MXene multi-functionalization of polyrotaxane based PCMs and the applications in electronic devices thermal management  

作　　者：Guangzhong Yin Alba Marta Lopez Ignacio Collado Antonio Vazquez-Lopez Xiang Ao Jose Hobson Silvia G.Prolongo Deyi Wang 

机构地区：[1]Escuela Politecnica Superior,Universidad Francisco de Vitoria,Ctra.Pozuelo-Majadahonda Km 1.800,28223 Pozuelo de Alarcon,Madrid,Spain [2]IMDEA Materials Institute,C/Eric Kandel,2,28906,Getafe,Madrid,Spain [3]Materials Science and Engineering Area,Escuela Superior de Ciencias Experimentales y Tecnología,Universidad Rey Juan Carlos,C/Tulipan s/n,28933,Madrid,Spain [4]Universidad Carlos III de Madrid,Departamento de Ciencia e Ingeniería de Materiales e Ingeniería Química,IAAB.Avda.Universidad,30,28911,Leganes,Madrid,Spain [5]Instituto de Tecnologías para la Sostenibilidad,Universidad Rey Juan Carlos,C/Tulipan s/n,28933,Madrid,Spain

出　　处：《Nano Materials Science》2024年第5期495-503,共9页纳米材料科学（英文版）

基　　金：supported by both BIOFIRESAFE(No.:PID2020-117274RB-I00)and NEWSAFE(No.:PID2022-143324NA-I00)Projects funded by Ministerio De Ciencia E Innovacion(MINECO,Spain);supported by the Agencia Estatal de Investigacion of Spanish Government[PROJECTS TED2021-131102B-C21 and PID2022-138496OB-I00].

摘　　要：The aim of this work was to improve the thermal conductivity and electromagnetic shielding of the leakage proof phase change materials(PCMs),in which a polyrotaxane(PLR)was used as a support material to encapsulate PEG 1k or PEG 6k and MXene as multi-functional filler.The PCMs can be processed conveniently by a hot press and the PEG 1k containing samples showed excellent flexibility.We conducted a systematic evaluation of the phase transition behavior of the material,thermal conductivity and electromagnetic shielding performance tests.Notably,the PCMs achieved a high enthalpy values(123.9–159.6 J/g).The PCMs exhibited an increase of 44.3%,and 137.5%in thermal conductivity values with higher MXene content(5 wt%)for PLR-PEG6k and PLR-PEG1k,respectively,and show high shape stability and no leakage during and after phase transition.The introduction of MXene can significantly improve the electromagnetic shielding performance of PCM composites.Typically,higher conductive samples(samples which contain high MXene contents)offer a higher EMI SE shielding,reaching a maximum of 4.67 dB at 5.6 GHz for PLR-1K-MX5.These improvements solve the main problems of organic PEG based PCMs,thus making PLR-PEG-MXene based PCMs good candidates for thermoregulators of both solid-state disks and smart phone.It is worth pointing out that the sample PLR-1k-MX5 can decrease 4.3C of the reference temperature during cellphone running.Moreover,the temperature of the protecting sheet in the simulated solid state disk with PCM was significantly lower(showing a decreasing of 7.9℃)compared with the blank sample.

关 键 词：Phase change materials Thermal regulation MXene POLYROTAXANE NANOCOMPOSITES 

分 类 号：TB34[一般工业技术—材料科学与工程]