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A kind of cellulose acetate graft copolymer ordered porous membrane material and preparation method thereof

A technology of cellulose acetate and graft copolymer, which is applied in the field of cellulose acetate graft copolymer ordered porous membrane materials, can solve the problems of hindering the application of cellulose materials, difficult to obtain cellulose-based films, etc., and achieves simplicity and efficiency The effect of preparation

Active Publication Date: 2020-06-09
HUNAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is difficult to obtain a cellulose-based film with an ordered pore structure by using a simple cellulose structure and a simple method, which greatly hinders the application of cellulose materials in the field of films.

Method used

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  • A kind of cellulose acetate graft copolymer ordered porous membrane material and preparation method thereof
  • A kind of cellulose acetate graft copolymer ordered porous membrane material and preparation method thereof
  • A kind of cellulose acetate graft copolymer ordered porous membrane material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0022] (1) Preparation of cellulose acetate grafted polymethyl methacrylate copolymer

[0023] a. Weigh 2 grams of cellulose acetate, add it to a mixed solution of 25 milliliters of tetrahydrofuran and 0.4 grams of pyridine, stir at room temperature until completely dissolved; then prepare 3 milliliters of a tetrahydrofuran solution of 800 milligrams of bromoisobutyryl bromide, and slowly Add it dropwise into the tetrahydrofuran solution of cellulose acetate; after dropping, stir and react at room temperature for 48 hours, the reaction mixture is precipitated, filtered, and dried to obtain bromoisobutyrylated cellulose acetate.

[0024] b. Weigh 200 mg of bromoisobutyrylated cellulose acetate, add it to toluene, stir at room temperature until completely dissolved,

[0025] Add methyl methacrylate, cuprous bromide and ligand in sequence, react at 60 degrees Celsius for 12 hours, concentrate the reaction mixture, precipitate and dry to obtain cellulose acetate grafted polymeth...

Embodiment 2

[0029] (1) Preparation of cellulose acetate grafted styrene copolymer

[0030] a. Weigh 2 grams of cellulose acetate, add it to a mixed solution of 25 milliliters of tetrahydrofuran and 0.4 grams of pyridine, stir at room temperature until completely dissolved; then prepare 3 milliliters of a tetrahydrofuran solution of 1.6 grams of bromoisobutyryl bromide, and slowly Add it dropwise into the tetrahydrofuran solution of cellulose acetate; after dropping, stir and react at room temperature for 48 hours, the reaction mixture is precipitated, filtered, and dried to obtain bromoisobutyrylated cellulose acetate.

[0031] b. Weigh 200 mg of bromoisobutyrylated cellulose acetate, add it to toluene, stir at room temperature until completely dissolved,

[0032] Styrene, cuprous bromide and ligands were added in sequence, reacted at 100 degrees centigrade for 12 hours, the reaction mixture was concentrated, precipitated and dried to obtain a cellulose acetate grafted polystyrene copol...

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Abstract

The invention relates to an ordered porous cellulose acetate grafted copolymer membrane material and a preparation method thereof. The material is a cellulose acetate grafted polystyrene copolymer ora cellulose acetate grafted polymethyl methacrylate copolymer, can efficiently and simply form an ordered porous structure under a high humidity condition, and has the characteristic of easily formingan ordered porous membrane. The ordered porous cellulose acetate grafted copolymer membrane material has the characteristics of richness in sources, simplicity in production of the porous membrane, and high ordered degree of the porous membrane, and can meet the needs of application in different fields.

Description

technical field [0001] The invention relates to an ordered porous membrane material of cellulose acetate graft copolymer. Background technique [0002] Polymer thin films with micro-nano structures have very important application value in biomaterials, optoelectronic materials, etc., and thus have been widely studied and applied. In the past, different template methods can be used to prepare thin films with micro-nano structures, such as templates such as colloidal crystals, emulsion droplets, biological bacteria, and filter membranes. It is difficult to obtain thin films with tunable size or monodisperse structure. In recent years, Widawski G. Rawiso M. and Francois B. reported a new method for preparing thin films with microstructure under high humidity conditions [Self-Organized Honeycomb Morphology of Star-Polymer Polystyrene Films. Nature 369, 387~389(1994) 】has been gradually developed, and because of its simplicity and controllability, it has attracted more and more...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F251/02C08F220/14C08F212/08C08J5/18C08J9/28C08L51/02
CPCC08F251/02C08J5/18C08J9/28C08J2201/0502C08J2351/02C08F220/14C08F212/08
Inventor 刘文勇钟环宇周志涵王志杰杨明明刘家豪王启起邹斌廖文琦
Owner HUNAN UNIV OF TECH