Development of Intricate Aerogel Articles Using Fused Filament Fabrication

Development of Intricate Aerogel Articles Using Fused Filament Fabrication
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使用熔丝制造开发复杂的气凝胶制品

DOI:
10.1021/acsapm.9b00301
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发表时间:
2019
影响因子:
5
通讯作者:
Jana, Sadhan C.
Jana, Sadhan C.
中科院分区:
化学2区
文献类型:
--
作者:
Teo, Nicholas;Joo, Piljae;Amis, Eric J.;Jana, Sadhan C.

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使用熔丝制造工艺将聚酰亚胺气凝胶转化为双连续螺旋结构以获得增强的弹性。首先用高抗冲聚苯乙烯制作一个倒螺旋形的牺牲空心模具,并填充聚酰亚胺溶胶。在溶胶-凝胶转变之后,将模具溶解在溶剂中以产生螺旋形状的凝胶结构。将凝胶超临界干燥以恢复具有高孔隙率(98.9%)和低堆积密度(0.0146 g/cm 3)的自立式气凝胶结构。气凝胶的双连续螺旋状结构提供了显着的弹性和高断裂伸长率相比,否则脆的单片聚酰亚胺气凝胶。制造复杂气凝胶结构的能力在诸如任意形状和尺寸的传感器外壳和隔音屏障以及允许呼吸的承重多孔绝热结构等应用中开辟了巨大的潜力。
A fused filament fabrication process is used for conversion of polyimide aerogels into bicontinuous gyroid structures to obtain enhanced elasticity. A sacrificial hollow mold in an inverse gyroid shape is first fabricated from high impact polystyrene and is filled with the polyimide sol. After the sol–gel transition, the mold is dissolved in a solvent to yield the gel structure of a gyroid shape. The gel is supercritically dried to recover a free-standing aerogel structure with ultrahigh porosity (98.9%) and low bulk density (0.0146 g/cm3). The bicontinuous gyroid structure of the aerogel offers significant elasticity and high elongation at break compared to an otherwise brittle monolithic aerogel of polyimide. The ability to create intricate aerogel structures opens up a large potential in applications such as sensor housing and acoustic barriers of arbitrary shape and size and load-bearing porous thermally insulating structures that allow breathing.
DOI: 10.1038/srep34147
发表时间: 2016-09-26
期刊: Scientific reports
影响因子: 4.6
作者:
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通讯作者: Wang Q
DOI: 10.1021/acsmacrolett.7b00109
发表时间: 2017
期刊: ACS macro letters
影响因子: 7.015
作者:
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通讯作者: R. Moore
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DOI: --
发表时间: 1991
期刊:
影响因子: --
作者:
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通讯作者: M. Peleg
DOI: 10.1016/j.polymer.2018.10.030
发表时间: 2018-11-21
期刊: POLYMER
影响因子: 4.6
作者:
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通讯作者: Jana, Sadhan C.