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Hybrid film containing titanium dioxide/poly-dopamine functional particles and preparation method of hybrid film

A technology of functional particles and titanium dioxide, which is applied in the field of hybrid membranes containing titanium dioxide/polydopamine functional particles and their preparation, can solve the problems of reduced permeability of membrane composite membranes, blocked pores on membrane surfaces, etc., and achieves high hydrophilicity and conditions. The effect of mild, good anti-pollution properties

Active Publication Date: 2016-12-14
XIAMEN UNIV OF TECH
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Problems solved by technology

However, the polydopamine layer will cause blockage of the membrane surface pore size, reducing the permeability of the membrane composite membrane.

Method used

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  • Hybrid film containing titanium dioxide/poly-dopamine functional particles and preparation method of hybrid film
  • Hybrid film containing titanium dioxide/poly-dopamine functional particles and preparation method of hybrid film

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Embodiment 1

[0024] First, 0.025g of PDA was uniformly dispersed in 100mL of deionized water, 0.35mL of titanium trichloride was added, stirred and reacted for 1 hour, then heated to 90°C for 4 hours, centrifuged, washed and dried to obtain TiO 2 / PDA functional particles.

[0025] Then, 1 g of polysulfone was dissolved in 6.8 mL of N-methylpyrrolidone (NMP), and 0.008 g of TiO 2 / PDA functional particles are dispersed in the solution, stirred, and subjected to ultrasonic treatment to obtain a uniform casting solution; after the prepared casting solution is left to defoam, it is directly coated on a clean glass plate with a glass rod; The glass plate was placed horizontally and immersed in a water bath at 30°C. The prepared film was washed with a large amount of water to remove the residual solvent in the film, and stored in water.

[0026] from figure 1 It can be seen that the PDA particles are small balls with a diameter of about 250nm, and the TiO 2 The particles are densely coated o...

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Abstract

The invention provides a hybrid film containing titanium dioxide / poly-dopamine functional particles. The hybrid film comprises a film substrate and the titanium dioxide / poly-dopamine functional particles doped in the film matrix, wherein each titanium dioxide / poly-dopamine functional particle adopts a core-shell structure taking a poly-dopamine particle as a core and a titanium dioxide nano-particle layer as a shell. The invention further provides a preparation method of the hybrid film. The preparation method comprises the following steps: first, preparing the titanium dioxide / poly-dopamine functional particles, doping the titanium dioxide / poly-dopamine functional particles into a polymer matrix, and preparing the hybrid film according to a phase inversion process. The titanium dioxide / poly-dopamine functional particles provided by the invention have high photocatalytic activity; poly-dopamine can perform chelating interaction with titanium dioxide, and can serve a free radical quencher to effectively protect the polymer matrix during a UV illumination process; the functional particles are stable in overall structure and have high hydrophilicity. The prepared hybrid film has good separation performance, self-cleaning property and property stability.

Description

technical field [0001] The invention belongs to the field of membrane technology, and in particular relates to a hybrid membrane containing titanium dioxide / polydopamine functional particles and a preparation method thereof. Background technique [0002] Due to its advantages of high efficiency, energy saving, and environmental protection, membrane technology has been widely used in many fields, such as water treatment, pharmaceuticals, and biochemistry. In actual long-term production and use, the membrane will inevitably be polluted. The decline of membrane flux and separation performance caused by membrane fouling is one of the most serious problems faced by membrane technology. Therefore, how to reduce membrane fouling, maintain the stability of membrane performance and prolong the service life of membrane has become a research hotspot. Using inorganic nanoparticles to modify polymer membranes, the resulting hybrid membranes can often have both the advantages of organic...

Claims

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Application Information

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IPC IPC(8): B01D71/60B01D67/00
CPCB01D67/0079B01D71/60B01D2325/36
Inventor 吴慧青毛龙刘跃军
Owner XIAMEN UNIV OF TECH
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