期刊
CHEMICAL ENGINEERING JOURNAL
卷 351, 期 -, 页码 473-481出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2018.06.102
关键词
Aerogel; Fiber; Composite; Thermal conductivity
资金
- Korea Institute of Science and Technology (KIST) Institutional Program
- Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Education [2017R1C1B5077037]
- Industrial Technology Innovation Program - Ministry of Trade, Industry & Energy of Korea [10082586]
- Korea Evaluation Institute of Industrial Technology (KEIT) [10082586] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- Ministry of Science & ICT (MSIT), Republic of Korea [2Z05370] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Foundation of Korea [2017R1C1B5077037] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
The thermally insulating, fire-retardant, smokeless and flexible polymer nanofiber is an incredibly important material for mankind. This polymer nanofiber is expected to breed technological innovations in applications such as thermally insulated clothing and building materials. Here, we propose an electrospinning process to fabricate silica aerogel-filled polymer nanofibers by modifying the typical sol-gel chemistry process for the synthesis of silica aerogel. Silica aerogel-filled polyvinylidene fluoride (PVdF) nanofiber webs, fabricated using the proposed process, were fire-retardant, smokeless and flexible; they also exhibited a low thermal conductivity of 0.028 Wm(-1).K-1, which was 26.3% lower than that of pure PVdF nanofiber webs. To study the unique thermal characteristics of nanofibers theoretically, a micromechanics-based, two-scale multiphase model was proposed, with consideration of fiber structure including nano and micro pores. These developments make an important contribution to bringing silica aerogel products to everyday life.
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