Preparation method of polymer/graphene nano composite membrane

A nanocomposite and graphene technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve the problems of microbial and extracellular polymer contamination, difficulty in large-scale application, poor hydrophilicity, etc., and achieve irreversibility Reduced pollution level, improved hydrophilicity, and good hydrophilicity

Active Publication Date: 2014-03-05
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the existing polymer membrane materials have poor hydrophilicity, are easy to pollute, and are particularly easy to be polluted by microorganisms and extracellular polymers, resulting in difficulties in large-scale application, and provide a polymer / graphite Preparation method of ene nanocomposite film

Method used

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  • Preparation method of polymer/graphene nano composite membrane
  • Preparation method of polymer/graphene nano composite membrane
  • Preparation method of polymer/graphene nano composite membrane

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specific Embodiment approach 1

[0014] Specific embodiment one: the preparation method of a kind of polymer / graphene nanocomposite film of this embodiment is realized by following steps:

[0015] 1. Take 0.01-30 parts of graphene nanomaterials, 5-40 parts of polymers, 30-90 parts of organic solvents, 1-50 parts of organic additives, and 0.1-30 parts of inorganic additives in parts by mass;

[0016] 2. Add the graphene nanomaterial weighed in step 1 into an organic solvent for ultrasonic dispersion, wherein the ultrasonic dispersion power is 50w to 1000w, and the ultrasonic dispersion time is 0.1h to 10h to obtain a graphene nanomaterial suspension;

[0017] 3. Add the polymer, organic additives and inorganic additives weighed in step 1 to the graphene nanomaterial suspension obtained in step 2. After sealing, heat to 20°C-90°C and stir for 2h-48h, then stand still for degassing 1h~96h, get the casting solution;

[0018] 4. The casting solution prepared in step 3 is made into a coagulation bath medium with a...

specific Embodiment approach 2

[0022] Specific embodiment two: the difference between this embodiment and specific embodiment one is that the graphene nanomaterial is a mixture of one or more of graphene, graphene oxide and modified graphene in any ratio; Among them, the modified materials of modified graphene are polyethylene glycol, polymethyl methacrylate, polyacrylamide, polyvinyl alcohol, C5-C18 quaternary ammonium salt type cationic surfactant, anionic surfactant, nonionic surfactant, etc. Type surfactant, polystyrene, polyguiroxane, N-vinyl-pyrrolidone, 2-hydroxy-ethyl-methacrylic acid, N-vinyl caprolactam, chitosan, phosphorylcholine polymer, egg A mixture of one or more of phospholipids and 2-methacryloylethoxybutyl carbamate in any ratio. Others are the same as the first embodiment.

specific Embodiment approach 3

[0023] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is that the polymer is polyethylene, polypropylene, polyvinyl chloride, polyvinylidene fluoride, polysulfone, polyethersulfone, polyacrylonitrile , polyetherimide, cellulose acetate, aromatic polyamide, aromatic polyamide urea and sulfonated polyaryl ether sulfone or a mixture composed of any ratio. Others are the same as those in Embodiment 1 or 2.

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Abstract

The invention relates to a preparation method of a polymer / graphene nano composite membrane, and aims to solve the problem that the existing polymer membrane material can not be applied in a large scale because the existing polymer membrane material is poor in hydrophilic property, is polluted easily and particularly is polluted by microbes and extracellular polymer easily. The preparation method disclosed by the invention comprises the steps of 1, taking a graphene nano material, a polymer, an organic solvent, an organic additive and an inorganic additive in parts by weight; 2, preparing a graphene nano material suspension; 3, preparing a membrane casting solution; 4, preparing a membrane by using the membrane casting solution in a coagulation bath medium to obtain a coagulation membrane, and then soaking the coagulation membrane in deionized water. The nano composite membrane disclosed by the invention is good in hydrophilic property, the irreversible pollution level of the nano composite membrane is significantly reduced, the anti-pollution capacity of the polymer membrane is effectively improved, the water flux is improved, and the polymer / graphene nano composite membrane disclosed by the invention is applied to the field of chemical industry.

Description

technical field [0001] The invention relates to a preparation method of a polymer / graphene nanocomposite film. Background technique [0002] Water shortage and pollution have become an increasingly important issue in today's world. Because there is no need to add additional chemicals in the water treatment process, it has the advantages of small equipment footprint, no secondary pollution, and easy automation control. Membrane technology has become one of the most promising treatment technologies in the field of water treatment. Due to the strong hydrophobicity of traditional polymer membranes, it is easy to adsorb proteins during the long-term operation of water plants, especially microbial and extracellular polymer pollution, which reduces the membrane flux and service life, and increases the cost of operation and maintenance. The cost limits its further application in membrane water treatment technology. It has been unable to meet the requirements of large-scale industr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/06B01D69/12B01D67/00
Inventor 马军王海东
Owner HARBIN INST OF TECH
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