研究目的
To prepare silver coated PET fibers with antimicrobial activity, electrical conductivity, and good coating stability using rapid polydopamine modification and electroless plating, and to investigate their properties including mechanical durability.
研究成果
The silver coated PET fibers exhibited excellent antimicrobial activity (100% for E. coli and 99.99% for S. aureus), good electrical conductivity (0.76 Ω/cm), and robust mechanical durability. The rapid PDA modification method using CuSO4/H2O2 significantly reduced processing time. These fibers are promising for functional fabrics in healthcare and smart wearables, with suggestions for future research on long-term stability and broader applications.
研究不足
The study may have limitations in scalability for industrial applications, potential variability in coating uniformity, and the use of specific chemicals like CuSO4/H2O2 which might introduce impurities or affect biocompatibility. Optimization of reaction conditions for different fiber types was not explored.
1：Experimental Design and Method Selection:
The study used a rapid polydopamine (PDA) modification method accelerated by CuSO4/H2O2, followed by electroless silver plating to functionalize PET fibers. This design aimed to reduce the time-consuming nature of traditional PDA modification.
2：Sample Selection and Data Sources:
Commercial PET multifilament yarns (1500/136/0 specification) were used. Samples included pristine PET, PDA-modified PET, and silver-coated PET fibers.
3：List of Experimental Equipment and Materials:
Materials included PET fibers, dopamine hydrochloride, Tris, silver nitrate, copper sulfate, hydrogen peroxide, ammonia, glucose, ethanol, and distilled water. Equipment included FTIR (Nicolet iS5), SEM (Phenom Pro), AFM, XRD (Bruker D8 Advance), EDS (INCAx-Sight6427), ultrasonic washer, water-resistant colorfastness tester (SW 20B), tensile testing machine, and digital multimeter.
4：Experimental Procedures and Operational Workflow:
PET fibers were cleaned, then modified with PDA using DA/CuSO4/H2O2 solution at 25°C for 1 hour. Silver was deposited via electroless plating with silver nitrate and glucose. Characterization involved FTIR, SEM, AFM, XRD, EDS. Antimicrobial tests used agar diffusion and shake flask methods. Conductivity and mechanical durability were tested with tensile loading and cyclic deformation.
5：Data Analysis Methods:
Data were analyzed using ImageJ for particle size, and statistical methods for antimicrobial efficiency calculations. Electrical resistance was measured directly with a multimeter.
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EDS
INCAx-Sight6427
Oxford
Analyze surface element compositions of fibers.
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FTIR
Nicolet iS5
USA
Characterize surface functional groups of PDA modified PET fibers using attenuated total reflectance mode.
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SEM
Phenom Pro
Netherlands
Observe surface morphology of PET fibers; samples coated with gold layer before observation.
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AFM
Analyze surface morphology and measure surface roughness of fibers.
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XRD
Bruker D8 Advance
Germany
Investigate crystalline structure of silver coated PET fibers using Cu Ka radiation.
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Ultrasonic Washer
Wash fibers under ultrasonication for durability testing.
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Water-resistant Colorfastness Tester
SW 20B
Meibang Instrument
Perform standard washing cycles for durability testing.
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Tensile Testing Machine
Measure tensile properties and change in electrical conductivity during loading.
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Digital Multimeter
Measure electrical resistance connected between grips of tensile testing machine.
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