2/g,孔體積為2.423 cm3/g,平均孔徑為15.1nm。PAN預(yù)氧絲復(fù)合后的氣凝膠依然具有優(yōu)異的熱學(xué)性能,在常溫下熱導(dǎo)率為0.032W/(m.K)。力學(xué)性能有了很好的改善,壓縮模量為1.499MPa,比純RF氣凝膠提高了0.6倍。"/>

最新色国产精品精品视频,中文字幕日韩一区二区不卡,亚洲有码转帖,夜夜躁日日躁狠狠久久av,中国凸偷窥xxxx自由视频

+高級檢索
PAN預(yù)氧絲復(fù)合RF氣凝膠的性能研究
DOI:
作者:
作者單位:

同濟(jì)大學(xué) 物理科學(xué)與工程學(xué)院,同濟(jì)大學(xué) 物理科學(xué)與工程學(xué)院,同濟(jì)大學(xué) 物理科學(xué)與工程學(xué)院,同濟(jì)大學(xué) 物理科學(xué)與工程學(xué)院

作者簡介:

通訊作者:

中圖分類號:

基金項(xiàng)目:

國家重點(diǎn)研發(fā)計(jì)劃重點(diǎn)專項(xiàng)(2017YFA0204600);上海航天科技創(chuàng)新基金(SAST201469,SAST201321)


Performance of the RF aerogels composited PAN pre-oxidized fibers
Author:
Affiliation:

Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology,School of Physics Science and Engineering,Tongji University,Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology,School of Physics Science and Engineering,Tongji University,Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology,School of Physics Science and Engineering,Tongji University,Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology,School of Physics Science and Engineering,Tongji University

Fund Project:

National Key Research and Development Program of China (2017YFA0204600), Science and Technology Innovation Fund of Shanghai Aerospace (SAST201469, SAST201321).

  • 摘要
    • |
  • 圖/表
    • |
  • 訪問統(tǒng)計(jì)
    • |
  • 參考文獻(xiàn)
    • |
  • 相似文獻(xiàn)
    • |
  • 引證文獻(xiàn)
    • |
  • 資源附件
    • |
  • 文章評論
    摘要:

    本文以間苯二酚(C6H4(OH)2)和甲醛(HCHO)為前驅(qū)體,碳酸鈉(Na2CO3)為催化劑,采用溶膠-凝膠技術(shù)、超臨界干燥工藝制備了間苯二酚-甲醛(RF)氣凝膠。另外,通過添加聚丙烯腈(PAN)預(yù)氧絲改善了RF氣凝膠的力學(xué)性能,制備了PAN預(yù)氧絲復(fù)合RF氣凝膠。文中通過調(diào)節(jié)質(zhì)量分?jǐn)?shù)ω、間苯二酚與催化劑摩爾比(R/C值)這兩個參數(shù)對微結(jié)構(gòu)進(jìn)行調(diào)控,其中選取質(zhì)量分?jǐn)?shù)ω為15%, R/C值為100和500的氣凝膠進(jìn)行比較,經(jīng)過分析可知R/C值為100的氣凝膠性能優(yōu)良,復(fù)合后樣品的比表面積變?yōu)?18.6 m2/g,孔體積為2.423 cm3/g,平均孔徑為15.1nm。PAN預(yù)氧絲復(fù)合后的氣凝膠依然具有優(yōu)異的熱學(xué)性能,在常溫下熱導(dǎo)率為0.032W/(m.K)。力學(xué)性能有了很好的改善,壓縮模量為1.499MPa,比純RF氣凝膠提高了0.6倍。

    Abstract:

    The resorcinol–formaldehyde (RF) aerogels composited polyacrylonitrile (PAN) pre-oxidized fibers were prepared by a sol-gel method combined with the CO2 supercritical drying technique using resorcinol (C6H4(OH)2) and formaldehyde (HCHO) as the precursors andSsodium carbonate as catalyzer respectively, enhanced frame support by PAN pre-oxidized fibers in the solvent. The sample composition is characterized by using Fourier transform infrared spectrometer. Field emission scanning electron microscopy (FESEM), surface area and pore size analyzer were used to investigate the microtopography and the microstructure of the RF aerogels composited PAN pre-oxidized fibers with the nanoporous structure. Compared with the pure RF aerogel, the excellent thermal conductivity of the RF aerogels composited PAN pre-oxidized fibers is 0.032W/mK at 25°C and Young"s modulus of 1.499MPa has increased 0.6 time.

    參考文獻(xiàn)
    相似文獻(xiàn)
    引證文獻(xiàn)
引用本文

吳學(xué)玲,張志華,沈軍,許清華. PAN預(yù)氧絲復(fù)合RF氣凝膠的性能研究[J].稀有金屬材料與工程,2018,47(S2):104~107.[Wu Xueling, Zhang Zhihua?,Shen Jun?,Xu Qinghua. Performance of the RF aerogels composited PAN pre-oxidized fibers[J]. Rare Metal Materials and Engineering,2018,47(S2):104~107.]
DOI：[doi]

復(fù)制
文章指標(biāo)
  • 點(diǎn)擊次數(shù):
  • 下載次數(shù):
  • HTML閱讀次數(shù):
  • 引用次數(shù):
歷史
  • 收稿日期:2017-12-04
  • 最后修改日期:2017-12-08
  • 錄用日期:2018-02-02
  • 在線發(fā)布日期: 2018-11-01
  • 出版日期: