通过溶液吹塑纺丝获得弹性和层状碳/二氧化硅复合纳米纤维气凝胶

IF 5.1 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Ceramics International Pub Date : 2024-09-30 DOI:10.1016/j.ceramint.2024.09.419

Wenlu Zhang , Longze Chen , Pengfei Xiang , Xue Qin , Wenbin Li , Chong He

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引用次数: 0

摘要

碳纤维气凝胶具有低密度、出色的机械性能和热稳定性等特点，在航空航天、军事和环境保护等领域的应用前景十分广阔。然而，碳纤维气凝胶的大规模生产和精确结构控制是一项重大挑战。本文采用溶液吹塑纺丝结合旋转接收装置来制造弹性片状碳/二氧化硅纳米纤维气凝胶（CSNFAs）。利用接收装置进行牵引可将 PAN 纳米纤维网络有效地组装成分层和堆叠结构。通过调节转速（500-1000 RPM），CSNFAs 的层间间距可在 30-250 μm 的范围内进行微调。CSNFAs 的介孔结构及其固有特性显著增强了吸附能力。层状结构的整合实现了对热稳定性的精确控制。利用层状结构，CSNFAs 表现出优异的压缩弹性，同时在 600 °C 至 -196 °C 的极端温度范围内保持优异的超弹性。CSNFAs 保证了在宽温度范围内的可靠性能，并支持重复使用。

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Elastic and layered carbon/silica composite nanofibrous aerogels through solution blow spinning

Carbon fibrous aerogels, distinguished by low density, outstanding mechanical properties and thermal stability, hold great promise for applications in aerospace, military, and environmental protection. However, large-scale production and precise structure control of carbon fibrous aerogels present significant challenges. Herein, solution blow spinning combined with rotating receiving apparatus was employed to fabricate elastic lamellar carbon/silica nanofibrous aerogels (CSNFAs). The utilization of receiving apparatus for traction enabled efficient assembly of PAN nanofiber networks into layered and stacked structure. Interlayer spacing of CSNFAs could be finely tuned within range of 30–250 μm by adjusting speed with range of 500–1000 RPM. The mesoporous architecture of CSNFAs, along with their intrinsic properties, significantly enhanced adsorption capabilities. Integration of lamellar structure enabled precise control over thermal stability. Capitalizing on laminated structure, CSNFAs exhibited excellent compressive elasticity while maintaining exceptional super elasticity across extreme temperatures ranging from 600 °C to −196 °C. CSNFAs guaranteed reliable performance across a wide temperature range and supported repeated use.

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来源期刊

Ceramics International 工程技术-材料科学：硅酸盐

CiteScore

9.40

自引率

15.40%

发文量

4558

审稿时长

25 days

期刊介绍： Ceramics International covers the science of advanced ceramic materials. The journal encourages contributions that demonstrate how an understanding of the basic chemical and physical phenomena may direct materials design and stimulate ideas for new or improved processing techniques, in order to obtain materials with desired structural features and properties. Ceramics International covers oxide and non-oxide ceramics, functional glasses, glass ceramics, amorphous inorganic non-metallic materials (and their combinations with metal and organic materials), in the form of particulates, dense or porous bodies, thin/thick films and laminated, graded and composite structures. Process related topics such as ceramic-ceramic joints or joining ceramics with dissimilar materials, as well as surface finishing and conditioning are also covered. Besides traditional processing techniques, manufacturing routes of interest include innovative procedures benefiting from externally applied stresses, electromagnetic fields and energetic beams, as well as top-down and self-assembly nanotechnology approaches. In addition, the journal welcomes submissions on bio-inspired and bio-enabled materials designs, experimentally validated multi scale modelling and simulation for materials design, and the use of the most advanced chemical and physical characterization techniques of structure, properties and behaviour. Technologically relevant low-dimensional systems are a particular focus of Ceramics International. These include 0, 1 and 2-D nanomaterials (also covering CNTs, graphene and related materials, and diamond-like carbons), their nanocomposites, as well as nano-hybrids and hierarchical multifunctional nanostructures that might integrate molecular, biological and electronic components.