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

A kind of preparation method of superhydrophobic recycled paper

A super-hydrophobic and recycled paper technology, applied in papermaking, paper recycling, waste paper processing, etc., can solve the problems of papermaking industry pollution and energy consumption, unusable packaging and storage, paper loss of use value, etc., to achieve good internal and external consistency, Good water repellency and good writing effect

Active Publication Date: 2017-05-24
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a convenient, easy, and environmentally friendly preparation method for superhydrophobic recycled paper, so as to solve the problems that paper loses its use value when it encounters water, cannot be used for outdoor packaging and storage, and the paper industry has serious pollution and energy consumption.

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 superhydrophobic recycled paper
  • A kind of preparation method of superhydrophobic recycled paper
  • A kind of preparation method of superhydrophobic recycled paper

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (1) Preparation of inorganic superhydrophobic filler: solution A: ethyl orthosilicate was added to methanol (V:V=1:2), and stirred for 5 minutes. Solution B: add ammonia water 0.02 (M) to methanol (V:V=15:20). Mix solution A and solution B (V:V=30:35). The pH of the mixture was adjusted to 5 with hydrochloric acid (0.1 M). 0.02 M ammonia water was added dropwise to the system to adjust the pH to 9, and aged for 10 hours to obtain a white opaque gel. The obtained gel was transferred to a reaction kettle, n-hexane and hexamethyldisilazane modifier were added, the volume ratio of the three was 12:20:3, and then reacted at 80°C for 10 h. Then suction filter and wash with n-propanol to obtain superhydrophobic silica gel. The obtained gel was dried at 60 °C for 6 h to remove the solvent and residual reactants, and then ground to obtain the inorganic superhydrophobic filler.

[0036] (2) Preparation of polydopamine-cellulose: The waste paper fragments were immersed in deio...

Embodiment 2

[0039] (1) Preparation of inorganic superhydrophobic filler: solution A: add ethyl orthosilicate to methanol (V:V=1:2), and stir for 10 minutes. Solution B: add ammonia water 0.02 (M) to methanol (V:V=15:20). Mix solution A and solution B (V:V=30:35). The pH of the mixture was adjusted to 5 with hydrochloric acid (0.1 M). 0.02 M ammonia water was added dropwise to the system to adjust the pH to 9, and aged for 12 hours to obtain a white opaque gel. The obtained gel was transferred to a reaction kettle, n-hexane and hexamethyldisilazane modifier were added, the volume ratio of the three was 12:20:3, and then placed at 80°C for 14 h. Then suction filter and wash with n-propanol to obtain superhydrophobic silica gel. The obtained gel was dried at 60 °C for 6 h to remove the solvent and residual reactants, and then ground to obtain the inorganic superhydrophobic filler.

[0040] (2) Preparation of polydopamine-cellulose: The waste paper fragments were immersed in deionized wat...

Embodiment 3

[0043](1) Preparation of inorganic superhydrophobic filler: solution A: add ethyl orthosilicate to methanol (V:V=1:2), and stir for 5 minutes. Solution B: add ammonia water 0.02 (M) to methanol (V:V=15:20). Mix solution A and solution B (V:V=30:35). The pH of the mixture was adjusted to 5 with hydrochloric acid (0.1 M). 0.02 M ammonia water was added dropwise to the system to adjust the pH to 9, and aged for 11 hours to obtain a white opaque gel. The obtained gel was transferred to a reaction kettle, n-hexane and hexamethyldisilazane modifier were added, the volume ratio of the three was 12:20:3, and then placed at 80°C for 12 h. Then suction filter and wash with n-propanol to obtain superhydrophobic silica gel. The obtained gel was dried at 60 °C for 8 h to remove the solvent and residual reactants, and then ground to obtain the inorganic superhydrophobic filler.

[0044] (2) Preparation of polydopamine-cellulose: The waste paper fragments were immersed in deionized water...

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
contact angleaaaaaaaaaa
angleaaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for preparing super-hydrophobic recycled paper. The method comprises the following steps: adding silicate ester and ammonia water into a polar solvent to obtain a solution A and a solution B, mixing the solution A and the solution B, adjusting the pH of the mixed solution to 5 with hydrochloric acid, adjusting the pH to 8-9 with an alkali catalyst, and aging to obtain opaque gel; adding the opaque gel into normal hexane and phenylsilylene modifiers for reacting, performing suction filtration, cleaning to obtain super-hydrophobic silica gel, drying the super-hydrophobic silica gel, and grinding to obtain inorganic super-hydrophobic filler; soaking waste paper into deionized water, stirring to obtain primary pulp fiber, adjusting the pH to 8-9 with a NaOH solution, adding dopamine powder, stirring, performing suction filtration, and cleaning to obtain poly-dopamine-cellulose; dispersing the poly-dopamine-cellulose into ethanol, stirring, adding the inorganic super-hydrophobic silica filler, stirring at the room temperature, performing suction filtration, washing, drying the obtained fiber, and laminating the fiber into paper. The super-hydrophobic recycled paper has water-repellency and waterproofness functions.

Description

technical field [0001] The invention relates to a method for preparing superhydrophobic recycled paper, belonging to the technical field of superhydrophobic material preparation. Background technique [0002] Inspired by nature, superhydrophobic surfaces have gradually attracted people's attention, such as lotus leaf surfaces, butterfly wings, water strider legs, etc., are good representatives. A superhydrophobic surface generally refers to a material surface with a contact angle of more than 150° to water and a rolling angle of less than 10°. Superhydrophobic surfaces have many unique and excellent surface properties: hydrophobicity, self-cleaning, anti-corrosion, anti-icing, anti-fog and other properties, making them have great application prospects in many fields. [0003] Water has always been a paper product killer. Once the paper is wetted, it loses its strength, writing and aesthetics. Superhydrophobic paper can solve this problem, because of its good waterproof fu...

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): D21H21/16D21H17/68D21H17/69
CPCD21B1/32D21C1/06D21C5/02D21H13/02D21H13/38Y02W30/64
Inventor 郭志光司一帆
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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