Super-hydrophobic electrostatic spinning polydimethylsiloxane membrane and preparation method and application thereof

A technology of dimethylsiloxane film and electrospinning, which is applied in the field of preparation of superhydrophobic electrospinning polydimethylsiloxane film, can solve the problems of low hydrophobicity and uncontrollable pore size, and achieve anti-wetting The effect of high wettability, controllable membrane pore size, and simple preparation method

Inactive Publication Date: 2017-01-18
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the defects of low hydrophobicity and uncontrollable pore size of existing membranes for membrane distillation and the blank of electrospun polydimethylsiloxane membranes in membrane distillation applications, the technical p...

Method used

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  • Super-hydrophobic electrostatic spinning polydimethylsiloxane membrane and preparation method and application thereof
  • Super-hydrophobic electrostatic spinning polydimethylsiloxane membrane and preparation method and application thereof
  • Super-hydrophobic electrostatic spinning polydimethylsiloxane membrane and preparation method and application thereof

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Experimental program
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Embodiment 1

[0034] This embodiment provides a method for preparing a superhydrophobic electrospun polydimethylsiloxane membrane suitable for a membrane distillation process, comprising the following steps:

[0035] (1) Preparation of electrospinning base solution: Dissolve PMMA in a mixed solvent of N,N-dimethylformamide (DMF) and tetrahydrofuran (THF) with a mass ratio of 1:1, and stir at 50°C for 2h; Wherein the mass percent of PMMA in the mixed solvent of N,N-dimethylformamide (DMF) and tetrahydrofuran (THF) is 10wt.%;

[0036] (2) Preparation of electrospinning solution: add PDMS of corresponding quality to the above-mentioned electrospinning base liquid, so that the mass percentage of PDMS in the electrospinning base liquid is 10wt.%, stir at 25°C for 0.5h, and then Stand at 25°C for 0.5h to obtain the electrospinning solution;

[0037](3) Set the electrospinning parameters, and electrospin the electrospinning solution to form a film to obtain an electrospun polydimethylsiloxane fil...

Embodiment 2

[0042] This embodiment provides a method for preparing a superhydrophobic electrospun polydimethylsiloxane membrane suitable for a membrane distillation process, comprising the following steps:

[0043] (1) Preparation of electrospinning base solution: Dissolve PMMA in a mixed solvent of N,N-dimethylformamide (DMF) and tetrahydrofuran (THF) with a mass ratio of 1:1, and stir at 50°C for 2h; Wherein the mass percent of PMMA in the mixed solvent of N,N-dimethylformamide (DMF) and tetrahydrofuran (THF) is 15wt.%;

[0044] (2) Prepare electrospinning solution: add PDMS of corresponding quality in PMMA electrospinning base liquid, make the mass percent of PDMS in electrospinning base liquid be 15wt.%, stir 0.5h at 50 ℃, then in Stand at 50°C for 0.5h to obtain the electrospinning solution;

[0045] (3) Set the electrospinning parameters, and electrospin the electrospinning solution to form a film to obtain an electrospun polydimethylsiloxane film, wherein the electrospinning param...

Embodiment 3

[0050] This embodiment provides a method for preparing a superhydrophobic electrospun polydimethylsiloxane membrane suitable for a membrane distillation process, comprising the following steps:

[0051] (1) Preparation of electrospinning base solution: dissolve TPU in a mixed solvent of N,N-dimethylformamide (DMF) and tetrahydrofuran (THF) with a mass ratio of 1:1, and stir at 70°C for 2h; Wherein the mass percent of TPU in the mixed solvent of N,N-dimethylformamide (DMF) and tetrahydrofuran (THF) is 10wt.%;

[0052] (2) Preparation of electrospinning solution: add PDMS of corresponding quality to the above-mentioned electrospinning base liquid, so that the mass percentage of PDMS in the electrospinning base liquid is 10wt.%, stir at 25°C for 0.5h, and then Stand at 25°C for 0.5h to obtain the electrospinning solution;

[0053] (3) Set the electrospinning parameters, and electrospin the electrospinning solution to form a film to obtain an electrospun polydimethylsiloxane film...

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Abstract

The invention discloses a preparation method of a super-hydrophobic electrostatic spinning polydimethylsiloxane membrane. The preparation method comprises the steps that a substrate organic polymer material is dissolved in an organic solvent, and an electrostatic spinning base solution is prepared through high-temperature stirring; the functional organic polymer material and nano particulate matter are dissolved in the electrostatic spinning base solution prepared in the step 1, and an electrostatic spinning solution is prepared through high-temperature stirring and high-temperature standing; the parameters of an electrostatic spinning correlated instrument and environmental parameters are set, electrostatic spinning membrane forming is performed by using the electrostatic spinning solution to obtain the electrostatic spinning polydimethylsiloxane membrane; the electrostatic spinning polydimethylsiloxane membrane is subjected to heat treatment and standing cooling. The invention further provides the super-hydrophobic electrostatic spinning polydimethylsiloxane membrane and application of the super-hydrophobic electrostatic spinning polydimethylsiloxane membrane in a membrane distillation process. The preparation method is simple, a preparation process is easy to control, the preparation cost is low, the preparation time is shorter, the water contact angle of the membrane is large, and the membrane can be directly applied to the membrane distillation process and is high in flux and long in service life.

Description

technical field [0001] The invention relates to the fields of membrane preparation and water treatment, in particular to a preparation method of a superhydrophobic electrospun polydimethylsiloxane membrane and its application in a membrane distillation process. Background technique [0002] Membrane distillation (MD) is a new membrane separation technology developed in recent years. The process is a membrane process in which the volatile components in the mixed liquid are driven by the vapor pressure difference on both sides of the porous hydrophobic membrane to achieve mass transfer and separation. Membrane distillation process has the advantages of simple required equipment, easy operation, high retention rate of target components, low operating temperature, can be operated under normal pressure, can use low-grade heat sources (solar, geothermal, waste heat, etc.), and can handle high-concentration aqueous solutions Therefore, it can be widely used in seawater desalinatio...

Claims

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Application Information

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IPC IPC(8): B01D71/70B01D69/02C02F1/44
CPCY02W10/37B01D71/70B01D69/02B01D2323/35B01D2323/39B01D2325/02B01D2325/04B01D2325/38C02F1/447
Inventor 邵嘉慧任龙飞夏凡
Owner SHANGHAI JIAO TONG UNIV
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