Wu Zilong, Boyer Cyrille
Cluster for Advanced Macromolecular Design and Australian Centre for NanoMedicine, School of Chemical Engineering, The University of New South Wales, Sydney, NSW, 2052, Australia.
Adv Sci (Weinh). 2023 Nov;10(33):e2304942. doi: 10.1002/advs.202304942. Epub 2023 Sep 26.
Photoinduced reversible deactivation radical polymerization (photo-RDRP) or photoinduced controlled/living radical polymerization has emerged as a versatile and powerful technique for preparing functional and advanced polymer materials under mild conditions by harnessing light energy. While UV and visible light (λ = 400-700 nm) are extensively employed in photo-RDRP, the utilization of near-infrared (NIR) wavelengths (λ = 700-2500 nm) beyond the visible region remains relatively unexplored. NIR light possesses unique properties, including enhanced light penetration, reduced light scattering, and low biomolecule absorption, thereby providing opportunities for applying photo-RDRP in the fields of manufacturing and medicine. This comprehensive review categorizes all known NIR light-induced RDRP (NIR-RDRP) systems into four mechanism-based types: mediation by upconversion nanoparticles, mediation by photocatalysts, photothermal conversion, and two-photon absorption. The distinct photoinitiation pathways associated with each mechanism are discussed. Furthermore, this review highlights the diverse applications of NIR-RDRP reported to date, including 3D printing, polymer brush fabrication, drug delivery, nanoparticle synthesis, and hydrogel formation. By presenting these applications, the review underscores the exceptional capabilities of NIR-RDRP and offers guidance for developing high-performance and versatile photopolymerization systems. Exploiting the unique properties of NIR light unlocks new opportunities for synthesizing functional and advanced polymer materials.
光诱导可逆失活自由基聚合(photo-RDRP)或光诱导可控/活性自由基聚合已成为一种通用且强大的技术,可通过利用光能在温和条件下制备功能性和先进的聚合物材料。虽然紫外光和可见光(λ = 400 - 700 nm)在photo-RDRP中被广泛应用,但可见光区域以外的近红外(NIR)波长(λ = 700 - 2500 nm)的利用仍相对未被探索。近红外光具有独特的性质,包括增强的光穿透性、减少的光散射和低生物分子吸收,从而为在制造和医学领域应用photo-RDRP提供了机会。这篇综述将所有已知的近红外光诱导的RDRP(NIR-RDRP)系统分为基于四种机制的类型:上转换纳米粒子介导、光催化剂介导、光热转换和双光子吸收。讨论了与每种机制相关的不同光引发途径。此外,本综述强调了迄今为止报道的NIR-RDRP的各种应用,包括3D打印、聚合物刷制备、药物递送、纳米粒子合成和水凝胶形成。通过展示这些应用,本综述强调了NIR-RDRP的卓越能力,并为开发高性能和通用的光聚合系统提供了指导。利用近红外光的独特性质为合成功能性和先进的聚合物材料带来了新的机会。