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Aminated polymer hollow nanomaterial preparation method

A technology of nanomaterials and polymers, applied in chemical instruments and methods, water pollutants, other chemical processes, etc., can solve problems such as low activity, complex synthesis, and inability of functional groups to exert their effectiveness effectively, achieving broad application prospects, High reactivity and fast preparation

Active Publication Date: 2016-09-21
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Kwan et al. prepared hollow hemispherical polymer spheres by seed emulsion polymerization technology. The hollow hemispherical polymer showed good cavitation resistance and good permeability to tumor cells during ultrasonic drug delivery and release. However, this method passed Phase separation induces synthesis, which cannot control the synthesis well [J.Kwan et al., Small, 2015, 39, 5305-5314]
[0004] To sum up, research on the functionalization of hollow polymers has made some progress, but most of the existing synthesis processes are carried out in organic solvents, the steps are complicated, and the functional groups are often encapsulated and cannot effectively perform; although hollow hemispherical nanomaterials are Significant progress has been made in many fields, but due to its own synthesis characteristics, it has problems such as complex synthesis, difficulty in control, difficulty in finding suitable functional reagents, low synthesis efficiency, and low activity, making it difficult to further apply

Method used

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  • Aminated polymer hollow nanomaterial preparation method
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  • Aminated polymer hollow nanomaterial preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0023] Step 1: Accurately measure 280ml of ethanol and 70ml of deionized water to prepare a mixed solution, add 5ml of ethylenediamine, stir magnetically for 30 minutes, quickly add 14ml of TEOS (tetraethyl orthosilicate), stir vigorously for 10 minutes, then add 2g of m-benzene Diphenol, after the resorcinol is dissolved, add 2.8ml formaldehyde, adjust the reaction temperature to 30°C, and react for 24h. Subsequently, the prepared nanospheres were centrifuged and dried in an oven at 100°C.

[0024] The second step: at room temperature, put the prepared nano-spheres into 1% hydrofluoric acid for desiliconization treatment, centrifuge the material, and dry it in an oven at 100°C to prepare the aminated polymer hollow nanospheres.

Embodiment 2

[0026] Step 1: Accurately measure 405ml of ethanol and 133ml of deionized water to prepare a mixed solution, add 10ml of ethylenediamine, stir magnetically for 30 minutes, quickly add 7ml of TEOS (tetraethyl orthosilicate), stir vigorously for 5 minutes, then add 2.5g of Hydroquinone, after the resorcinol is dissolved, add 3.5ml formaldehyde, adjust the reaction temperature to 30°C, and react for 24h. Subsequently, the prepared nanospheres were centrifuged and dried in an oven at 100°C.

[0027] The second step: at room temperature, put the prepared nano-spheres into 12% hydrofluoric acid for desiliconization, then centrifuge the materials, and dry them in an oven at 100°C to prepare the aminated polymer hollow nanospheres.

Embodiment 3

[0029] Step 1: Accurately measure 532ml of ethanol and 266ml of deionized water to prepare a mixed solution, add 5ml of ethylenediamine, stir magnetically for 15 minutes, quickly add 7ml of TEOS (tetraethyl orthosilicate), stir vigorously for 10 minutes, then add 2g of m-benzene Diphenol, after the resorcinol is dissolved, add 2.8ml formaldehyde, adjust the reaction temperature to 70°C, and react for 48h. Subsequently, the prepared nanospheres were centrifuged and dried in an oven at 100°C.

[0030] The second step: at room temperature, put the prepared nano-spheres into 10% hydrofluoric acid for desiliconization treatment, then centrifuge the materials, and dry them in an oven at 100°C to prepare the aminated polymer hollow nanospheres.

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Abstract

The invention discloses an aminated polymer hollow nanomaterial preparation method. The method includes: in a water and ethyl alcohol system, taking ethylenediamine as a catalyst and an amine source, taking resorcinol and formaldehyde as polymer precursors, taking tetraethyl orthosilicate as a structural additive, performing emulsion polymerization to obtain silicon @ aminated resin core-shell nanospheres, and finally performing desilicification to obtain an aminated polymer hollow nanomaterial. Due to adoption of a one-step process for preparation of the aminated polymer hollow nanomaterial, compared with a traditional two-step method and a seed emulsion polymerization method, the preparation method has advantages of simplicity, convenience, mild conditions, reaction medium cleanness, few side reactions, high conversion rate and the like. The aminated polymer hollow nanomaterial prepared according to the method is highly dispersed and high in aminated groups and has a promising application prospect in the fields of energy sources, biological diagnosis, drug delivery, separation, environmental modification and the like.

Description

technical field [0001] The invention relates to a method for preparing a hollow nanometer material, in particular to a method for preparing an aminated polymer hollow nanometer material, and belongs to the field of material preparation. Background technique [0002] Due to its few functional groups, polymer hollow nanomaterials have few targeting sites and low activity. There is an application bottleneck in actual processing. This bottleneck can be broken through by grafting functional groups on the surface of the material. At present, there are two main methods for modifying functional groups on the surface of polymer hollow nanomaterials: (1) post-grafting method: through the interaction of hollow nanomaterials with functional groups or functional group polymers in organic solvents, the hollow nanomaterials The surface is grafted with functional groups, but this method has complex reactions and cumbersome processes; (2) Front grafting method: the method is simple and easy ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/30C08G14/073C02F1/28C02F101/20C02F101/22
CPCB01J20/264C02F1/285C02F2101/20C02F2101/22C08G14/06
Inventor 李健生曾梦丽刘超罗瑞王晶王连军孙秀云沈锦优韩卫清刘晓东
Owner NANJING UNIV OF SCI & TECH
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