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PH/Mg<2+>-stimulus-response nano container and preparation method thereof

A nano-container and stimuli-responsive technology, which is applied in the direction of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problem of anti-corrosion coatings that do not have acid-base stimuli response controllable release, waste of corrosion inhibitors, etc. problem, achieve the effect of good application prospect, simple preparation method and high sensitivity

Inactive Publication Date: 2016-03-30
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the anti-corrosion coating prepared above does not have the controllable release in response to acid-base stimulation, wastes corrosion inhibitors, and cannot form a durable, stable and effective protection for the metal surface.

Method used

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  • PH/Mg&lt;2+&gt;-stimulus-response nano container and preparation method thereof
  • PH/Mg&lt;2+&gt;-stimulus-response nano container and preparation method thereof
  • PH/Mg&lt;2+&gt;-stimulus-response nano container and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] 1. Preparation of Mesoporous Nano-Silica Microspheres

[0036] Dissolve 0.4g NaOH solid in 5mL deionized water, and the concentration is 2mol L -1 Mix 3.5 mL of NaOH solution with 1 g of cetyltrimethylammonium bromide (CTAB) and 480 mL of deionized water, heat the reaction system to 80°C at a speed of 500 rpm, and keep it warm for 30 minutes for activation. Measure 5mL tetraethyl orthosilicate (TEOS) for injection and add it dropwise to the system, complete the addition in 30 minutes, and react at 80°C for 2 hours. After the reaction was completed, it was filtered while it was hot, the product was fully washed with heated deionized water, and vacuum-dried at 80°C.

[0037] Weigh 0.5g of the dried solid product, grind it thoroughly, add a mixed solution of 100mL methanol and 6mL concentrated hydrochloric acid, fully ultrasonically disperse, reflux at 65°C for 12h, centrifuge, wash thoroughly with water and methanol, and Vacuum drying to obtain mesoporous silica nanosph...

Embodiment 2

[0046] 1. Preparation of Mesoporous Nano-Silica Microspheres

[0047] Dissolve 0.2g NaOH solid in 2.5mL deionized water, and the concentration is 2mol L -1 Mix 1.75mL of NaOH solution with 0.5g cetyltrimethylammonium bromide (CTAB) and 240mL deionized water, heat the reaction system to 80°C at a speed of 500rpm, and keep it warm for 30min. Measure 2.5mL tetraethyl orthosilicate (TEOS) for injection and add it dropwise to the system, complete the addition within 15 minutes, and react at 80°C for 2 hours. After the reaction was completed, it was filtered while it was hot, the product was fully washed with heated deionized water, and vacuum-dried at 80°C.

[0048] Weigh 0.5g of the dried solid product, grind it thoroughly, add a mixed solution of 100mL methanol and 6mL concentrated hydrochloric acid, fully ultrasonically disperse, reflux at 65°C for 12h, centrifuge, wash thoroughly with water and methanol, and Vacuum drying to obtain mesoporous silica nanospheres (MCM-41).

[...

Embodiment 3

[0060] 1. Preparation of Mesoporous Nano-Silica Microspheres

[0061] Dissolve 0.2g NaOH solid in 2.5mL deionized water, and the concentration is 2mol L -1 Mix 1.75mL of NaOH solution with 0.5g cetyltrimethylammonium bromide (CTAB) and 240mL deionized water, heat the reaction system to 80°C at a speed of 500rpm, and keep it warm for 30min. Measure 2.5mL tetraethyl orthosilicate (TEOS) for injection and add it dropwise to the system, complete the addition within 15 minutes, and react at 80°C for 2 hours. After the reaction was completed, it was filtered while it was hot, the product was fully washed with heated deionized water, and vacuum-dried at 80°C.

[0062] Weigh 0.5g of the dried solid product, grind it thoroughly, add a mixed solution of 100mL methanol and 6mL concentrated hydrochloric acid, fully ultrasonically disperse, reflux at 65°C for 12h, centrifuge, wash thoroughly with water and methanol, and Vacuum drying to obtain mesoporous silica nanospheres (MCM-41).

[...

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Abstract

The invention discloses a pH / Mg<2+>-stimulus-response intelligent nano container and a preparation method thereof. Mesoporous nanosilica serves as the skeleton of the intelligent nano container, the surface of the intelligent nano container is modified with supermolecular valves, and the interior of the intelligent nano container is loaded with magnesium alloy corrosion inhibitor molecules, namely, paeonol. The nano container is high in sensitivity, capable of making accurate responses to multiple external stimuli and applicable to multiple fields, and the preparation method is simple. Meanwhile, when the nano container is under different pH values, macrocyclic molecules can remain at different positions on molecule symmetry axes of the surfaces of nanoparticles as 'valve covers' or can be separated out as solids, and due to the characteristic, controlled release is made possible.

Description

technical field [0001] The present invention relates to a pH / Mg 2+ - A stimulus-responsive nano container and a preparation method thereof, belonging to the field of nano material science. Background technique [0002] Mesoporous silica nanoparticles possess many outstanding features, such as chemical stability, high specific surface area, uniform and tunable mesoporous structure, and diversity of surface modification, and are considered to be very promising as positional delivery loads. Molecular nanocontainers. This kind of advanced nanomaterials has received extensive attention in recent years, and the design of nanomaterials that efficiently transport load molecules has always been one of the problems that need to be solved urgently in the world, because in the actual application process, the external environment is very complicated, and the load molecules are prone to premature delivery. Leaky conditions, which prevent effective delivery of payload molecules at target...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F11/00B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C23F11/00
Inventor 傅佳骏丁晨迪刘影冯晶王明东
Owner NANJING UNIV OF SCI & TECH