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P4VP-b-PMA (Az) block copolymer, high-through hexagonal prism membrane with adjustable prism diameter and preparation method of membrane

A technology of block copolymer and p4vp-b-pma, applied in the field of new polymer materials, can solve the problems of limited application, weak complexing force of transition metal ions, etc., and achieve the effect of strong metal complexing ability

Active Publication Date: 2016-08-24
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the complexation of PEO to small organic molecules, heavy metal ions, and transition metal ions is not strong, thus limiting its application in templates.

Method used

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  • P4VP-b-PMA (Az) block copolymer, high-through hexagonal prism membrane with adjustable prism diameter and preparation method of membrane
  • P4VP-b-PMA (Az) block copolymer, high-through hexagonal prism membrane with adjustable prism diameter and preparation method of membrane
  • P4VP-b-PMA (Az) block copolymer, high-through hexagonal prism membrane with adjustable prism diameter and preparation method of membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] P4VP 100 -b-PMA(Az) 60 The preparation method of block copolymer, comprises the steps:

[0057] 1) Synthesis of P4VP macroinitiator:

[0058] Into a clean Shrek bottle, add 10ml of isopropanol after dehydration, 100 times the molar equivalent of ethyl α-bromoisobutyrate, that is, 11ml, 150.4ul of ethyl α-bromoisobutyrate, 545.6 The ligand tris(2-dimethylaminoethyl)amine (Me 6 TREN), mix well. Then, the Shrek bottle was frozen in liquid nitrogen, 100 mg of cuprous chloride (CuCl) was added, and the top of the bottle was sealed with a rubber stopper. Wherein the feeding molar ratio is, initiator:ligand:CuCl=1:2:1. Then evacuate for 5 minutes under freezing, thaw and stir for 5 minutes under nitrogen, and cycle 3 times. Finally, tighten the high-vacuum shut-off valve of the Shrek bottle under the condition of freezing and evacuating, then thaw it and put it in an oil bath at 45°C to stir and react for 16 hours.

[0059] When the reaction time is up and the viscosity...

Embodiment 2

[0064] P4VP 16 -b-PMA(Az) 5 The preparation method of block copolymer, with embodiment 1, its difference only lies in:

[0065] In step 1), 1-chlorophenylethane (PE-Cl) is used as the initiator, and initiator:ligand:CuCl=1:2.5:1 (molar ratio). The dosages of each substance are: initiator 0.25g, ligand 1ml, CuCl 173.2mg, 4VP 2.5g, reaction solvent DMF 6mL. Finally, a P4VP with a block number of 16 is obtained 16 -Br macroinitiator 2.5g;

[0066] In step 2), with pentamethyldiethylenetriamine (PMDETA) as ligand, and macromolecular initiator: ligand: CuCl=1:3:1 (molar ratio), the consumption of each material is respectively: initiator 0.2g, ligand 0.062g, CuCl 0.011g; reaction solvent DMF 4mL, chlorobenzene 4ml.

Embodiment 3

[0068] P4VP 100 -b-PMA(Az) 12 The preparation method of block copolymer, with embodiment 1, its difference only lies in:

[0069] In step 1), methyl α-bromoisobutyrate is used as the initiator, and initiator:ligand:CuCl=1:3:1 (molar ratio). The dosage of each raw material is: initiator 0.3g, ligand 1.15g, CuCl 161mg, 4VP 18g, solvent DMF 3ml, isopropanol 5ml. Obtaining the P4VP-Br macromolecular initiator 10g that block number is 100 at last;

[0070] In step 2), with pentamethyldipropylenetriamine as ligand, and macromolecular initiator: ligand: CuCl=1:2:1 (molar ratio), the consumption of each raw material is respectively: initiator 0.5g, Ligand 0.019g, CuCl 5mg; solvent chlorobenzene 8ml, monomer MA(Az) 0.3g, that is, the amount of 12 molar equivalents of P4VP-Br.

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Abstract

The invention provides P4VP-b-PMA (Az) block copolymer, a high-through hexagonal prism membrane with adjustable prism diameter and a preparation method of the membrane, wherein the P4VP-b-PMA (Az) liquid crystal block copolymer has a following structure, wherein m is 10-900, and n is 2-900. The liquid crystal block copolymer is synthesized through two-step ATRP process, and BCP membranes different in thickness are obtained by spin-coating and membrane forming, and high-through hexagonal prism membranes different in thickness and pore diameter may be obtained by annealing the BCP membranes in a solvent atmosphere; this membrane has great application value and advantages in pH response, photoresponse and high-performance ion channel fields.

Description

technical field [0001] The invention relates to the technical field of new polymer materials, in particular to a P4VP-b-PMA (Az) block copolymer, a high-penetration hexagonal columnar film with adjustable column diameter and a preparation method. Background technique [0002] In recent years, with the development of nanotechnology, the research and published papers on block copolymer thin film self-assembly micro-nano processing technology have increased exponentially. Two chemically dissimilar block polymers formed by covalent linkage can self-assemble to form unique macromolecular structures, such as spherical / columnar / layered, etc. Block copolymer thin film microphase-separated nanostructured templates are used to fabricate periodic nanostructured functional materials. Among them, the research and development of block copolymer film self-assembly micro-nano processing technology can be roughly divided into three stages: (1) Research on the synthesis method of block copol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F293/00C08F220/36C08J5/18
CPCC08F220/36C08F293/005C08F2500/26C08J5/18C08J2353/00
Inventor 陈爱华屈婷
Owner BEIHANG UNIV
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