Unlock instant, AI-driven research and patent intelligence for your innovation.

Efficient and controllable inorganic particle surface modification method based on non-aqueous system dealcoholization reaction

A technology of inorganic particles and surface modification, which is applied in the direction of chemical instruments and methods, chemical/physical processes, etc., can solve the problems of uncontrollable and low surface grafting rate, achieve the improvement of grafting rate, improve hydrophobicity, and suppress side effects. The effect of the reaction

Active Publication Date: 2021-08-03
SICHUAN UNIV
View PDF5 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0020] The purpose of the present invention is to provide an efficient and controllable method for surface modification of inorganic particles to solve the problems of low and uncontrollable surface grafting rate in traditional inorganic particle surface modification methods

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Efficient and controllable inorganic particle surface modification method based on non-aqueous system dealcoholization reaction
  • Efficient and controllable inorganic particle surface modification method based on non-aqueous system dealcoholization reaction
  • Efficient and controllable inorganic particle surface modification method based on non-aqueous system dealcoholization reaction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] The raw materials used in this example are as follows: the inorganic oxide particles have a specific surface area of ​​262m 2 / g (particle size 15nm) nano-silica particles, the silane coupling agent is octadecyltrimethoxysilane, the reaction medium is benzyl alcohol, and the reaction assistants are ethylenediamine and dibutyltin dilaurate. The reaction conditions were as follows: the reaction temperature was 110°C; the reaction time was 30h.

[0061] In this embodiment, the above-mentioned raw materials are used to modify the surface of the inorganic oxide particles according to the following steps:

[0062] (1) Raw material treatment, the nano-silica particles to be modified are dried at 200°C for 6 hours; octadecyltrimethoxysilane, benzyl alcohol, ethylenediamine and dibutyltin dilaurate are treated with molecular sieve desiccant respectively 48h to remove the moisture contained;

[0063] (2) dispersing treatment, taking by weighing 0.033mol of fully dried nano-sili...

Embodiment 2

[0067] The raw materials used in this example are as follows: the inorganic oxide particles have a specific surface area of ​​90m 2 / g (particle size 25nm) nano-titanium dioxide particles, the silane coupling agent is octadecyltrimethoxysilane, the reaction medium is xylene, and the reaction assistants are trioctylamine and bismuth neodecanoate. The reaction conditions are as follows: the reaction temperature is 150°C; the reaction time is 15h.

[0068] In this embodiment, the above-mentioned raw materials are used to modify the surface of the inorganic oxide particles according to the following steps:

[0069] (1) Raw material treatment, the nano titanium dioxide particles to be modified were dried at 150°C for 8h; octadecyltrimethoxysilane, xylene, trioctylamine and bismuth neodecanoate were treated with molecular sieve desiccant for 48h respectively, and the remove the moisture contained;

[0070] (2) dispersion treatment, weigh 0.038mol of fully dried nano-titanium dioxi...

Embodiment 3

[0074] The raw materials used in this example are as follows: the inorganic oxide particles have a specific surface area of ​​60m 2 / g (particle size 100nm) nano-zirconia particles, the silane coupling agent is octadecyltrimethoxysilane, the reaction medium is toluene, and the reaction assistants are dibutylamine and dibutyltin diacetate. The reaction conditions are as follows: the reaction temperature is 110°C; the reaction time is 24h.

[0075] In this embodiment, the above-mentioned raw materials are used to modify the surface of the inorganic oxide particles according to the following steps:

[0076] (1) Raw material treatment, the nano-zirconia particles to be modified were dried at 180°C for 7h; octadecyltrimethoxysilane, toluene, dibutylamine and dibutyltin diacetate were treated with molecular sieve desiccant for 48h respectively, to remove the moisture contained;

[0077] (2) Dispersion treatment: Weigh 0.016 mol of fully dried nano-zirconia particles, put them into...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses an efficient and controllable inorganic particle surface modification method based on a non-aqueous system dealcoholization reaction, which comprises the following steps: by taking inorganic oxide particles, a silane coupling agent, a reaction medium and a reaction aid as raw materials, firstly carrying out water removal treatment on the raw materials; adding the silane coupling agent and the reaction aid into the uniform dispersion liquid of the inorganic oxide particles to form a reaction system; then, under the protection of introduced nitrogen, putting the reaction system into an oil bath, and conducting heating and reacting for 6-36 hours under a stirring condition; and purifying and drying the mixed solution obtained by the reaction to obtain the modified inorganic oxide particles. According to the method, the grafting rate of the silane coupling agent on the surfaces of inorganic oxide particles can be greatly improved, and the method has relatively high controllability. By using different modified substrates and / or changing reaction conditions, the grafting rate of silane coupling agents with different functions on the surfaces of inorganic particles can be effectively regulated and controlled, for example, the grafting rate of octadecane trimethoxy silane on the surface of nano silicon dioxide can be regulated and controlled within the range of 0-9.5 pieces / nm<2>.

Description

technical field [0001] The invention belongs to the technical field of functional materials, and relates to a modification technology of inorganic materials, in particular to an efficient and controllable method for surface modification of inorganic particles based on a non-aqueous system dealcoholization reaction. Background technique [0002] Inorganic nanoparticles have attracted extensive attention due to their special physical and chemical properties, and have shown unique properties in advanced manufacturing, biotechnology, pharmaceutical chemicals, daily necessities, etc., especially after chemical modification of their surfaces with specific structural design. , which can not only greatly improve its own properties, but also superimpose its advantageous properties with modifiers, thus becoming a research hotspot in the field of materials. The chemical modification of material surface has the advantages of versatility and strong binding force, and has increasingly bec...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): B01J8/10B01J8/08
CPCB01J8/10B01J8/082B01J2208/00805B01J2208/00964
Inventor 顾爱群余自力李佐才邱孝涛唐思琪
Owner SICHUAN UNIV