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Assembling and disassembling method of functional polymer on surface of nano mesoporous carbon dioxide

A nano-mesoporous and silica technology, applied in the field of nano-materials, can solve cumbersome problems and achieve the effect of easy release

Active Publication Date: 2015-01-28
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In summary, the current methods for surface modification of mesoporous silica are too cumbersome, and a method that can conveniently and quickly realize the assembly and disassembly of polymers on the surface of mesoporous silica nanospheres has not been reported.

Method used

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  • Assembling and disassembling method of functional polymer on surface of nano mesoporous carbon dioxide
  • Assembling and disassembling method of functional polymer on surface of nano mesoporous carbon dioxide
  • Assembling and disassembling method of functional polymer on surface of nano mesoporous carbon dioxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Preparation of PEGMA-co-PMAAPHBA:

[0034] (1) Weigh 0.176g of N-(4aminophenyl)-methacrylamide, 0.475g of polyethylene glycol methacrylate and 10mg of initiator, dissolve it in 1.5mL THF, and place the solution in a reaction vessel to freeze After degassing and filling with argon, react in a sealed environment at 65-80°C for 24 hours, and freeze in liquid nitrogen for 2 minutes after polymerization to stop the reaction;

[0035] (2) The reacted solution was precipitated twice with 100 mL of n-hexane and dried.

[0036] (3) 0.4 g of the polymer obtained in step (2) was dissolved in 5 mL of dichloromethane to form solution A, and 0.15 g of 3,4-dihydroxybenzaldehyde was dissolved in 1 mL of methanol solution to form solution B;

[0037] (4) Mix the two solutions of A and B with N 2 After bubbling for 15 minutes, inject solution B into solution A and react for 12 hours. After the reaction, wash with dichloromethane, suction filter and dry to obtain the target substance. ...

Embodiment 2

[0047] 1. Polymer PEGMA-co-PMAAPHBA and nanometer mesoporous silica prepared with reference to Example 1.

[0048] 2. Prepare 5g / L nanometer mesoporous silica aqueous solution, 5g / L catechol functionalized polymer aqueous solution, 20g / L FeCl 3 Aqueous solution: Add 1.5mL of catechol-functionalized polymer aqueous solution and 0.5mL of metal ion aqueous solution into 2mL of nano-mesoporous silica aqueous solution in sequence, after shaking, the catechol-functionalized polymer coordinates with metal ions, The surface of the nanometer mesoporous silicon dioxide is assembled to obtain an aqueous solution of nanometer mesoporous silicon dioxide coated with a catechol functionalized polymer.

[0049] 3. Centrifuge the nano-mesoporous silica aqueous solution coated with catechol-functionalized polymer in 2, and redisperse the obtained nano-mesoporous silica coated with catechol-functionalized polymer in In water, add acetic acid solution to 1 mL of nano-mesoporous silica solution c...

Embodiment 3

[0051] 1. Polymer PEGMA-co-PMAAPHBA and mesoporous silica prepared with reference to Example 1.

[0052] 2. Prepare 5g / L nanometer mesoporous silica aqueous solution, 5g / L catechol functionalized polymer aqueous solution, 20g / L FeCl 3 Aqueous solution: Add 1.5mL of catechol-functionalized polymer aqueous solution and 0.4mL of metal ion aqueous solution to 1.5mL of nano-mesoporous silica aqueous solution in turn, after shaking, the catechol-functionalized polymer coordinates with metal ions, The assembly is realized on the surface of the nanometer mesoporous silicon dioxide, and an aqueous solution of nanometer mesoporous silicon dioxide coated with a catechol functionalized polymer is obtained.

[0053] 3. Centrifuge the nano-mesoporous silica aqueous solution coated with catechol-functionalized polymer in 2, and redisperse the obtained nano-mesoporous silica coated with catechol-functionalized polymer in In water, add acetic acid solution to 1 mL of nano-mesoporous silica so...

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Abstract

The invention relates to an assembling and disassembling method of a functional polymer on the surface of nano mesoporous carbon dioxide and belongs to the field of nano materials. The method comprises the following steps: by using water as a solvent, preparing a nano mesoporous carbon dioxide aqueous solution, a catechol functional polymer aqueous solution and a metal ion aqueous solution; sequentially adding the catechol functional polymer aqueous solution and the metal ion aqueous solution into the nano mesoporous carbon dioxide aqueous solution, and after oscillation, coordinating the catechol functional polymer and the metal ions, and assembling on the surface of nano mesoporous carbon dioxide to obtain the nano mesoporous carbon dioxide aqueous solution wrapped by the catechol functional polymer; carrying out centrifugal separation, re-dispersing the nano mesoporous carbon dioxide wrapped by the catechol functional polymer in water; and adding an acid solution into the nano mesoporous carbon dioxide aqueous solution wrapped by the catechol functional polymer to adjust the pH to 5-6 so as to disassemble the catechol functional polymer on the surface of the nano mesoporous carbon dioxide.

Description

technical field [0001] The invention belongs to the field of nanometer materials, and in particular relates to the assembly and disassembly behavior of a catechol functionalized polymer on the surface of silicon dioxide nanometer microspheres. Background technique [0002] Since Kresge et al first reported an ordered mesoporous silica material named MCM-41 in Nature in 1992, the research on mesoporous silica has rapidly become an international hotspot. The emergence of ordered mesoporous silica is a leap in the history of molecular sieves and porous materials. [0003] Mesoporous nano-silica can form organic-inorganic hybrid materials with organic or polymer materials, so that it can exert its own small size effect, surface and interface effect, and quantum size effect. At the same time, different modification methods can endow materials with various other properties. Therefore, it has a wide range of applications in catalysis, drug delivery and controlled release, gene tr...

Claims

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Application Information

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IPC IPC(8): C01B33/12A61K47/04A61K47/34
Inventor 戴李宗毛杰袁丛辉罗伟昂谢泓辉王爽陈婷邵志恒许一婷曾碧榕
Owner XIAMEN UNIV
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