Preparation method of zinc oxide and cellulose nanocrystal composite super-hydrophobic coating

A technology of super-hydrophobic coating and nanocrystals, which is applied in antifouling/underwater coatings, coatings, paints containing biocide, etc., can solve the problems of poor water resistance and mechanical properties, and achieve easy operation and simple preparation process , enhance the effect of wear resistance

Active Publication Date: 2016-06-15
ZHEJIANG DAFENGFAN FURNITURE CO LTD
View PDF5 Cites 16 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention proposes a preparation method of a zinc oxide/cellulose nanocrystal composite superhydrophobic coating, ...

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 zinc oxide and cellulose nanocrystal composite super-hydrophobic coating

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0012] A preparation method for a zinc oxide / cellulose nanocrystal composite superhydrophobic coating, specifically comprising the steps of:

[0013] 1) Prepare nano-zinc oxide (ZnO) by water bath method: take 80-150ml of zinc nitrate hexahydrate and hexamethylenetetramine solutions of equal concentration (0.005-0.1mol / L) respectively, mix them and use a heat collector to keep the temperature Heat the magnetic stirrer at a temperature of 85-95 ° C for 1-4 hours, take it out and let it stand for aging for 1-2 days, pour out the supernatant, and perform centrifugal washing to remove residual ions and ammonium salts in the solution, centrifuge The speed is 6000rpm, the time is 5min, and the number of times is 3-4 times, that is, nano-zinc oxide is obtained;

[0014] 2) Preparation of cellulose nanocrystal solution:

[0015] ① Acid treatment: treat microcrystalline cellulose (MCC) with sulfuric acid at a concentration of 56%, and the mass ratio is MCC:H 2 SO 4 =1: (9.15-10.35),...

Embodiment 1

[0028] A preparation method of zinc oxide / cellulose nanocrystal composite superhydrophobic coating, comprising the steps:

[0029] 1) Preparation of nano-zinc oxide by water bath method: take 90ml of the mass fraction as 0.05mol / L

[0030] The solution of zinc nitrate hexahydrate and hexamethylenetetramine was mixed and then stirred with a collector-type constant temperature heating magnetic stirrer at a temperature of 90°C for 2 hours. After taking it out, it was left to age for 1 day, and the supernatant was poured out. And carry out centrifugal washing to remove residual ions and ammonium salts in the solution, the centrifugal speed is 6000rpm, the time is 5min, and the number of times is 4 times to obtain nano-zinc oxide;

[0031] 2) Preparation of cellulose nanocrystals by sulfuric acid hydrolysis: first, microcrystalline cellulose (MCC) was treated with sulfuric acid at a concentration of 56%, and the mass ratio was MCC:H 2 SO 4 =1: (9.15-10.35), the acid hydrolysis te...

Embodiment 2

[0039] The preparation method of special morphology zinc oxide / cellulose nanocrystal composite superhydrophobic coating comprises the steps:

[0040] 1) Prepare nano-zinc oxide by water bath method: take 100ml mass fraction as 0.1mol / L

[0041] The solution of zinc nitrate hexahydrate and hexamethylenetetramine was mixed and then stirred with a collector-type constant temperature heating magnetic stirrer at a temperature of 95°C for 2 hours. After taking it out, it was left to age for 1 day, and the supernatant was poured out. And carry out centrifugal washing to remove residual ions and ammonium salts in the solution, the centrifugal speed is 6000rpm, the time is 5min, and the number of times is 4 times to obtain nano-zinc oxide;

[0042]2) Preparation of cellulose nanocrystals by sulfuric acid hydrolysis: first, microcrystalline cellulose (MCC) was treated with sulfuric acid at a concentration of 56%, and the mass ratio was MCC:H 2 SO 4 =1:10, the acid hydrolysis temperatu...

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 provides a preparation method of a zinc oxide and cellulose nanocrystal composite super-hydrophobic coating. The reparation method of the zinc oxide and cellulose nanocrystal composite super-hydrophobic coating is characterized by comprising the following steps that 1, nano zinc oxide with special morphology and a cellulose nanocrystal solution are mixed according to a certain proportion and added into a mixed solution of stearic acid and ethyl alcohol under the condition of magnetic stirring; 2, the mixture is taken out after a certain time and aged, dried and ground into powder, the powder is added into a mixed solution of deionized water, a catalyst ammonia water and a dispersing agent sodium dodecyl benzene sulfonate, and magnetic stirring is conducted after ultrasound is conducted till the mixture is a thick state; 3, a certain amount of polydimethylsiloxane and silane coupling agent are added for continuous magnetic stirring, and a solution is formed and coated on the base material surface to form the super-hydrophobic coating. The preparation method of the zinc oxide and cellulose nanocrystal composite super-hydrophobic coating has the advantages that the preparation technology is simple and easy to operate, the super-hydrophobic coating is suitable for being added into various coatings, and the properties of hydrophobicity, sterilization and abrasion resistance enhancing are achieved.

Description

technical field [0001] The invention relates to a method for preparing a zinc oxide / cellulose nanocrystal composite superhydrophobic coating, which belongs to the technical field of coatings and their modification. Background technique [0002] With the country's strong support for water-based coatings in recent years, the great development of water-based coatings has ushered in. Compared with traditional organic coatings, water-based coatings use water as a solvent to make them environmentally friendly, green, and low-pollution, which is in line with my country's The long-term road of green development has broad application prospects. However, due to the shortcomings of water-based coatings such as poor water resistance and poor mechanical properties, the promotion and popularization of large-scale water-based coatings are severely limited. [0003] Therefore, it is particularly important to invent a new type of superhydrophobic coating to modify water-based coatings. Nano...

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
IPC IPC(8): C09D183/04C09D5/14C09D7/12
CPCC08K2201/011C09D5/14C09D7/61C09D7/63C09D7/65C09D183/04C08L1/04C08K13/02C08K2003/2296C08K5/09C08K5/42C08K5/544
Inventor 吴燕朱文凯于成宁曹坤丽陈红吴智慧王晓棠惠小雨
Owner ZHEJIANG DAFENGFAN FURNITURE CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap