Yanyan Wei, Yao Wang, Yang Liu, Pinhua Rao, Jian Guo, Guanghui Li
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引用次数: 0
摘要
碳化硅(SiC)陶瓷膜因其耐高温、耐腐蚀、亲水性好、高通量和高机械强度等优异性能而备受追捧。然而,如何稳定调节用于制备膜的高固含量 SiC 浆料仍然是一项重大挑战。本研究提出了一种新方法,通过控制固含量、pH 值、球磨时间和喷涂参数等参数来稳定高固含量 SiC 浆料的分散。此外,还系统地研究了不同研磨时间对碳化硅粒度和膜性能的影响,首次建立了研磨时间与粒度之间的直接相关性。研究结果表明,延长球磨时间,特别是 18 个小时,会使膜孔径明显减小约 40%,同时显著提高截留性能,500 纳米荧光微球的平均截留率从 54.61% 大幅提高到 98.89%。这项研究不仅为稳定制备陶瓷浆料提供了一种实用的方法,还为膜形态控制和孔径调节提供了重要参考。这些见解为推动碳化硅膜技术在废水处理和资源回收等应用领域的发展带来了重大希望。
Stabilizing High Solid Content Slurries for SiC Membrane Preparation with Enhanced Separation Performances
Silicon carbide (SiC) ceramic membranes are highly sought-after for their exceptional properties including high temperature resistance, corrosion resistance, good hydrophilicity, high flux, and high mechanical strength. However, achieving stable regulation of high solid content SiC slurries for membrane preparation remains a significant challenge. This study presents a novel approach to stabilize the dispersion of high solid content SiC slurries by controlling parameters such as solid content, pH, ball milling time and spray coating parameters. Furthermore, the impact of different milling durations on SiC particle size and membrane performance is systematically investigated, establishing, for the first time, a direct correlation between milling time and particle size. The investigations reveal that prolonged ball milling, specifically 18 hours, results in a notable reduction in membrane pore size by approximately 40%, accompanied by a remarkable enhancement in retention performance, as evidenced by a substantial increase in the average retention rate for 500 nm fluorescent microspheres from 54.61% to 98.89%. This study not only offers a practical method for the stable preparation of ceramic slurries, but also provide important reference for membrane morphology control and pore size regulation. These insights hold significant promise for advancing SiC membrane technology in applications such as wastewater treatment and resource recovery.
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.