Multilayer-shell wormlike mesoporous silica and preparation method thereof

A mesoporous silica and multi-layer shell technology, applied in the direction of silica, silicon oxide, etc., can solve the problems of preparing multi-layer shell worm-like mesoporous silica materials that have not been reported, and achieve easy implementation of process operation, The effect of preventing large-scale leakage

Active Publication Date: 2016-10-26
山东济清科技服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In general, there have been many reports on the self-assembly of CD with single or double surfactants to form aggregates with different morphologies, but there is no report on the preparation of multilayered worm-like Mesoporous silica material

Method used

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  • Multilayer-shell wormlike mesoporous silica and preparation method thereof
  • Multilayer-shell wormlike mesoporous silica and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Put a 100mL beaker on a magnetic stirrer, add 35mL of distilled water and heat up to 35°C, add 0.141g of CTAB and 0.113g of DDAB to the distilled water under stirring, stir to form a transparent solution, then add 0.07g of β-CD and stir until completely dissolved , and then add 0.8mL ammonia water, after 2h, take 2g TEOS and slowly add dropwise to the solution under stirring, after sealing, keep stirring at constant temperature for 24h. The obtained white precipitate solution was transferred to a 100mL reaction kettle, and placed in a thermostat at 100°C for 24h. After cooling, the white precipitate solution was filtered, and the obtained precipitate was repeatedly filtered and washed with distilled water. The obtained precipitate was dried at 48 °C for 10 h, and then the precipitate was calcined in a tubular calciner at 500 °C for 4 h to obtain multi-layered worm-like mesoporous silica, such as figure 1 and figure 2 As shown, 3-4 layers of worm-like mesoporous silic...

Embodiment 2

[0031] Put a 100mL beaker on a magnetic stirrer, add 35mL distilled water and heat up to 35°C, add 0.141g CTAB and 0.113g DDAB to the distilled water successively under stirring, stir to form a transparent solution, add 0.1gβ-CD, stir until completely Dissolve, then add 0.8mL of ammonia water, after 2h, take 2g of TEOS and slowly drop into the solution under stirring, seal and stir at constant temperature for 24h. The obtained white precipitate solution was transferred to a 100mL reaction kettle, and placed in a thermostat at 100°C for 24h. After cooling, the white precipitate solution was filtered, and the obtained precipitate was repeatedly filtered and washed with distilled water. The obtained precipitate was dried at 48° C. for 10 h, and then the precipitate was calcined in a tubular calciner at 500° C. for 4 h to obtain a multi-layered worm-like mesoporous silica whose morphology was similar to that of Example 1.

Embodiment 3

[0033] Put a 100mL beaker on a magnetic stirrer, add 35mL distilled water and heat up to 35°C, add 0.141g CTAB and 0.113g DDAB to the distilled water successively under stirring, stir to form a transparent solution, add 0.13gβ-CD, stir until completely Dissolve, then add 0.8mL of ammonia water, after 2h, take 2g of TEOS and slowly drop into the solution under stirring, seal and stir at constant temperature for 24h. The obtained white precipitate solution was transferred to a 100mL reaction kettle, and placed in a thermostat at 100°C for 24h. After cooling, the white precipitate solution was filtered, and the obtained precipitate was repeatedly filtered and washed with distilled water. The obtained precipitate was dried at 48° C. for 10 h, and then the precipitate was calcined in a tubular calciner at 500° C. for 4 h to obtain a multi-layered worm-like mesoporous silica whose morphology was similar to that of Example 1.

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Abstract

The invention discloses a multilayer-shell wormlike mesoporous silica material and a preparation method thereof. The preparation method includes the steps of firstly, sequentially adding cetyltrimethyl ammonium bromide (CTAB) and didodecyldimethyl ammonium bromide (DDAB) into water, stirring for dissolving, adding beta-CD, and stirring to achieve complete dissolving; secondly, adding ammonia water into the solution obtained in the first step, evenly stirring, and adding tetraethyl orthosilicate (TEOS) to obtain suspension; thirdly, continuously performing stirring reaction on the suspension obtained in the second step to obtain a white sediment solution, and performing solvent thermal treatment on the white sediment solution; fourthly, filtering, washing, drying and grinding the white sediment solution after the solvent thermal treatment, and calcining to obtain multilayer-shell wormlike mesoporous silica. The multilayer-shell wormlike mesoporous silica has a multilayer-shell structure with 3-4 layers and large cavities and has evident advantages in fields such as drug controlled release.

Description

technical field [0001] The invention relates to the controllable synthesis of multi-layer shell worm-like mesoporous silica, belonging to the technical field of material synthesis. Background technique [0002] Mesoporous silica material is an inorganic biological material with the advantages of high specific surface area, large pore volume, controllable shape and size, etc. It has the dual characteristics of mesoporous materials and nanomaterials, and has very high chemical stability and biocompatibility. In recent years, with the development of mesoporous material synthesis technology, the preparation of mesoporous silica materials with rich morphology and structure has become a current research hotspot. [0003] Cyclodextrin (CD) is a truncated cone-shaped cyclic oligosaccharide with axial symmetry. It is named according to the number of α-1,4-glucopyranose units (6, 7, 8) it contains For α-, β-, γ-cyclodextrin. The CD molecular cavity is hydrophobic (weak polarity), w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/18
CPCC01B33/18C01P2004/03C01P2004/04C01P2004/62C01P2004/64
Inventor 周国伟姜萌萌李世超李艳
Owner 山东济清科技服务有限公司
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