Novel method of fabricating lightweight thermally insulation fibrous composites for energy saving

IF 1.8 4区 材料科学 Q2 MATERIALS SCIENCE, CERAMICS
Danyang Qiu, Shujing Li, Yuanbing Li, Zhen Cai, Chengzhen Fu, ChangDong Wei
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Abstract

Fiberboard (FB) is extensively utilized in heat‐insulating refractory materials owing to its lightweight nature and excellent resistance to high temperatures. Nevertheless, the inadequate mechanical properties and limited dimensional stability of FB hinder its further application. The vacuum filtration was utilized in this study to manufacture inorganically modified insulation FB, incorporating plus fiber/1260 fiber and silica sol as the primary constituents and sepiolite powder (HS) as the modifier. The experimental results show that the fabricated samples exhibited extremely high porosity (75.3%–90.2%) and low thermal conductivity (.063–.15 W m−1 K−1, 200–800°C). The fibers were arranged in a three‐dimensional structure, overlapping with each other, and the silica sol adhered to the fibers, forming a spatial mesh structure through cross‐linking. Importantly, the incorporation of HS was effective in controlling the agglomeration of the silica sol, leading to a more uniform distribution within the fibers. Additionally, the study found that the mechanical properties (high hardness (64–72 HA)) and high‐temperature durability of the FBs were enhanced due to the flocculant modification. This study highlights promising prospects for industrial applications and offers a cost‐effective admixture for modifying and preparing high‐performance FBs, which is expected to see broad adoption in thermal insulation and energy conservation applications.
用于节能的轻质隔热纤维复合材料的新型制造方法
纤维板(FB)因其轻质和出色的耐高温性能而被广泛应用于隔热耐火材料中。然而,纤维板机械性能的不足和有限的尺寸稳定性阻碍了它的进一步应用。本研究利用真空过滤法制造了无机改性隔热 FB,以 plus 纤维/1260 纤维和硅溶胶为主要成分,以海泡石粉末(HS)为改性剂。实验结果表明,制造出的样品具有极高的孔隙率(75.3%-90.2%)和较低的热导率(0.063-0.15 W m-1 K-1,200-800°C)。纤维呈三维结构排列,相互重叠,二氧化硅溶胶附着在纤维上,通过交联形成空间网状结构。重要的是,HS 的加入能有效控制硅溶胶的团聚,使其在纤维内的分布更加均匀。此外,研究还发现,由于絮凝剂的改性,FB 的机械性能(高硬度(64-72 HA))和高温耐久性都得到了提高。这项研究强调了工业应用的广阔前景,并为改性和制备高性能 FB 提供了一种具有成本效益的外加剂,有望在隔热和节能应用中得到广泛采用。
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来源期刊
International Journal of Applied Ceramic Technology
International Journal of Applied Ceramic Technology 工程技术-材料科学:硅酸盐
CiteScore
3.90
自引率
9.50%
发文量
280
审稿时长
4.5 months
期刊介绍: The International Journal of Applied Ceramic Technology publishes cutting edge applied research and development work focused on commercialization of engineered ceramics, products and processes. The publication also explores the barriers to commercialization, design and testing, environmental health issues, international standardization activities, databases, and cost models. Designed to get high quality information to end-users quickly, the peer process is led by an editorial board of experts from industry, government, and universities. Each issue focuses on a high-interest, high-impact topic plus includes a range of papers detailing applications of ceramics. Papers on all aspects of applied ceramics are welcome including those in the following areas: Nanotechnology applications; Ceramic Armor; Ceramic and Technology for Energy Applications (e.g., Fuel Cells, Batteries, Solar, Thermoelectric, and HT Superconductors); Ceramic Matrix Composites; Functional Materials; Thermal and Environmental Barrier Coatings; Bioceramic Applications; Green Manufacturing; Ceramic Processing; Glass Technology; Fiber optics; Ceramics in Environmental Applications; Ceramics in Electronic, Photonic and Magnetic Applications;
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