Application of SiO2 nanoparticle coating by electrostatic self-assembly on metal fiber felt
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摘要: 采用静电自组装技术将SiO2纳米颗粒均匀涂覆在金属纤维表面, 研究涂覆前后金属纤维毡的过滤精度、透气量、泡点压力、耐磨性及耐蚀性。结果表明, 经过纳米自组装涂覆后, 金属纤维毡具有良好的疏水性和通量匹配, 同时过滤精度、耐腐蚀性和耐磨性也有所提高, 有助于延长金属纤维毡在复杂腐蚀介质中的使用寿命。Abstract: SiO2 nanoparticles were uniformly coated on the surface of metal fibers by electrostatic self-assembly technology.The filter fineness, air-permeability, bubble-point pressure, abrasive resistance, and corrosion resistance of metal fiber felt uncoated and coated SiO2 nanoparticles by electrostatic self-assembly were investigated.The results show that, the metal fiber felt has good hydrophobicity and flux match after being coated SiO2 nanoparticles by electrostatic self-assembly, and the filtration accuracy, corrosion resistance, and abrasion resistance of the metal fiber felt are also improved, prolonging the service life of metal fiber felt in the complex corrosive medium.
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Key words:
- electrostatic self-assembly technology /
- metal fiber felt /
- nanoparticles /
- coating /
- filtration
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图 1 316L不锈钢纤维毡纤维形貌: (a)丝径4μm纤维; (b)丝径2μm纤维
Figure 1. Microstructures of 316L metal fiber felt: (a) 4μm in wire diameter; (b) 2μm in wire diameter
图 2 涂覆后纤维毡低倍率(a)和高倍率(b)形貌
Figure 2. Microstructures of the coated metal fiber felt in low magnification (a) and high magnification (b)
图 6 涂覆前后纤维毡耐磨性
Figure 6. Abrasion resistance of the uncoated and coated metal fiber felt
图 7 涂覆前后纤维毡腐蚀纤维形貌: (a)原始毡腐蚀; (b)涂覆纤维毡
Figure 7. Microstructures of metal fiber felt after corrosion test: (a) the uncoated metal fiber felt; (b) the coated metal fiber felt
表 1 涂覆前后纤维毡耐蚀性
Table 1. Corrosion resistance of the uncoated and coated metal fiber felt
样品 腐蚀前/ mg 腐蚀后/ mg 失重率/ % 原始纤维毡 1.339 1.301 2.9 涂覆纤维毡 1.454 1.432 1.5 
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