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A kind of preparation method of organosilicon material graded pore structure interlocking microcapsules

A technology of organosilicon and graded pores, applied in the fields of inorganic, organic and polymer materials, can solve the problems of complex preparation process, and achieve the effect of simple and easy preparation process, mild reaction conditions and good industrial development prospects.

Inactive Publication Date: 2016-08-24
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In 2014, the patents of our research group (CN103933911 A30-30, CN103933912 A30-30) proposed to use the method of atom transfer radical polymerization to form polymers on the surface of functionalized and regularly arranged silica colloidal crystal templates, and carry out cross-linking. After the hole, the template is removed, and the interlocking microcapsule of the polymer-based hierarchical pore structure is prepared. The preparation process is complicated. In the process of surface-induced atom transfer radical polymerization, harsh reaction conditions of 100 ° C, anhydrous and oxygen-free are required to form a hierarchical The process of pore structure requires complex cross-linking porogenic technology

Method used

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  • A kind of preparation method of organosilicon material graded pore structure interlocking microcapsules
  • A kind of preparation method of organosilicon material graded pore structure interlocking microcapsules
  • A kind of preparation method of organosilicon material graded pore structure interlocking microcapsules

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Effect test

Embodiment 1

[0038] (1) Surface functionalization of polystyrene colloidal crystal templates

[0039] Submerge 1g of the dried 500nm polystyrene colloidal crystal template prepared according to method 2 in 40mL concentrated sulfuric acid (98% by mass fraction, the same as the concentrated sulfuric acid in the following steps and embodiments), and react at a constant temperature of 40°C for 4h. After the reaction, Discard the liquid, wash with water until the pH value of the supernatant is constant, and freeze-dry the resulting product (the freeze-drying temperature is below -50°C and the steps are the same as the freeze-drying in the embodiments) to obtain the sulfonic acid group on the surface. Polystyrene colloidal crystal template;

[0040] attached figure 2 It was obtained by scanning the polystyrene colloidal crystal template (according to method 2) with a FEI Nano SEM 450 electron scanning electron microscope. It can be seen from the figure that the structure of the polystyrene col...

Embodiment 2

[0047] (1) Surface functionalization of polystyrene (PS) colloidal crystal templates

[0048] Immerse 1 g of the dried polystyrene colloidal crystal template with a particle size of 200 nm prepared according to method 1 in 40 mL of concentrated sulfuric acid, and react at a constant temperature of 40 ° C for 3 h. After the reaction, discard the liquid and wash with water until the pH of the supernatant is lower After transformation, the resulting product is freeze-dried to obtain a polystyrene colloidal crystal template with sulfonic acid groups on the surface;

[0049] (2) Preparation of PS@organosilicon core-shell composites

[0050] 1 g of dry polystyrene colloidal crystal templates with sulfonic acid groups on the surface were placed in the reactor, and then 10 mL of absolute ethanol and 3 mL of 3-aminopropyltriethoxysilane (APTES ), soaked at room temperature (25°C) for 5h, added 10mL of water to the reaction system, reacted at room temperature for 24h, washed the obtain...

Embodiment 3

[0053] (1) Surface functionalization of polystyrene (PS) colloidal crystal templates

[0054] Submerge 1 g of the dried polystyrene colloidal crystal template with a particle size of 700 nm prepared according to method 3 in 40 mL of concentrated sulfuric acid, and react at a constant temperature of 50 ° C for 8 h. After the reaction, discard the liquid and wash with water until the pH of the supernatant is lower After transformation, the resulting product is freeze-dried to obtain a polystyrene colloidal crystal template with sulfonic acid groups on the surface;

[0055] (2) Preparation of PS@organosilicon core-shell composites

[0056] A dry 1g polystyrene colloidal crystal template with sulfonic acid groups on the surface was placed in the reactor, and then 10mL of absolute ethanol and 5.5mL of 3-aminopropyltriethoxysilane ( APTES), after soaking at room temperature (25°C) for 5h, adding 10mL of water to the reaction system, reacting at room temperature for 24h, washing the...

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Abstract

The invention discloses a preparation method of an organic silicon material hierarchical porous structure interlocking microcapsule. The preparation method comprises the following steps: (1) performing surface functionalization on a polystyrene colloidal crystal template; (2) preparing PS@ organic silicon core-shell composite material and (3) removing polystyrene in the PS@ organic silicon core-shell composite material. Compared with a polymer-based hierarchical porous structure interlocking microcapsule, the preparation method has the advantages that the preparation technique is simple in process and moderate in reaction conditions; no subsequent cross-linking pore-forming is needed; as the obtained product is rich in amidogen, the preparation method has a huge potential application value in the field of nano-gold loaded catalysis.

Description

technical field [0001] The technical solution of the present invention relates to the field of inorganic, organic and polymer materials, in particular to a method for preparing interlocking microcapsules with hierarchical pore structure of organosilicon material. Background technique [0002] Microcapsules refer to micro-containers with hollow structures and shells made of polymer materials, inorganic materials or organic-inorganic hybrid materials. Microcapsules have the functions of protecting the core material in the capsule core, changing the weight, volume, state and surface properties of the material, isolating active ingredients, and controlling the slow release of the core material. In the late 1970s, Narty et al. (NartyJ J, et al.Nanoparticles a new colloidal drug delivery system.Pharmaceutica Acta Helvetiae, 1978,53:17-23.) proposed the concept of nanocapsules (Nanocapsules), which expanded microcapsules It has become a new type of material with nanometer size. T...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J13/02
CPCB01J13/02
Inventor 王小梅顾金艳张旭刘盘阁
Owner HEBEI UNIV OF TECH
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