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Modification and modification method of ceramic membrane and modified ceramic membrane

A technology for modification and modification of ceramic membranes, applied in the field of modification and modification of ceramic membranes and modified ceramic membranes, can solve the problems of poor stability of organic polymer membranes, and achieve good long-term stability and service life, good stability and performance. The effect of improving hydrophobicity and self-cleaning ability

Active Publication Date: 2019-10-11
PETROCHINA CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problem of poor stability of traditional organic polymer membranes in the above-mentioned prior art, the purpose of the present invention is to provide a method for modifying ceramic membranes and the prepared modified ceramic membranes to obtain a good long-term stability Hydrophobic modified inorganic ceramic membranes, so that inorganic ceramic hydrophobic membranes can be used commercially

Method used

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  • Modification and modification method of ceramic membrane and modified ceramic membrane
  • Modification and modification method of ceramic membrane and modified ceramic membrane
  • Modification and modification method of ceramic membrane and modified ceramic membrane

Examples

Experimental program
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Embodiment 1

[0063] This embodiment provides a method for modifying a ceramic membrane, which includes the following steps:

[0064] Step 1: Surface-treat the silicon nitride ceramic membrane. The treatment method is: put the silicon nitride ceramic membrane into a 5mol / L sodium hydroxide solution and boil for 30 minutes. After taking it out, wash it with pure water and dry it to obtain fresh nitrogen. Silicon ceramic membrane;

[0065] Step 2, add 2.5g of methyldichlorosilane and 2.5g of dimethyldichlorosilane into 10mL of n-heptane, stir well to obtain solution A; soak the above-mentioned fresh silicon nitride ceramic membrane in solution A , take out and dry;

[0066] Step 3, transfer the ceramic film coated in step 2 to a boron nitride porcelain boat, place the boron nitride porcelain boat in the quartz chamber of the resistance wire furnace, and carry out slow ammonia gas purging (the ammonia gas speed is 100mL / min), until the surface of the ceramic membrane is completely covered b...

Embodiment 2

[0074] This embodiment provides a method for modifying a ceramic membrane, which includes the following steps:

[0075] Step 1: Surface-treat the silicon nitride ceramic membrane. The treatment method is: put the silicon nitride ceramic membrane into a 10mol / L potassium hydroxide solution and boil for 1 hour. After taking it out, wash it with pure water and dry it to obtain fresh nitrogen. Silicon ceramic membrane;

[0076] Step 2, add 2.5g of methyldichlorosilane and 2.5g of dimethyldichlorosilane into 10mL of ethanol, stir evenly to obtain solution A; soak the above-mentioned fresh silicon nitride ceramic membrane in solution A, take out dry;

[0077] Step 3, transfer the ceramic film coated in step 2 to a boron nitride porcelain boat, place the boron nitride porcelain boat in the quartz chamber of the resistance wire furnace, and carry out slow ammonia gas purging (the ammonia gas speed is 100mL / min), until the surface of the ceramic membrane is completely covered by the...

Embodiment 3

[0084] This embodiment provides a method for modifying a ceramic membrane, which includes the following steps:

[0085] Step 1: Surface-treat the silicon nitride ceramic membrane. The treatment method is: put the silicon nitride ceramic membrane into a saturated calcium hydroxide solution and boil for 30 minutes. After taking it out, wash it with pure water and dry it to obtain fresh silicon nitride Ceramic Membrane;

[0086] Step 2: Add 5g of methyldichlorosilane and 5g of dimethyldichlorosilane into 10mL of ethanol, stir evenly to obtain solution A; soak the above-mentioned fresh silicon nitride ceramic membrane in solution A, take out and dry;

[0087] Step 3, transfer the ceramic film coated in step 2 to a boron nitride porcelain boat, place the boron nitride porcelain boat in the quartz chamber of the resistance wire furnace, and carry out slow ammonia gas purging (the ammonia gas speed is 100mL / min), until the surface of the ceramic membrane is completely covered by so...

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Abstract

The invention provides a modification method of a ceramic membrane and a modified ceramic membrane. The modification method of the ceramic membrane comprises the following steps: performing surface treatment on the ceramic membrane to obtain a fresh ceramic membrane; coating the surface of the ceramic membrane with a silane compound through an impregnation method or a sedimentation method; performing thermal treatment on the coated ceramic membrane under a protective atmosphere, naturally cooling to obtain the modified ceramic membrane after the modification. The modification method of the ceramic membrane provided by the invention has advantages that the modification process is simple, the raw material cost is low, and secondary pollution on the environment can be avoided in the modification process; compared with the common organic modification material, the modified ceramic membrane prepared through modification has the features of high long-term stability, strong acid-base resistance, and strong hydrophobic property; and the modified ceramic membrane can be extensively applied to sea water desalinization, oil-water separation, wastewater treatment and other fields.

Description

technical field [0001] The invention belongs to the technical field of ceramic membrane surface treatment, and relates to a modification method of a ceramic membrane and a modified ceramic membrane. Background technique [0002] With the development of productivity and the advancement of science and technology, the separation method has also changed from simple to complex, the technology from low-level to high-level, and the process has changed from one method to the combination of multiple processes. Continuous innovation, process improvement, and cost reduction to meet human needs The ever-changing need for a better life. Among the many separation technologies, membrane separation appeared in the early 20th century and rose rapidly after the 1960s. Membrane separation is a new separation technology that separates, purifies and concentrates the target mixture under the action of external driving force. The membrane used for membrane separation is a semi-permeable membrane...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D69/02B01D67/00B01D71/02
Inventor 卢德唐郑德温王俊伟王红岩郝绿原李群张壁葛稚新方朝合孔舫董大忠刘洪林窦洪波
Owner PETROCHINA CO LTD
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