双重刺激-响应三元核-壳Polystyrene@Pnipam - Pedot乳胶

IF 2.7 4区 材料科学 Q3 CHEMISTRY, PHYSICAL Particle & Particle Systems Characterization Pub Date : 2023-10-12 DOI:10.1002/ppsc.202300096
Lyudmyla O. Vretik, Yuriy V. Noskov, Oksana M. Chepurna, Nikolay A. Ogurtsov, Olena A. Nikolaeva, Andrii I. Marynin, Tymish Y. Ohulchanskyy, Alexander A. Pud
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引用次数: 1

摘要

刺激反应材料对外部刺激的反应能力取决于其分子内和分子间的相互作用,而分子内和分子间的相互作用又受材料成分变化的支配。本文报道了这些因素对新型核-壳纳米颗粒热敏和光敏感乳胶的重要性,聚苯乙烯内核,含有掺杂聚(3,4 -乙烯二氧噻吩)(PEDOT)的聚(N -异丙基丙烯酰胺)(PNIPAM)外壳。发现壳中的氢键、C = O─π芳香、亲疏水相互作用引起PNIPAM的构象变化,类似于在PNIPAM线圈-球状转变中发生的构象变化。根据EDOT:PS@PNIPAM进料比和PNIPAM壳中PEDOT含量的不同,这些相互作用和变化会影响纳米颗粒的大小,并负责将PNIPAM壳中的较低临界溶液温度(LCST)从32.1°C转移到33.9°C。只有当EDOT添加量为≈9 wt.%时,纳米颗粒的核壳形态才能保持。在较高的EDOT含量下,PNIPAM炮弹被破坏。合成的PS@PNIPAM - PEDOT乳胶表现出温度依赖行为,并在近红外照射下产生光热效应,这使得它们的温度高于最低温度。这种双刺激(热和光)响应性表明,这些乳胶有可能用于药物或诊断药物的输送。
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Dual Stimuli‐Responsive Ternary Core‐Shell Polystyrene@Pnipam‐Pedot Latexes
Abstract The ability of stimuli‐responsive materials to respond to external stimuli depends on their intra‐ and intermolecular interactions, which, in turn, are governed by changes in the material composition. Here, the importance of these factors for new heat and light‐sensitive latexes of core‐shell nanoparticles is reported with the polystyrene core, the poly(N‐isopropylacrylamide) (PNIPAM) shell containing doped poly(3,4‐ethylenedioxythiophene) (PEDOT). It is found that hydrogen bonding, C═O─π aromatic, hydrophilic‐hydrophobic interactions in the shell cause conformational changes in PNIPAM similar to those occurring in the PNIPAM coil‐globule transition. Depending on the EDOT:PS@PNIPAM feed ratio and the PEDOT content in PNIPAM shells, these interactions and changes affect nanoparticle sizes and are responsible for shifting the lower critical solution temperature (LCST) of PNIPAM in the shell from 32.1 to 33.9 °C. The core‐shell morphology of nanoparticles is maintained only for latexes with EDOT feed to ≈9 wt.%. At the higher EDOT content, PNIPAM shells are destroyed. Synthesized PS@PNIPAM‐PEDOT latexes demonstrate temperature‐dependent behavior and produce a photothermal effect under NIR irradiation, which allows for a rise of their temperature above LCST. This dual stimuli (heat and light) responsiveness suggests an important possibility for these latexes to be used for drug or diagnostic agent delivery.
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来源期刊
Particle & Particle Systems Characterization
Particle & Particle Systems Characterization 工程技术-材料科学:表征与测试
CiteScore
5.50
自引率
0.00%
发文量
114
审稿时长
3.0 months
期刊介绍: Particle & Particle Systems Characterization is an international, peer-reviewed, interdisciplinary journal focusing on all aspects of particle research. The journal joined the Advanced Materials family of journals in 2013. Particle has an impact factor of 4.194 (2018 Journal Impact Factor, Journal Citation Reports (Clarivate Analytics, 2019)). Topics covered include the synthesis, characterization, and application of particles in a variety of systems and devices. Particle covers nanotubes, fullerenes, micelles and alloy clusters, organic and inorganic materials, polymers, quantum dots, 2D materials, proteins, and other molecular biological systems. Particle Systems include those in biomedicine, catalysis, energy-storage materials, environmental science, micro/nano-electromechanical systems, micro/nano-fluidics, molecular electronics, photonics, sensing, and others. Characterization methods include microscopy, spectroscopy, electrochemical, diffraction, magnetic, and scattering techniques.
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