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Polydopamine/titanium dioxide double-layer composite film and preparation method thereof

A polydopamine film, titanium dioxide technology, applied in chemical instruments and methods, organic compound/hydride/coordination complex catalysts, physical/chemical process catalysts, etc., can solve the problem of uneven film thickness, limited application, and particles that cannot be exposed and other problems, to achieve the effect of improving hydrophilicity, good biocompatibility, and improving binding force

Active Publication Date: 2016-08-10
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of thin film TiO 2 Particle film thickness is not uniform, some TiO 2 The particle surface is also covered with a dopamine layer, making TiO 2 Particles cannot be exposed, thus inhibiting the TiO 2 The performance that should be exerted limits its application in the field of thin films

Method used

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  • Polydopamine/titanium dioxide double-layer composite film and preparation method thereof
  • Polydopamine/titanium dioxide double-layer composite film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] (1) Add 0.08mg of dopamine hydrochloride into 40ml of deionized water, stir until completely dissolved, and obtain A solution;

[0018] (2) Take out 5ml of A solution, put TiO 2 The hydrosol and the A solution are mixed at a volume ratio of 1:1, and fully stirred and mixed evenly to obtain the B solution;

[0019] (3) Add the clean PS substrate to the remaining A solution, take it out after soaking for 10 hours, and dry it at 50°C to obtain a PDA film on the PS substrate;

[0020] (4) Add 20ul B solution dropwise on the PDA film in step 3), spin-coat at 6000r / min for 30s, and dry at 50°C for 10h to obtain PDA / TiO 2 Double layer composite film.

[0021] The surface morphology of the composite film prepared in this example is shown in figure 2 , TiO in thin films 2 The nanoparticles are uniformly dispersed, and after 20 minutes of UV365 irradiation, the contact angle of the titanium dioxide particle film on the surface is changed from 35 。 down to 5 。 . The double...

Embodiment 2

[0023] (1) Add 0.09mg of dopamine hydrochloride into 50ml of deionized water, stir until completely dissolved, and obtain A solution;

[0024] (2) Take out 6ml of A solution, put TiO 2 The hydrosol and the A solution are mixed at a volume ratio of 1:3, and fully stirred and mixed evenly to obtain the B solution;

[0025] (3) Add the clean PP substrate to the remaining A solution, take it out after soaking for 10 hours, and dry it at 52°C to obtain a PDA film on the PP substrate;

[0026] (4) Add 22ul B solution dropwise on the PDA film in step 3), spin-coat at 6000r / min for 32s, and dry at 52°C for 10h to obtain PDA / TiO 2 Double layer composite film.

[0027] After the composite film prepared in this example was irradiated with UV365 for 20 minutes, the contact angle of the titanium dioxide particle film on its surface was changed from 45 to 45 。 down to 10 。 . The double-layer composite film is firmly combined with the PP substrate, and the titanium dioxide particle film...

Embodiment 3

[0029] (1) Add 0.10mg of dopamine hydrochloride into 60ml of deionized water, stir until completely dissolved, and obtain A solution;

[0030] (2) Take out 7ml of A solution, put TiO 2 Mix the hydrosol and the A solution at a volume ratio of 1:5, and stir and mix well to obtain the B solution;

[0031] (3) Add the clean quartz substrate to the remaining solution A, soak it for 11 hours, take it out, and dry it at 54°C to obtain a PDA film on the quartz substrate;

[0032] (4) Add 24ul B solution dropwise on the PDA film in step 3, spin-coat at 7000r / min for 34s, and dry at 54°C for 11h to prepare PDA / TiO with high bonding strength 2 Double layer composite film.

[0033] After the composite film prepared in this example was irradiated with UV365 for 20 minutes, the contact angle of the titanium dioxide particle film on its surface was changed from 55 to 55 。 reduced to 20 。 . The double-layer composite film is firmly combined with the quartz substrate, and the titanium dio...

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Abstract

The invention discloses a preparation method of a polydopamine / titanium dioxide double-layer composite film. The method includes the steps of: 1) adding dopamine hydrochloride into deionized water to obtain a solution A; 2) mixing TiO2 hydrosol with part of the solution A to obtain a solution B; 3) adding a clean substrate into the remaining solution A to perform soaking so as to obtain a polydopamine film on the substrate; and 4) conducting spin-coating of the solution B on the polydopamine film, and performing drying. The preparation method provided by the invention has the characteristics of low cost, simple process, and easy realization, the prepared polydopamine / titanium dioxide double-layer composite film has good biocompatibility, and the TiO2 nanoparticles in the film are dispersed evenly. The polydopamine / titanium dioxide double-layer composite film has strong binding force with the substrate and has certain photo-responsiveness, and can be applied to the fields of biological tissue engineering, photocatalyts and other fields.

Description

technical field [0001] The invention relates to a double-layer composite film and a preparation method thereof, in particular to a polydopamine (PDA) / titanium dioxide (TiO 2 ) double-layer composite film and its preparation method. Background technique [0002] TiO 2 It is an inorganic material with good biocompatibility, non-toxicity, chemical stability, etc., and it can achieve superhydrophilicity after ultraviolet light irradiation, and has extremely strong photocatalytic activity. Today TiO 2 Materials are widely used in biological tissue engineering, solar cells, self-cleaning and other fields [Marco Faustini. et al. Hydrophobic, Antireflective, Self-Cleaning, and Antifogging Sol-Gel Coatings: An Example of Multifunctional Nanostructured Materials for Photovoltaic Cells. Chem. Mater. 2010, 22, 4406-4413], [Kui Cheng, Yu Sun. et al. Improved light-induced cell detachment on rutile TiO 2 nanodot films. Acta Biomaterialia. 26(2015) 347-354]. [0003] Dopamine is non-...

Claims

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Application Information

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IPC IPC(8): B01J31/38B01J35/02
CPCB01J21/063B01J31/06B01J31/38B01J35/59
Inventor 程逵成智国翁文剑
Owner ZHEJIANG UNIV
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