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A kind of preparation method of oxygen-barrier photoinitiated hydrogel composite film
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A composite membrane and hydrogel technology, applied in the field of membrane science, to achieve the effect of simplifying the membrane-making device and the membrane-making process
Active Publication Date: 2019-06-07
DALIAN UNIV OF TECH
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Problems solved by technology
By introducing a new membrane-making method, three major problems in the preparation process of hydrogel composite membranes are solved
Method used
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Embodiment 1
[0021] Prepare hydrogel composite film prepolymer, polyethylene glycol diacrylate: N-isopropylacrylamide = 5:1 molar ratio, add 2% mass fraction of photoinitiator Irgacure 2959, magnetically stir until the dissolution is complete , Get the prepolymer of the coating film. Among them, the molecular weight of polyethylene glycol in polyethylene glycol diacrylate is 400.
[0022] Select base film material and size: select an area of 10×10cm 2 The PP flat film is the base film.
[0023] Place the cleaned glass plate flat on the table top, take 2ml of the prepolymer configured with a dropper, and drop it evenly on the surface of the glass plate.
[0024] Cover the cut base film on the prepolymer, use a roller to roll back and forth on the surface of the base film, so that the prepolymer between the glass plate and the base film can be spread evenly and evenly. At this time, the whole formed by the three has reached the gap. Oxygen conditions.
[0025] Put the glass plate, the prepolymer...
Embodiment 2
[0028] Prepare hydrogel composite film prepolymer, polyethylene glycol (200) diacrylate: N-isopropylacrylamide = 10:1 molar ratio, add 2% mass fraction of photoinitiator Irgacure 2959, magnetic stirring Until the dissolution is complete, a coating film prepolymer is obtained. Among them, the molecular weight of polyethylene glycol in polyethylene glycol diacrylate is 200.
[0029] Select base film material and size: select an area of 10×10cm 2 The PP flat film is the base film.
[0030] Place the cleaned glass plate flat on the table top, take 2ml of the prepolymer configured with a dropper, and drop it evenly on the surface of the glass plate.
[0031] Cover the cut base film on the prepolymer, use a roller to roll back and forth on the surface of the base film, so that the prepolymer between the glass plate and the base film can be spread evenly and evenly. At this time, the whole formed by the three has reached the gap. Oxygen conditions.
[0032] Put the glass plate, the prepo...
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Abstract
The invention discloses a preparation method of a novel oxygen-isolating photo-initialized hydrogel compound membrane and belongs to the field of membrane science and technology. The preparation method comprises the following steps: preparing a coating prepolymer of a compound membrane from polyethylene glycol diacrylate, N-isopropylacrylamide and a photo-initiator; and selecting a base membrane material and dimension and pre-treating the base membrane material. The flexible hydrogel compound membrane with a 3D network structure is prepared by means of the preparation method. The preparation method of the novel oxygen-isolating photo-initialized hydrogel compound membrane disclosed by the invention not only solves the problem of uniformly paving a surface functional layer of the compound membrane, but also provides an oxygen-isolating condition to promote a crosslinking reaction. In addition, the novel membrane making method is controllable in thickness of a compound layer, so that the interfacial soundness of the compound membrane is further increased. Moreover, the compound membrane is simple in preparation method and low in cost, and provides a novel concept to synthesize the compound membrane in the future.
Description
Technical field [0001] The invention belongs to the field of membrane science and technology, and relates to a method for preparing an oxygen-insulating light-initiated hydrogel composite membrane. Background technique [0002] The composite membrane is a separation membrane composed of a microporous membrane or an ultrafiltration membrane as a support layer, and a homogeneous membrane with a thickness of only 0.1 to 0.25 microns as a skin layer on its surface. In the field of membrane science, there are many methods for membrane preparation. For example, (1) the laminating method, first prepare a thin dense homogeneous membrane, and then laminate it on a microporous support layer. (2) Dip coating method, the polymer solution is dip-coated on the microporous membrane and then dried. Alternatively, the reactive monomer or prepolymer solution can be dip-coated on the microporous membrane and cured by heat or radiation. (3) The plasma vapor deposition method uses plasma glow to pro...
Claims
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Application Information
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