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

Preparation method of organic nanometer titanium dioxide by means of reversed-phase microemulsion method

An inverse microemulsion and organic nanotechnology, applied in the treatment of dyed organosilicon compounds, dyed polymer organic compounds, fibrous fillers, etc., can solve the problems of high cost, difficult condition control, complex process, etc. The effect of improved lipophilicity, improved compatibility and simple process

Inactive Publication Date: 2014-07-02
SOUTH CHINA UNIV OF TECH
View PDF25 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the disadvantages of complex process, difficult condition control and high cost in the modification and application of nano-titanium dioxide, and provide a method for preparing organic nano-titanium dioxide by reverse-phase microemulsion method with simple process and mild reaction conditions. method, the prepared organic nano-titanium dioxide is evenly dispersed in the inverse microemulsion system with acrylate monomer as the oil phase, and can be directly added to water for pre-emulsification and emulsion polymerization

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
  • Preparation method of organic nanometer titanium dioxide by means of reversed-phase microemulsion method
  • Preparation method of organic nanometer titanium dioxide by means of reversed-phase microemulsion method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] At room temperature, mix 6g CTAB, 9g AA and 24g MMA evenly, then slowly add 10g deionized water dropwise to make the system clear, and obtain CTAB / AA / MMA / H 2 O inverse microemulsion system; add 4g butyl titanate and 1g A-174 into the inverse microemulsion system at the same time, control the addition rate to 0.4-0.6g / min, and then stir at room temperature for 24h to obtain organic nano Titanium dioxide.

[0019] figure 1 It is the infrared spectrogram of the preparation of organic nano-titanium dioxide by the inverse microemulsion method in this embodiment. Sample processing and testing steps: Add the organic nano-titanium dioxide system into the ethanol aqueous solution, and centrifuge at a speed of 3500rpm / min for 30min in a centrifuge (Shanghai Anting Scientific Instrument Factory, 800B) to remove free silane coupling agent and CTAB and acrylate monomer, repeated washing 3 times, and then dried in an oven at 45°C. Sample preparation with potassium bromide tablet m...

Embodiment 2

[0022] At room temperature, mix 7g CTAB, 7g AA and 30g butyl acrylate (BA) evenly, then slowly add 8g deionized water dropwise to make the system clear, and obtain CTAB / AA / BA / H 2 O inverse microemulsion system; add 6g of butyl titanate and 3g of A-171 into the inverse microemulsion system at the same time, control the addition rate to 0.4-0.6g / min, and then stir at room temperature for 6h to obtain organic nano Titanium dioxide.

Embodiment 3

[0024] At room temperature, mix 8g CTAB, 10g AA, 10g methyl methacrylate, 16g butyl acrylate, and then slowly add 12g deionized water dropwise to make the system clear, that is, CTAB / AA / MMA-BA / H 2 O inverse microemulsion system; add 5g butyl titanate and 4g A-151 into the inverse microemulsion system at the same time, control the addition rate to 0.4-0.6g / min, and then stir at room temperature for 12h to obtain organic nano Titanium dioxide.

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

PropertyMeasurementUnit
particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses a preparation method of organic nanometer titanium dioxide by means of a reversed-phase microemulsion method. The method comprises the following steps of: uniformly mixing hexadecyl trimethyl ammonium bromide, acrylic acid and an acrylic ester monomer at the room temperature, dropwise adding de-ionized water to enable the system to be clear, simultaneously adding butyl titanate and a silane coupling agent into the reversed-phase microemulsion system, controlling the adding speed at 0.4-0.6g / min, and stirring the resulting solution for 6-24h at the room temperature to prepare the organic nanometer titanium dioxide. Not only has the preparation method disclosed by the invention the characteristics of simpliness of process, mild reaction condition and the like, but also the prepared organic nanometer titanium dioxide is uniformly dispersed in the reversed-phase microemulsion system which takes the acrylic ester monomer as an oil phase, and can be directly added into water to carry out pre-emulsification and emulsion polymerization to effectively prevent nanometer titanium dioxide aggregation in the posttreatment process and in the redispersion process, and thus the preparation method has a wide application prospect.

Description

technical field [0001] The invention belongs to the field of inorganic nanoparticles, in particular to the preparation of organic nano titanium dioxide (TiO 2 )Methods. technical background [0002] Nano titanium dioxide (nano-TiO 2 ) In addition to small size effect, surface and interface effect, quantum size effect and macroscopic quantum tunneling effect, it also has special functions such as unique color effect, photocatalysis and ultraviolet shielding. It is used in the automotive industry, cosmetics, wastewater treatment, air purification and other fields have very broad application prospects. [0003] However, due to the large specific surface area and high surface energy of nano-titanium dioxide, it is in a non-thermodynamic stable state, so it is very easy to agglomerate, and there are still a large number of hydroxyl groups on the surface to show hydrophilicity, so it is difficult to evenly disperse in organic media. become the main bottleneck of its application...

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 Patents(China)
IPC IPC(8): C09C1/36C09C3/12C09C3/10
Inventor 曾幸荣叶超贤李红强李坤泉赖学军谢湖
Owner SOUTH CHINA UNIV OF TECH