Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A kind of preparation method of superamphiphobic nano-cellulose airgel

A nanocellulose, airgel technology, applied in the direction of coating, etc., to achieve enhanced deposition, enhanced success and effective, high reactivity effect

Active Publication Date: 2022-02-01
NANJING FORESTRY UNIV
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The research on superhydrophobic nanocellulose aerogels has been reported extensively, but the research on superamphiphobic nanocellulose aerogels has hardly been reported.

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
  • A kind of preparation method of superamphiphobic nano-cellulose airgel
  • A kind of preparation method of superamphiphobic nano-cellulose airgel
  • A kind of preparation method of superamphiphobic nano-cellulose airgel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Embodiment 1: the preparation of nanocellulose airgel

[0034] (1) Nanocellulose (NFC) prepared by TEMPO oxidation: Nanocellulose is prepared by TEMPO oxidation. First soak the pulp board in water to obtain the slurry after thawing, take 10g of absolute dry fiber slurry and soak it in 500mL of deionized water, add TEMPO (0.16g), NaBr (1.6g) successively, and continuously mechanically stir at room temperature. It mixes well. Then 120 mL of NaClO (6.6 wt%) solution was added to start the oxidation reaction. During the reaction process, 2mol / L NaOH was used to adjust the pH value to maintain the pH value of the entire reaction system between 10-10.5 until the pH value no longer decreased, and 50 mL of ethanol was added to terminate the reaction. The slurry after the reaction was first suction filtered, then soaked in 0.1mol / L HCl solution to acidify and wash, and the steps of washing and suction filtration were repeated three times. The washed slurry was quantified to 1...

Embodiment 2

[0040] Example 2: Characterization of nanocellulose aerogels

[0041] (1) FTIR analysis: the fully dried airgel sample was pressed into thin slices in a tablet press. The FTIR spectrum of the airgel recorded by the total reflection infrared spectrometer FTIR-650, the measurement wavelength range is 4000-650cm -1 . Pure NFC was used as the control group of the experiment.

[0042] FT-IR spectra of NFC, FNA1.5 and FNSA1.5 as figure 2 shown. The aerogels prepared under different NFC concentrations had similar FTIR spectra, which were analyzed with FNA1.5 as a representative. Airgel NFC samples showed significant differences before and after CVD. at 3344cm -1 and 1730cm -1 The peaks at can be attributed to the stretching vibrations of cellulose-OH and -COOH, respectively. The C-O stretching vibration peak of NFC appears at 1056cm -1 place. The typical absorption peaks of the Si-O-Si bond of FNA1.5 and FNSA1.5 and the cellulose C-O bond are at 1130-1000 cm -1 The absorp...

Embodiment 3

[0048] Example 3: Factors Affecting the Lyophobic Properties of Nanocellulose Airgel

[0049] SEM analysis method: Spray gold on the surface of the thoroughly dried airgel sample and observe the surface morphology of the sample through a JSM-7600F field emission scanning electron microscope and take pictures. The operating voltage of the electron microscope is 5kV, and each sample selects five different The location is scanned and observed, and photos with repeated features are selected for analysis.

[0050]Contact angle measurement method: use the T200-Auto3 Plus optical contact angle tester to measure the wettability of the sample. The software of the instrument automatically calculates the contact angle value according to Young's equation. In the static mode at room temperature, 4 μL of water droplets, glycerol, ethylene glycol, castor oil, and hexadecane were dropped on the surface of the fluorinated airgel samples, and the contact angles of each sample were measured at ...

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
lengthaaaaaaaaaa
widthaaaaaaaaaa
depthaaaaaaaaaa
Login to View More

Abstract

The invention discloses a preparation method of super-amphiphobic nano-cellulose airgel, which belongs to the technical field of polymer materials. The present invention prepares the nanometer cellulose with TEMPO oxidation method and the nanometer SiO that method prepares 2 Particles are used as raw materials, the mixed suspension is prepared and injected into the mold, frozen in liquid nitrogen, and then freeze-dried at low temperature to obtain nanocellulose airgel; by chemical vapor deposition, THFOS is used to treat the surface of the obtained nanocellulose airgel Lyophobic modification was carried out to finally obtain super-amphiphobic nano-cellulose airgel, and the average contact angles of water, castor oil, and hexadecane of the obtained super-amphiphobic nano-cellulose airgel reached 166°, 157°, 150° °, has the common characteristics of super amphiphobic materials such as waterproof and oil repellent, and has good industrial application prospects.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and more specifically, relates to a preparation method of super amphiphobic nano-cellulose airgel. Background technique [0002] Nanocellulose airgel is obtained by replacing the water in the gel without changing the gel network and volume. It is currently known as a solid material with ultra-light weight and high porosity. With unique properties such as high specific surface area, low thermal conductivity, high adsorption, and low dielectric constant, it is considered to be the third generation of emerging airgel after inorganic aerogel and synthetic polymer aerogel. Thermal materials, adsorption materials, sustained release of drugs, sensors, energy storage and other fields are widely used. [0003] There are a large number of free hydroxyl groups at the C2, C3, and C6 positions on the surface of nanocellulose. The strong polarity of hydroxyl groups makes nanocellulose easy to absorb...

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): C08J9/36C08J9/28C08L1/04C08K3/36
CPCC08J9/36C08J9/28C08J2205/026C08J2301/04C08J2201/0504C08K3/36C08K2201/011
Inventor 吴伟兵冯鹤丽左克曼戴红旗
Owner NANJING FORESTRY UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com