotic, and smart thermal management applications. To obtain a light/heat-dual-actuated shape memory material for thermal management applications in fire safety, we have designed a type of halogen-free flame-retardant phase-change composite film based on polyaryloxyphosphazene (PDAP)/phosphorene (PR) hybrid foam as a support material and paraffin wax (PW) as a phase-change material (PCM). PDAP was synthesized as a flexible foam matrix through the ring-opening polymerization of hexachlorocyclotriphosphazene, followed by a substitution reaction of aryloxy groups. The porosity of the PDAP foam is improved by introducing PR nanosheets, facilitating a high latent heat capacity of the PDAP–PR/PW composite films for thermal management applications. The PDAP–PR/PW composite films can implement rapid shape recovery within 65 s in the heating process, which is much shorter than that of the corresponding film without PR nanosheets (185 s). Furthermore, the PDAP–PR/PW composite films also exhibit light-actuated shape memory behavior thanks to their good solar-to-thermal energy absorption and conversion contributed by PR nanosheets as a highly effective photothermal material. More importantly, the presence of PR nanosheets imparts an excellent flame-retardant property to the PDAP–PR/PW composite films. The PDAP–PR/PW composite film can be self-extinguished within 2 s after the flame. Through an innovative integration of flexible polyphosphazene foam, PR nanosheets, and solid–liquid PCM to obtain a sensitive actuating response to light and heat, this study offers a new approach for developing multiactuated and eco-friendly flame-retardant shape memory materials to meet the requirement of applications with a requirement of fire safety in soft actuators, thermal therapy, control devices, and so on.

更新日期：2024-02-02

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