Hierarchical Ceramic Foams with 3D Interconnected Network Architecture for Superior High-Temperature Particulate Matter Capture

Abstract

Developing new filters for the effective removal of hightemperature particulate matter is of great importance but still remains a challenge. Herein, we demonstrate a novel and facile strategy for producing hierarchical ceramic foams with three-dimensional interconnected porous architecture via the combination of chemical grafting of pore-forming agent and polyurethane foaming technique. Carbamate groups are directly grafted onto carbon black surface to enhance its dispersion. Abundant micrometersized pores are generated on the cell walls of porous frameworks to form three-dimensional interconnected porous architectures, resulting in the mullite foam with high particulate matter removal efficiency and relatively low pressure drop. The optimized mullite foam exhibits integrated properties of high particulate matter removal efficiency (96.7%), ultralow pressure drop (35 Pa), and outstanding recyclability. Our results open new opportunities for fabricating efficient particulate matter filters used in high-temperature environmental fields.

Stretchable and Compressible Si3N4 Nanofiber Sponge with Aligned Microstructure for Highly Efficient Particulate Matter Filtration under High‐Velocity Airflow

“…As presented in Figure 4k, compared to electrospun or blow spinning fiber filter materials, [10,12,13,16,[28][29][30][31][32][33][34][35] our Si 3 N 4 NFS has a higher working temperature owing to its ceramic nature. Compared to ceramic-based filters, [14,[17][18][19][20][21]36] our Si 3 N 4 NFS showed better tolerance toward high airflow velocity, sharing almost the same high efficiency but significantly lower pressure drop under the same airflow velocity.…”

Superhydrophobic Self-Supporting BiOBr Aerogel for Wastewater Purification

“…The synthesized polymer had not only excellent hydrophobicity but also larger oil absorption capacity. By this token, the synthesis of superhydrophobic PU sponges with the 3D macroporous structure has more application prospects in the removal of selective oily contaminants from wastewater. , …”

“…By this token, the synthesis of superhydrophobic PU sponges with the 3D macroporous structure has more application prospects in the removal of selective oily contaminants from wastewater. 14,15 Water-soluble aromatic compound dyes with the structure of the conjugated chromophore are discharged from dyestuff plants and pharmaceutical factories (such as rhodamine B), and by using semiconductor photocatalysts to oxidize aromatic compounds, it can be able to achieve good degradation effect. 16 Bismuth halides BiOX (bismuth oxyiodide, 17 bismuth oxychloride, 18 bismuth oxybromide, 19 etc.)…”

Performance of Polyvinyl Alcohol/Bagasse Fibre Foamed Composites as Cushion Packaging Materials

“…In the logistics and transportation processes, not only is external packaging needed, but internal packaging is also needed to pack objects or fill gaps [1]. The foaming materials often used in the cushion packaging area can be divided into four categories: organic foam material, plant fiber foam material [2,3], metal foam material [4][5][6][7] and ceramic foam material [8,9]. Organic foam material is a closed cell foam made of organic materials with emulsifiers, foaming agents, curing agents and other auxiliaries such as expanded polystyrene (EPS), polyethylene foam (EPE), etc.…”