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Silane-modified titanium dioxide coating and application thereof

A titanium dioxide, silane modification technology, applied in coatings, grease/oily substance/floating matter removal devices, separation methods, etc., can solve the problems of low separation efficiency, expensive equipment, unsuitable for promotion, etc., and achieves simple process and cost. The effect of low, excellent hydrophobicity

Active Publication Date: 2016-08-31
ZHEJIANG UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems of low separation efficiency, high energy consumption, expensive equipment and unfavorable promotion in the current traditional oil-water separation method and equipment, the present invention proposes a high-efficiency oil-water separation method with simple preparation method and no secondary Contaminated silane-modified titanium dioxide coating and its application

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  • Silane-modified titanium dioxide coating and application thereof
  • Silane-modified titanium dioxide coating and application thereof
  • Silane-modified titanium dioxide coating and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Embodiment 1 A kind of silane-modified titanium dioxide coating of the present invention is characterized in that: it is prepared according to the following method:

[0040] 1) Preparation of titanium dioxide suspension: mix 0.1 g of titanium dioxide powder with 10 mL of absolute ethanol, and then ultrasonically prepare a 0.01 g / mL titanium dioxide suspension at 100 Hz;

[0041] 2) Preparation of silane-modified titanium dioxide spraying liquid: add 0.2 mL of octadecyltrimethoxysilane to the titanium dioxide suspension, continue ultrasonic mixing at 100 Hz, and then react at room temperature for 12 hours to obtain a superhydrophobic titanium dioxide spraying liquid, wherein The volume ratio of the silane to the titanium dioxide suspension is 0.02:1.

[0042] The ultrasonic time in step 1) is 60min.

[0043] The ultrasonic time in step 2) is 15 min.

Embodiment 2

[0044] Embodiment 2 The application of the silane-modified titanium dioxide spraying liquid of the present invention in oil-water separation is characterized in that: the application method is carried out according to the following steps:

[0045] (1) Clean the substrate and adjust the substrate to a size suitable for the straight-through pipe joint;

[0046](2) Spray the silane-modified titanium dioxide (nozzle diameter 0.3mm, spray volume 500mL / min, spray pressure control 300kPa, spray time 3s) solution on a clean substrate (coating thickness 5μm) and place Treat in an oven at 100°C for 2 hours to obtain a substrate with a hydrophobic coating;

[0047] (3) Fill the substrate with the hydrophobic coating into the inside of the straight-through pipe joint, then fix the straight-through pipe joint on the support, and the liquid outlet of the straight-through pipe joint communicates with the liquid inlet of the collector;

[0048] (4) Pour the oil-water mixture to be separated ...

Embodiment 3

[0050] Embodiment 3 The special equipment constructed according to the application described in Embodiment 2, such as figure 2 As shown, it includes a substrate 1, a straight-through pipe joint 2, a bracket 3 and an oil collector 4, the surface of the base 1 is coated with a silane-modified titanium dioxide coating, and the base 1 is filled in the straight-through pipe joint 2 Inside, the straight-through pipe joint 2 is mounted on the bracket 3, and the liquid outlet of the straight-through pipe joint 2 is kept in communication with the liquid inlet of the collector 4, 5 is the oil-water mixture, and 6 is the separation The water that goes out, 7 is the separated oil.

[0051] The base 1 is metal mesh or absorbent cotton.

[0052] The base 1 is a copper mesh, wherein the copper mesh is cut into a circle with a diameter of about 30 mm, and the size of the copper mesh is 50 μm in diameter and 60 μm×40 μm in hole.

[0053] The material of the straight pipe joint 2 is polytetr...

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Abstract

The invention discloses silane-modified titanium dioxide coating and application thereof. Preparation of the silane-modified titanium dioxide coating includes adding silane into titanium dioxide suspension liquid. Modified titanium dioxide has hydrophobic and oleophilic characteristics; the treated titanium dioxide suspension liquid is sprayed on metal nets or cotton, and oil can flow through the copper nets while water is isolated owing to the hydrophobic and oleophilic characteristics of coatings when oil and water mixed liquid is poured on the copper nets; oil stain in the water can be quickly removed by the cotton when the cotton is immersed in the oil and water mixed liquid, so that the oil can be separated from the water. The silane-modified titanium dioxide coating and the application have the advantages that methods for preparing the coatings are simple, the silane-modified titanium dioxide coating has stable characteristics and is good in repeatability, the titanium dioxide nanometer coatings are attached onto the copper nets to form micro-nano composite structures, accordingly, the surface hydrophobic properties can be enhanced, water contact angles can reach 156 degrees, the silane-modified titanium dioxide coating can bear high pressures of the oil and water mixed liquid, the oil and water separation efficiency can be improved, and the silane-modified titanium dioxide coating can be widely applied to treating oily sewage in the pharmaceutical industry, the chemical industry and the like.

Description

technical field [0001] The invention relates to a silane-modified titanium dioxide coating and its application. Background technique [0002] The massive discharge of oily wastewater in daily life and the frequent occurrence of oil spill accidents at sea, as well as the discharge of oily wastewater from industries such as petroleum, chemical and pharmaceutical industries, have brought serious damage to the living environment on which human beings depend and have a negative impact on our health. also had adverse effects. Therefore, the treatment of oily sewage has attracted people's attention. The traditional oil-water separation methods include: sedimentation separation method, centrifugal separation method, electrolysis separation method and air flotation separation method, etc., but each of these methods has some defects, and some separation efficiency Not high, some energy consumption is too high, and some require expensive equipment, so it is not suitable for promotion....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D1/00C02F1/40
CPCC02F1/40C09D1/00
Inventor 吴化平刘爱萍鲁聪达李吉泉丁浩柴国钟朱凯曹彬彬吴兵兵
Owner ZHEJIANG UNIV OF TECH