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A kind of porous polymer film with controllable nanometer size and its preparation method

A porous polymer and nano-sized technology, which is applied in the field of porous film materials, can solve the problems of difficult control of parameters, large-scale equipment, complex process of nano-sized uniform porous film, etc., and achieve the effect of simple process

Active Publication Date: 2020-10-16
SHANGHAI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The nanometer-sized uniform porous film prepared by the above preparation method has defects such as complex process, many parameters are difficult to control, or large-scale equipment is required.

Method used

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  • A kind of porous polymer film with controllable nanometer size and its preparation method
  • A kind of porous polymer film with controllable nanometer size and its preparation method
  • A kind of porous polymer film with controllable nanometer size and its preparation method

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preparation example Construction

[0027] The invention provides a method for preparing a porous polymer film with controllable nanometer size, comprising the following steps:

[0028] dissolving the polymer in an organic solvent to obtain a polymer solution;

[0029] drip-coating the polymer solution onto a glass substrate in an environment with a relative humidity of 45% to 90%, to obtain a polymer liquid film;

[0030] Adjusting the temperature of the glass substrate and keeping the temperature constant for 20 to 60 seconds, a porous polymer film with controllable nanometer size is obtained,

[0031] The temperature range of the glass substrate is adjusted to be 3° C. to 28° C.

[0032] In the invention, the polymer is dissolved in an organic solvent to obtain a polymer solution. In the present invention, the mass ratio of the polymer to the organic solvent is preferably 0.01˜0.04:1, more preferably 0.01:1. In the present invention, the organic solvent preferably includes one or more of chloroform, dichlo...

Embodiment 1

[0047] Polystyrene (Mn=208,000 g / mol) with a mass ratio of 0.01:1 was dissolved in chloroform solvent to obtain a polystyrene solution. At 13°C, adjust the relative humidity in the airtight box to 85%, and keep the humidity constant.

[0048] Drop-coat 40 μL of polystyrene solution onto a clean glass slide and let it stand at room temperature (13°C) for 10s, 20s, 30s, and 40s respectively, then immediately increase the current of the constant current power supply at a heating rate of 5°C / s The temperature of the glass substrate was raised to 25°C, and the temperature was kept constant for 60s until the film was dried to obtain porous polystyrene films with different nanopore diameters.

[0049] image 3 For the porous polystyrene film AFM figure that embodiment 1 prepares, from image 3 It can be seen that the average pore diameters of the porous polystyrene films prepared after standing at 13°C for 10s, 20s, 30s, and 40s are 100nm, 120nm, 200nm, and 320nm, and the average p...

Embodiment 2

[0051] Polystyrene (Mn=208,000 g / mol) with a mass ratio of 0.01:1 was dissolved in chloroform solvent to obtain a polystyrene solution. At 13°C, adjust the relative humidity in the airtight box to 85%, and keep the humidity constant.

[0052] 40 μL of polystyrene solution was drop-coated onto a clean glass slide, and porous polystyrene films with different pore sizes were obtained through four different substrate temperature control processes. The specific process was as follows:

[0053] For process A, the temperature of the glass substrate is maintained at 13°C for 20s, and the temperature of the glass substrate is raised to 25°C at a heating rate of 5°C / s, and kept at a constant temperature for 40s to obtain an average pore diameter of 120nm and an average pore depth of 27nm. Dense porous polystyrene film with 60% porosity.

[0054] For process B, lower the temperature of the glass substrate from 13°C to 7°C and keep the temperature constant for 20s, raise the temperature ...

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Abstract

The invention provides a nano-scale controllable porous polymer film, belonging to the technical field of porous film materials. The nano-scale controllable porous polymer film is prepared by the steps of dissolving a polymer into an organic solvent to obtain a polymer solution, coating a glass substrate with the polymer solution in a dripping manner in an environment with the relative humidity of45%-90% so as to obtain a polymer liquid film, and adjusting the temperature of the glass substrate in a temperature range of 3-28 DEG C, so as to obtain the nano-scale controllable porous polymer film. By adjusting the temperature of the glass substrate and the environmental temperature, the agglomeration process of water vapor on the surface of the liquid film and the water drop growth processare commonly controlled, and the nano-scale controllable porous polymer film is prepared, so that the technical problems that the bore diameter, hole depth and porosity of the porous polymer film aredifficult to control are solved. According to a preparation process provided by the invention, the industrial production can be realized.

Description

technical field [0001] The invention relates to the technical field of porous film materials, in particular to a porous polymer film with controllable nanometer size and a preparation method thereof. Background technique [0002] The ordered porous structure film can be used in biomolecular microarrays, pattern templates, super-hydrophobic surfaces, sensing and optoelectronic materials, micro-containers or reactors and other fields. In particular, honeycomb porous structure films have been widely used in the field of biostimulatory materials, mainly for regulating cell responses or as scaffolds for cell growth. [0003] Porous structure film materials have physical and chemical properties such as large specific surface area, high permeability, good thermodynamic stability, strong molecular adsorption capacity, good assembleability and film-forming properties, and have been widely used in various aspects of experiment, production and life. . The pore diameter, pore depth an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J5/18C08J9/00C08L25/06
CPCC08J5/18C08J9/00C08J2325/06
Inventor 郑燕琼余俊乐唐杰王超魏斌
Owner SHANGHAI UNIV
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