PSS: PEDOT接枝VO2粒子的合成、表征及热致变色性能

IF 2 4区工程技术 Q3 ENGINEERING, CHEMICAL

Advances in Polymer Technology Pub Date : 2022-09-01 DOI:10.1155/2022/1866280

Onruthai Srirodpai, J. Wootthikanokkhan, S. Nawalertpanya

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引用次数: 0

摘要

采用表面引发原子转移自由基聚合(SI-ATRP)技术，将聚苯乙烯磺酸盐(PSS)和聚3,4-乙烯二氧噻吩(PEDOT)接枝改性二氧化钒(VO2)颗粒。得到了改性VO2的临界转变温度(T c)在77 ~ 79℃之间。与丙烯酸基乳液混合后，VO2颗粒在聚合物基体中的分散性明显改善。当负载在丙烯酸聚合物膜中的改性VO2粒子浓度不大于1.0 wt%时，复合膜的可见光透过率保持在75%以上。通过丙烯酸/VO2@PSS: PEDOT的近红外透过率也比纯丙烯酸膜(无任何颗粒)下降了9-10%。最后，与控制系统(不含VO2颗粒的纯丙烯酸涂层)相比，涂有丙烯酸/VO2@PSS: PEDOT复合薄膜的玻璃基板可以将样板房内的温度降低5-6°C。总的来说，这项工作表明，通过在VO2颗粒表面接枝PSS: PEDOT链，可以在不牺牲其近红外屏蔽能力的情况下改善VO2颗粒在聚合物薄膜中的分散，同时提供最佳的接枝密度和颗粒负载。

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Synthesis, Characterizations, and Thermochromic Properties of VO2 Particles Grafted with PSS : PEDOT

Vanadium dioxide (VO2) particles were modified by grafting with poly(styrene sulfonate) (PSS) and poly(3,4-ethylenedioxythiophene) (PEDOT) via surface-initiated atom transfer radical polymerization (SI-ATRP). Critical transition temperature ( T c ) of the modified VO2 ranging between 77 and 79°C was obtained. After mixing with acrylic-based emulsion, dispersion of the VO2 particles in the polymer matrix was significantly improved. The visible light transmittance through the composite films above 75% was maintained if a concentration of the modified VO2 particles loaded into acrylic polymer film was no greater than 1.0 wt%. The NIR transmittance through the acrylic/VO2@PSS : PEDOT also dropped by 9-10%, compared with that of the pure acrylic film (without any particles). Finally, glass substrates coated with the acrylic/VO2@PSS : PEDOT composite films could reduce the temperature inside a model house by 5-6°C, compared with that of the control system (pure acrylic coating film without VO2 particles). Overall, this work demonstrated that it was possible to improve the dispersion of VO2 particles in polymer films without sacrificing its NIR shielding ability by grafting the surface of VO2 particles with PSS : PEDOT chains, while providing the optimum grafting density and particle loading.

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来源期刊

Advances in Polymer Technology 工程技术-高分子科学

CiteScore

5.50

自引率

0.00%

发文量

审稿时长

9 months

期刊介绍： Advances in Polymer Technology publishes articles reporting important developments in polymeric materials, their manufacture and processing, and polymer product design, as well as those considering the economic and environmental impacts of polymer technology. The journal primarily caters to researchers, technologists, engineers, consultants, and production personnel.