私密直播全婐app免费大渔直播,国产av成人无码免费视频,男女同房做爰全过程高潮,国产精品自产拍在线观看

相關(guān)鏈接
聯(lián)系方式
  • 通信地址:陜西省西安市友誼西路127號(hào)
  • 郵編:710072
  • 電話:029-88431638
  • 傳真:
  • Email:nwpugjw@163.com
當(dāng)前位置:> 首頁 > 最新動(dòng)態(tài) > 正文
SFPC課題組導(dǎo)熱高分子材料研究成果發(fā)表在J Mater Sci Technol上

Xutong Yang, Xiao Zhong, Junliang Zhang and Junwei Gu*. Intrinsic high thermal conductive liquid crystal epoxy film simultaneously combining with excellent intrinsic self-healing performance. Journal of Materials Science & Technology, 2021, 68(30): 209-215. 2019IF=6.155.(1區(qū)材料科學(xué)Top期刊,中國(guó)科技期刊卓越行動(dòng)計(jì)劃入選項(xiàng)目-重點(diǎn)期刊類項(xiàng)目)(https://doi.org/10.1016/j.jmst.2020.08.027)

Abstract: One kind of side chain liquid crystal epoxy (S-LCE) based on biphenyl mesomorphic unit is synthesized from 2, 2-bis(hydroxymethyl)propionic acid, 4-phenylphenol, and epichlorohydrin. And the intrinsic thermal conductive liquid crystal epoxy film (LCEF) simultaneously combining with intrinsic self-healing performance is then prepared via thiol-epoxide nucleophilic ring-opening reaction and coating method. 1H NMR and FTIR show that S-LCE and LCEF have been successfully prepared. S-LCE presents nematic liquid crystal from room temperature to 160°C. LCEF maintains nematic liquid crystal performance and shows highly intrinsic thermal conductivity & excellent self-healing performance. Thermal conductivity coefficient (λ) values in vertical direction (λ) and parallel direction (λ) of LCEF are 0.33 and 1.25 W/mK, respectively, much higher than that of general bisphenol A epoxy resin (E-51, λ of 0.19 W/mK and λ of 0.65 W/mK). Tensile strength of LCEF is 10.6 MPa, which can maintain at 90.6% and 61.3% after one and four cycles of self-healing behavior, respectively. In addition, LCEF presents a wide service temperature range (-9.8–251°C) and good thermal stability (THRI of 148.5°C). Simultaneously, LCEF has good transparency, flexibility, and tailorability, expected to be utilized in the fields of flexible electronic devices and intelligent structures.以2,2-二羥甲基丙酸、4-苯基苯酚和環(huán)氧氯丙烷為主要原料合成了一種基于聯(lián)苯介晶基元的側(cè)鏈型液晶環(huán)氧(S-LCE),再通過硫醇-環(huán)氧親核開環(huán)反應(yīng)配合涂膜成型工藝制備了一種基于酯交換反應(yīng)實(shí)現(xiàn)自修復(fù)功能的本征型高導(dǎo)熱液晶環(huán)氧膜(LCEF)。核磁共振氫譜(1H NMR)和紅外光譜(FTIR)表明S-LCE及LCEF均已成功合成;S-LCE表現(xiàn)為向列相液晶,其液晶區(qū)間為常溫~160oC;LCEF仍保持向列相液晶性,且表現(xiàn)出優(yōu)異的本體導(dǎo)熱性能和自修復(fù)功能;其垂直方向(λ)和平行方向(λ)的導(dǎo)熱系數(shù)分別為0.33 W/mK和1.52 W/mK,遠(yuǎn)高于通用雙酚A環(huán)氧樹脂(E-51)的λ(0.19 W/mK)和λ(0.65 W/mK);LCEF的拉伸強(qiáng)度為10.6 MPa,經(jīng)1次和4次修復(fù)后的拉伸強(qiáng)度分別保持在90.6 %和61.3%;此外,LCEF表現(xiàn)出較寬的使用溫度范圍(-9.8~251oC)和較好的熱穩(wěn)定性(耐熱指數(shù),THRI為148.5oC);同時(shí),LCEF還具有較好的透明性、柔韌性和可裁剪性,有望在柔性電子器件和智能結(jié)構(gòu)等領(lǐng)域得到應(yīng)用。

主站蜘蛛池模板: 澜沧| 广宁县| 海兴县| 黄龙县| 商水县| 武胜县| 合阳县| 大化| 徐汇区| 丰都县| 会昌县| 成都市| 商水县| 天台县| 绍兴县| 鱼台县| 什邡市| 梁山县| 昔阳县| 黔西| 海原县| 西畴县| 汉中市| 临沭县| 大洼县| 新晃| 三台县| 哈尔滨市| 乌拉特后旗| 女性| 瑞丽市| 阳新县| 清新县| 宁德市| 仁寿县| 杨浦区| 鄯善县| 响水县| 上犹县| 房产| 南岸区|