Method for preparing polystyrene organic porous material with adjustable and controllable pore structure

A polystyrene and porous material technology, applied in the field of polymer materials, can solve problems such as time-consuming and laborious, and achieve the effects of broad application prospects, convenient operation, and simple and easy pore size.

Inactive Publication Date: 2014-05-07
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method is relatively time-consuming

Method used

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  • Method for preparing polystyrene organic porous material with adjustable and controllable pore structure
  • Method for preparing polystyrene organic porous material with adjustable and controllable pore structure
  • Method for preparing polystyrene organic porous material with adjustable and controllable pore structure

Examples

Experimental program
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Effect test

Embodiment 1

[0024] Weigh the star-shaped copolymers A and B composed of polystyrene and polylactic acid in a ratio of 10:90, and then dissolve them uniformly with dichloromethane, and remove the organic solvent under reduced pressure; after microphase separation and macroscopic orientation at high temperature, hydrogen The polylactic acid phase was selectively etched away in an aqueous solution of sodium oxide to obtain a polystyrene organic porous material with an adjustable pore structure. The porous polystyrene block material has a pore diameter of 12.6 nm and a porosity of 119%.

Embodiment 2

[0026] Weigh the star-shaped copolymers A and B composed of polystyrene and polylactic acid in a ratio of 30:70, and then dissolve them uniformly with dichloromethane, and remove the organic solvent under reduced pressure; The polylactic acid phase was selectively etched away in an aqueous solution of sodium oxide to obtain a polystyrene organic porous material with an adjustable pore structure. The pore diameter of the porous polystyrene block material is 13.5 nm, and the porosity is 105%.

Embodiment 3

[0028] Weigh the star-shaped copolymers A and B composed of polystyrene and polylactic acid in a ratio of 50:50, and then dissolve them uniformly with dichloromethane, and remove the organic solvent under reduced pressure; after microphase separation and macroscopic orientation at high temperature, hydrogen The polylactic acid phase was selectively etched away in an aqueous solution of sodium oxide to obtain a polystyrene organic porous material with an adjustable pore structure. The porous polystyrene block material has a pore diameter of 14.7 nm and a porosity of 93%.

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Abstract

The invention belongs to the technical field of macromolecular materials and particularly relates to a method for preparing a polystyrene organic porous material with an adjustable and controllable pore structure. The method comprises the specific steps of weighing a star-shaped copolymer A with two polystyrene chains and a polylactic acid chain and a star-shaped copolymer B with four polystyrene chains and a polylactic acid chain according to a required ratio, dissolving the star-shaped copolymer A and the star-shaped copolymer B into a solvent, uniformly mixing, drying, then, self-assembling at a temperature above the glass-transition temperature of the copolymers, so as to form micro-phase separation, carrying out hot-pressing macro-orientation, and then, selectively etching in an alkaline solution so as to remove an orientation-aligned polylactic acid phase, thereby obtaining the polystyrene organic porous material with the adjustable and controllable pore structure. According to the method, through blending, the pore size of a porous polystyrene block material can be conveniently adjusted and controlled while the material can keep high porosity, so that the parameters, such as specific surface area, pore volume and the like, of the material can be adjusted and controlled accurately.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a preparation method of a polystyrene organic porous material with an adjustable pore structure. Background technique [0002] As an organic polymer material with a regular two-dimensional nanoporous structure, nanoporous polymer materials usually have a pore size between 10 and 50 nanometers, have high heat resistance and mechanical properties, and have a certain porosity and ratio. Surface area and other characteristics make it the next generation of new nano-organic materials. Such materials have shown certain application potential in nanoscience and have been used by researchers so far. [0003] At present, for the preparation of metal nanoparticles and metal nanowires, nanoporous polymer materials are widely used. Selecting a porous polymer material with an appropriate pore size according to specific requirements can not only control the cross-section...

Claims

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Application Information

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IPC IPC(8): C08L25/06C08J9/26
Inventor 宋杰李建波任杰
Owner TONGJI UNIV
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