研究目的
To develop a universal strategy to improve the properties of PET fibers, such as UV resistance, hydrophobicity, and thermal resistance, by depositing a highly durable and robust ZnO layer onto PET fabric.
研究成果
The study successfully developed a new method to fabricate highly durable polysiloxane-ZnO coated PET fabric via the processes of RIGP and in-situ mineralization. The PET-g-PMAPS/ZnO fabric showed excellent UV resistance, durability, thermal resistance, and super-repellence toward atmospheric alteration, and inhibited the photocatalytic self-degradation caused by the high photocatalytic activity of ZnO nanoparticles. The coating of ZnO nanoparticles roughens the surface of the fabric dramatically, and superhydrophobicity can be attained by simply annealing at 200 oC in ambient air.
研究不足
The study focuses on the improvement of PET fibers' properties through the deposition of a ZnO layer, but the mechanical properties of the modified PET fibers decrease sharply due to the hydrolysis of the ester bonds of the PET fabric caused by the presence of base in the process of depositing ZnO nanoparticles.
1：Experimental Design and Method Selection
The methodology involved radiation-induced graft polymerization (RIGP) of γ-methacryloxypropyl trimethoxysilane (MAPS) onto PET fabric followed by sol-gel in situ mineralization with zinc acetate to produce wurtzite nanocrystalline ZnO.
2：Sample Selection and Data Sources
PET fabrics were provided by Zhejiang Unifull Industrial Fibre Co., Ltd. All chemical reagents were obtained from Sinopharm Chemical Reagent Co., Ltd. (China).
3：List of Experimental Equipment and Materials
PET fabrics, ethanol, acetone, γ-methacryloxypropyl trimethoxysilane (MAPS), sodium hydroxide, ZnC4H6O4?2H2O, FT-IR spectrometer (Tensor 27, Bruker Co. USA), X-ray photoelectron spectroscopy (XPS) analysis (PHI-5702 electron spectrometer), X-ray diffraction (XRD) spectrum (RIGAKU D/MAX2200), SEM (Merlin Compact, Zeiss), water contact angle measurement system (Attension Theta system, KSV Instruments Ltd., Finland), TG 209 F3 tarsus (NETZSCH, Germany), DSC-60 Shimadzu, UV-vis absorption spectra (Ruili 1100 spectrophotometer, Cary 50, America), standard washing equipment (Model SW-12AII, Wenzhou Darong Textile Instrument Co., Ltd., China), electronic single fiber tensile strength tester (LLY-06E, Laizhou Electron Instrument Co. Ltd. China).
4：Experimental Procedures and Operational Workflow
PET fabric was cleaned with acetone in Soxhlet extractor. Simultaneous radiation-induced graft polymerization was carried out by irradiating PET fabric with a cumulative absorbed dose of 20 kGy. The grafted PET fabric was extracted with ethanol to eliminate the homopolymer and residual monomer. PET-g-PMAPS/ZnO was prepared by adding zinc acetate into a three-necked flask containing absolute ethanol, followed by stirring and adding a mixture of ethanol, deionized water, and sodium hydroxide. The obtained fabric was cleaned thoroughly in ethanol with ultrasonic at ambient temperature.
5：Data Analysis Methods
ATR-IR, XPS, XRD, SEM, water contact angle measurement, TG, DSC, UV-vis absorption spectra, washing durability test, mechanical properties test.
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Water contact angle measurement system
Attension Theta system
KSV Instruments Ltd., Finland
Used for hydrophobicity assessment.
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FT-IR spectrometer
Tensor 27
Bruker Co. USA
Used for ATR-IR analysis.
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SEM
Merlin Compact
Zeiss
Used for surface morphology analysis.
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PET fabrics
plain weave，weight: 425±20 g/m2
Zhejiang Unifull Industrial Fibre Co., Ltd
Used as the base material for the experiment.
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X-ray photoelectron spectroscopy (XPS) analysis
PHI-5702 electron spectrometer
Used for surface chemical compositions analysis.
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X-ray diffraction (XRD) spectrum
RIGAKU D/MAX2200
Used for crystal structures analysis.
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TG 209 F3 tarsus
NETZSCH, Germany
Used for thermal stability assessment.
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DSC-60 Shimadzu
Used for thermal characteristics study.
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UV-vis absorption spectra
Ruili 1100 spectrophotometer
Cary 50, America
Used for UV-vis absorption spectra measurement.
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Standard washing equipment
SW-12AII
Wenzhou Darong Textile Instrument Co., Ltd., China
Used for washing durability evaluation.
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Electronic single fiber tensile strength tester
LLY-06E
Laizhou Electron Instrument Co. Ltd. China
Used for mechanical properties evaluation.
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