Method for preparing titanium dioxide nano-film on surface of expanded polytetrafluoroethylene

The technology of polytetrafluoroethylene and polytetrafluoroethylene plate is applied in the field of preparing titanium dioxide nano-film on the surface of expanded polytetrafluoroethylene, which can solve the problems of complicated operation process, high cost, weak bonding of tetrafluoroethylene plate, etc. To achieve the effect of simple preparation process, convenient operation, good biocompatibility and light responsiveness

CN106146873AInactive Publication Date: 2016-11-23ZHEJIANG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2016-11-23
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a method for preparing a titanium dioxide nano-film on the surface of expanded polytetrafluoroethylene. The method for preparing the titanium dioxide nano-film on the surface of expanded polytetrafluoroethylene comprises the following steps: treating a cleaned expanded polytetrafluoroethylene substrate in a plasma reactor; coating the expanded polytetrafluoroethylene substrate with a tetrabutyl titanate solution in a spinning manner; and then treating by using a hydrothermal method. The preparation method is simple in process, convenient to operate and easy to implement. TiO2 nanoparticles in the prepared film are uniform and compact, and are combined with the expanded polytetrafluoroethylene substrate quite firmly, the photosensitivity is high, and the titanium dioxide nano-film has huge potential application in the fields of photocatalysis, tissue engineering and the like.
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Description

technical field

[0001] The invention relates to a method for preparing a titanium dioxide nanometer film on the surface of an organic polymer, in particular to a method for preparing a photoresponsive titanium dioxide nanometer film on the surface of expanded polytetrafluoroethylene. Background technique

[0002] TiO 2 It is a non-toxic inorganic material with excellent chemical stability, strong photocatalytic activity and good biocompatibility. After a period of UV irradiation, TiO 2 The surface can be changed to a superhydrophilic state. It has been found that TiO 2 Materials are widely used in photocatalytic self-cleaning, biological tissue engineering and other fields [YoshiakiTaguchi. et al. Photo-induced properties of non-annealed anatase TiO 2 mesoporous film prepared by anodizing in the hot phosphate / glycerolelectrolyte. Chem. Applied Surface Science 258 (2012) 9810-9815], [K. Cheng,H. P. Wan. et al. RSC Adv., 2015, 5, 88965-88972].

[0003] Expanded polytetra...

Examples

Embodiment 1

[0017] (1) Soak the expanded polytetrafluoroethylene substrate in absolute ethanol, ultrasonically clean it for 20 minutes, then take out the substrate and dry it at 60°C, then soak it in 3mol / L NaOH solution for 10 hours, and dry it naturally;

[0018] (2) Introduce oxygen into the plasma reactor, place the cleaned and dried expanded polytetrafluoroethylene substrate at a position 10cm away from the plasma discharge area, and treat it for 10s;

[0019] (3) Mix tetrabutyl titanate and absolute ethanol at a volume ratio of 1:1 and stir evenly to obtain A solution;

[0020] (4) On the expanded polytetrafluoroethylene substrate treated in step 2), 20ul of solution A was added dropwise, spin-coated at a speed of 7000r / min for 30s, and dried at 60°C to obtain a tetrabutyl titanate film;

[0021] (5) The tetrabutyl titanate film prepared in step 4) was immersed in a hydrothermal tank filled with deionized water, and hydrothermally treated at 140°C for 2 hours to obtain a titanium di...

Embodiment 2

[0024] (1) Soak the expanded polytetrafluoroethylene substrate in absolute ethanol, ultrasonically clean it for 20 minutes, then take out the substrate and dry it at 60°C, then soak it in 1mol / L NaOH solution for 8 hours, and let it dry naturally;

[0025] (2) Introduce oxygen into the plasma reactor, place the cleaned and dried expanded polytetrafluoroethylene substrate at a position 15cm away from the plasma discharge area, and treat it for 20s;

[0026] (3) Mix tetrabutyl titanate and absolute ethanol at a volume ratio of 1:2 and stir evenly to obtain A solution;

[0027] (4) On the expanded polytetrafluoroethylene substrate treated in step 2), 22ul of solution A was added dropwise, spin-coated at a speed of 7000r / min for 32s, and dried at 60°C to obtain a tetrabutyl titanate film;

[0028] (5) The tetrabutyl titanate film prepared in step 4) was immersed in a hydrothermal tank filled with deionized water, and hydrothermally treated at 140°C for 2 hours to obtain a titanium...

Embodiment 3

[0031] (1) Soak the expanded polytetrafluoroethylene substrate in absolute ethanol, ultrasonically clean it for 20 minutes, then take out the substrate and dry it at 60°C, then soak it in 3mol / L NaOH solution for 10 hours, and dry it naturally;

[0032] (2) Introduce oxygen into the plasma reactor, place the cleaned and dried expanded polytetrafluoroethylene substrate at a position 20cm away from the plasma discharge area, and treat it for 30s;

[0033] (3) Mix tetrabutyl titanate and absolute ethanol at a volume ratio of 1:3 and stir evenly to obtain A solution;

[0034] (4) On the expanded polytetrafluoroethylene substrate treated in step 2), 24ul of solution A was added dropwise, spin-coated at a speed of 7000r / min for 34s, and dried at 60°C to obtain a tetrabutyl titanate film;

[0035] (5) The tetrabutyl titanate film prepared in step 4) was immersed in a hydrothermal tank filled with deionized water, and hydrothermally treated at 140°C for 3 hours to obtain a titanium di...