Unlock instant, AI-driven research and patent intelligence for your innovation.

a kind of sio 2 Airgel/fiber heat insulation and antibacterial composite packaging material and preparation method

A composite packaging material and aerogel technology, applied in the field of packaging materials, can solve the problems of low strength, brittleness, and the inability of uniformly doped silica aerogel, and achieves low cost, simple preparation process, and broad application prospects. Effect

Active Publication Date: 2022-05-10
福州大学至诚学院
View PDF9 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, plastic film is a kind of packaging material, and there is no plastic film doped with silica airgel at present. This is because the density of silica airgel powder is very small, and it will float when mixed with any solvent. On the surface of the solvent, the silica airgel cannot be evenly doped into the plastic film; on the other hand, because the silica airgel has low strength and is brittle, and the plastic film is extremely thin, this extremely Thin features can easily destroy the structure of silica airgel

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 sio <sub>2</sub> Airgel/fiber heat insulation and antibacterial composite packaging material and preparation method
  • a kind of sio <sub>2</sub> Airgel/fiber heat insulation and antibacterial composite packaging material and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Step 1, mix tetraethoxysilane, water, absolute ethanol and 0.1mol / L hydrochloric acid in a molar ratio of 1:3:10:0.01, and then add aluminum silicate fibers with 1% tetraethoxysilane mass, Stir at room temperature and fully hydrolyze to obtain Sol A;

[0035] Step 2, put N-methylpyrrolidone and polyvinyl chloride into the reactor at a molar ratio of 1:5, and mix and stir at 170°C and 400r / min for 40min to prepare slurry B;

[0036] Step 3, mix sol A, slurry B and vanillin according to the mass ratio of 1:100:1 and place them in a freeze vacuum dryer, freeze at -10°C for 5 hours, and then freeze at -40°C and 20Pa Freeze for 16 hours to obtain a mixed solid, put the mixed solid into a twin-screw extruder, extrude and granulate it into a single-screw blow molding machine at a temperature of 130°C and a speed of 100r / min, and put it into a single-screw blow molding machine at a temperature of 170°C. Blow molding at a speed of 1000r / min to obtain SiO 2 Airgel / fiber thermal...

Embodiment 2

[0039] Step 1, mix tetraethoxysilane, water, absolute ethanol, and 0.05mol / L hydrochloric acid in a molar ratio of 1:10:50:0.1, and then add aluminum silicate fibers with 5% tetraethoxysilane mass, Stir at room temperature and fully hydrolyze to obtain Sol A;

[0040] Step 2, put N-methylpyrrolidone and polyvinyl chloride into the reactor at a molar ratio of 1:5, and mix and stir for 40 minutes at 180°C and 450r / min to prepare slurry B;

[0041]Step 3: Mix sol A, slurry B and vanillin in a mass ratio of 0.5:100:0.5 and place them in a freezer vacuum dryer, freeze at -15°C for 5 hours, and then freeze at -45°C and 20Pa Freeze for 16 hours to obtain a mixed solid, put the mixed solid into a twin-screw extruder, extrude and granulate it into a single-screw blow molding machine at a temperature of 150°C and a speed of 130r / min, and put it into a single-screw blow molding machine at a temperature of 180°C. Blow molding at a speed of 1000r / min to obtain SiO 2 Airgel / fiber thermal ...

Embodiment 3

[0044] Step 1, mix tetraethoxysilane, water, absolute ethanol and 0.08mol / L hydrochloric acid in a molar ratio of 1:7:30:0.05, and then add aluminum silicate fibers with 3% tetraethoxysilane quality, Stir at room temperature and fully hydrolyze to obtain Sol A;

[0045] Step 2, put N-methylpyrrolidone and polyvinyl chloride into the reactor at a molar ratio of 1:5, and mix and stir at 160°C and 350r / min for 40min to prepare slurry B;

[0046] Step 3, mix sol A, slurry B and vanillin in a mass ratio of 0.7:100:0.7 and place them in a freeze vacuum dryer, freeze at -12°C for 5 hours, and then freeze at -43°C and 20Pa Freeze for 16 hours to obtain a mixed solid, put the mixed solid into a twin-screw extruder, extrude and granulate it into a single-screw blow molding machine at a temperature of 140°C and a speed of 120r / min, and put it into a single-screw blow molding machine at a temperature of 160°C. Blow molding at a speed of 1000r / min to obtain SiO 2 Airgel / fiber thermal ins...

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
tensile strengthaaaaaaaaaa
tensile strengthaaaaaaaaaa
Login to View More

Abstract

The invention discloses a SiO 2 The invention discloses an airgel / fiber heat-insulating and antibacterial composite packaging material and a preparation method thereof, belonging to the field of packaging materials. The preparation method of the present invention comprises the following steps: step 1, uniformly mixing silicon source, water, alcohol, acid solution and fiber to obtain a sol; step 2, uniformly mixing N-methylpyrrolidone and polyvinyl chloride to obtain a slurry ; Step 3, mixing the sol and the slurry with the bacteriostatic components evenly and freeze-drying to obtain the mixture, then granulating and processing to obtain SiO 2 Airgel / fiber thermal insulation and antibacterial composite packaging materials. SiO prepared by the present invention 2 The airgel / fiber heat insulation and antibacterial composite packaging material is a film-like material, and its mechanical properties such as tensile strength, breaking strength, low-temperature elongation, and right-angle tear strength are equivalent to ordinary plastic films; and at the same time, it has heat insulation, The antibacterial function has broad application prospects in fruits, vegetables and food preservation.

Description

technical field [0001] The invention relates to the field of packaging materials, in particular to a SiO 2 Airgel / fiber thermal insulation and antibacterial composite packaging material and preparation method. Background technique [0002] Fruits, vegetables and food are prone to spoilage, so sufficient fresh-keeping measures should be taken during storage, transportation and sale of fruits, vegetables and food. At present, the fresh-keeping measures adopted for fruits, vegetables and food are mostly through cartons, foam boxes or cold storage. The plastic film on the outside of fruits and vegetables and food generally has no fresh-keeping function (although there are currently antibacterial plastic films, they are generally By modifying and grafting plastics to make them have antibacterial function, the process is complicated and expensive, and it is generally used in medical treatment, but not suitable for fruits, vegetables and food). However, the fresh-keeping function...

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): C08L27/06C08K7/26C08K7/10C08K5/13C08J5/18
CPCC08J5/18C08J2327/06C08K7/26C08K7/10C08K5/13
Inventor 张帆黄星雨陈亮杨懿汤婧雅
Owner 福州大学至诚学院