A preparing method of a polymer Janus nanosheet PtBMA/PAM

A technology of polymers and nanosheets, applied in the field of preparation of polymer Janus nanosheets PtBMA/PAM, can solve the problems of complex methods, harsh conditions, and lack of universality, and achieve good application prospects and good emulsifying properties

Inactive Publication Date: 2017-03-15
LIAONING UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing methods for preparing Janus flake materials are complex, harsh conditions, and not universal

Method used

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  • A preparing method of a polymer Janus nanosheet PtBMA/PAM
  • A preparing method of a polymer Janus nanosheet PtBMA/PAM
  • A preparing method of a polymer Janus nanosheet PtBMA/PAM

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Example 1 Preparation of polymer Janus nanosheets PtBMA / PAM1

[0030] (1) Synthesis of SNP-Br

[0031] 1. Nano SiO 2 Preparation of microspheres (SNPs)

[0032] Weigh 42.6g of ethanol, 25g of 25% ammonia water, and 9.75g of water respectively, put them into a 250mL round bottom flask, and stir evenly. Mix 7.7g TEOS and 30g ethanol evenly, place in a dropping funnel, drop dropwise into a round bottom flask, and react at 35°C for 12 hours under magnetic stirring. After the reaction, the reaction mixture was centrifuged to remove the supernatant, and the white solid was washed three times with a mixed solution of ethanol and water with a volume ratio of 9:1 to obtain nano-SiO 2 microspheres (SNPs). The product was put into a vacuum oven for later use. The synthetic route is as follows:

[0033]

[0034] 2. Nano SiO 2 Microspheres (SNPs) surface amino modification (SNP-NH 2 ):

[0035]1.5g of SNPs was added to 50mL of anhydrous toluene, and ultrasonicated until ...

Embodiment 2

[0058] Example 2 Preparation of polymer Janus nanosheets PtBMA / PAM2

[0059] (1) Synthesis of SNP-Br: with Example 1

[0060] (2) Synthesis of SNP-g-PtBMA-Br2

[0061] After ultrasonically dispersing 0.1 g of SNP-Br in 8 mL of dry DMF, transfer to a polymerization tube, add 0.75 g tBMA, 0.15 g EGDMA, 36 μL of Me 6 TREN, mix well, freeze with liquid nitrogen, evacuate, melt, cycle liquid nitrogen freeze-vacuum-thaw three times, add catalyst 30mg CuBr in nitrogen atmosphere, and perform another cycle of liquid nitrogen freeze-vacuum-thaw, Seal the tube under vacuum. React at 73°C for 12 hours. The reaction was terminated by exposure to air. Wash by centrifugation, remove the supernatant, and dry the solid to obtain SNP-g-PtBMA-Br2.

[0062] (3) Synthesis of SNP-g-PtBMA-b-PAM2

[0063] After ultrasonically dispersing 0.1 g of SNP-g-PtBMA-Br2 in 8 mL of dry DMF, transfer to a polymerization tube, add 0.6 g of AM, 24 mg of PMDETA, mix well, freeze with liquid nitrogen, vacuum...

Embodiment 3

[0066] Example 3 Preparation of polymer Janus nanosheets PtBMA / PAM3

[0067] (1) Synthesis of SNP-Br: with Example 1

[0068] (2) Synthesis of SNP-g-PtBMA-Br3

[0069] After ultrasonically dispersing 0.1 g of SNP-Br in 8 mL of dry DMF, transfer to a polymerization tube, add 1.5 g of tBMA, 0.12 g of EGDMA, 36 μL of Me 6 TREN, mix well, freeze with liquid nitrogen, evacuate, melt, cycle liquid nitrogen freeze-vacuum-thaw three times, add catalyst 30mg CuBr in nitrogen atmosphere, and perform another cycle of liquid nitrogen freeze-vacuum-thaw, Seal the tube under vacuum. React at 73°C for 24 hours. The reaction was terminated by exposure to air. Wash by centrifugation, remove the supernatant, and dry the solid to obtain SNP-g-PtBMA-Br3.

[0070] (3) Synthesis of SNP-g-PtBMA-b-PAM3

[0071] After ultrasonically dispersing 0.1 g of SNP-g-PtBMA3 in 8 mL of dry DMF, transfer to a polymerization tube, add 1.5 g of AM, 48 mg of PMDETA, mix well, freeze with liquid nitrogen, evac...

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Abstract

The invention relates to a preparing method of a polymer Janus nanosheet PtBMA / PAM. SNP is adopted as a template. Amination modification and bromination modification are performed on the surface of the SNP to obtain SNP-Br. Polymerization of tert-butyl methacrylate is initiated by adopting the SNP-Br as an initiator, adopting CuBr as a catalyst, adopting Me<6>TREN as a ligand and adopting EGDMA as a crosslinking agent to obtain SNP-g-PtBMA-Br, and then SNP-g-PtBMA-b-PAM is prepared by ATRP active polymerization adopting the SNP-g-PtBMA-Br as an initiator, adopting acrylamide as a monomer, adopting pentamethyldiethylenetriamine as a ligand and adopting cuprous bromide as a catalyst. Finally, hydrofluoric acid is used for etching to obtain a polymer balloon, and the polymer balloon is then crushed by a cell crusher to obtain a Janus nanosheet. The prepared polymer Janus nanosheet has a good emulsifying property.

Description

technical field [0001] The invention belongs to the field of chemical synthesis, and in particular relates to a preparation method of a polymer Janus nanosheet PtBMA / PAM. Background technique [0002] Janus material refers to an anisotropic material with two different structures and chemical compositions. Such asymmetric properties, such as hydrophilic-hydrophobic, positive charge-negative charge, polarity-nonpolarity, and morphology asymmetry, etc., endow Janus materials with special functionality and can meet complex environmental conditions. next needs. [0003] On the basis of Janus particles, people began to pay attention to Janus flake materials. This is because compared with the spherical particles themselves, the anisotropic Janus flakes have more abundant phase behavior. For Janus flakes, not only the chemical composition is non-centrosymmetric, but also the morphology is non-centrosymmetric. Compared with rigid inorganic Janus nanosheets, flexible polymeric Janu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/12C08J9/26C08F220/18C08F220/56
CPCC08F220/18C08F220/56C08J3/12C08J9/26C08J2201/044C08J2333/08C08J2333/26C08J2433/08C08J2433/26
Inventor 张国林邱红芳吴秋华刘学矣杰宋溪明
Owner LIAONING UNIVERSITY
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