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Preparation method and application of a waterproof and heat-insulating coating agent

A technology of thermal insulation coating and solvent, applied in textiles and papermaking, etc., can solve the problems of increasing the thickness and weight of fabrics, human discomfort, temperature difference of thermal insulation effect, etc., to prevent discomfort, simple preparation method, and increase thermal insulation rate. Effect

Active Publication Date: 2022-03-11
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the "Preparation and Performance Research of SiO2 Airgel Thermal Insulation Coated Fabric" by He Xiangmei of Donghua University, SiO 2 The airgel is dispersed in a polyacrylate adhesive, and finally coated on the cotton fabric. The temperature difference of the obtained fabric insulation effect is 6.8°C lower than that of the original fabric, but the thermal conductivity of the polyacrylic resin is much higher than that of the fabric. And air permeability and moisture permeability are relatively poor, long-term wearing will cause human discomfort; in the patent CN 209320415 U, Shubo (Shanghai) Nano Technology Co., Ltd. invented a kind of airgel thermal clothing composite fabric, which includes heat storage layer, Cushioning layer, thermal insulation layer and protective layer, although this kind of clothing fabric can achieve the characteristics of windproof, rainproof and warm-keeping, but the thickness and weight of the fabric cannot be avoided due to the multi-layer, which brings inconvenience to people's wearing, homework or sports.

Method used

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  • Preparation method and application of a waterproof and heat-insulating coating agent

Examples

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Embodiment 1

[0032] This embodiment provides a method for preparing a waterproof and heat-insulating coated textile, comprising the following steps:

[0033] (1) Dissolve 7g of PVDF-HFP powder in 17g of acetone, stir at 60°C at a speed of 300r / min for 40min, and fully dissolve to a clear and transparent PVDF-HFP solution.

[0034] (2) 6 g of water and 34 g of acetone were magnetically stirred and mixed uniformly to obtain a water / acetone mixture.

[0035] (3) Slowly add the water / acetone mixture obtained in step (2) dropwise into the PVDF-HFP solution that is being heated and stirred in step (1) and has been fully dissolved, and continue to maintain the temperature at 60°C at a speed of 300r / min Stir for 20 min to obtain post-treatment liquid.

[0036] (4) the hydrophobic SiO of 2wt% of aftertreatment liquid in step (3) 2 The airgel particles are added to the post-treatment solution obtained in step (3), and ultrasonically dispersed for 20 minutes to obtain a waterproof and heat-insulati...

Embodiment 2

[0039] This embodiment provides a method for preparing a waterproof and heat-insulating coated textile, comprising the following steps:

[0040] (1) Dissolve 3g of PVDF-HFP powder in 20g of acetone, stir at 40°C at a speed of 300r / min for 20min, and fully dissolve to a clear and transparent PVDF-HFP solution.

[0041] (2) 2 g of water and 10 g of acetone were magnetically stirred and mixed uniformly to obtain a water / acetone mixture.

[0042] (3) Slowly add the water / acetone mixture obtained in step (2) dropwise into the PVDF-HFP solution that is being heated and stirred in step (1) and has been fully dissolved, and continue to maintain at 40°C at a speed of 300r / min Stir for 40 min to obtain the post-treatment liquid.

[0043] (4) the hydrophobic SiO of 3wt% of aftertreatment liquid in step (3) 2 The airgel particles are added to the post-treatment liquid obtained in step (3), and ultrasonically dispersed for 15 minutes to obtain a waterproof and heat-insulating coating age...

Embodiment 3

[0046] This embodiment provides a method for preparing a waterproof and heat-insulating coated textile, comprising the following steps:

[0047] (1) Dissolve 5g of PVDF-HFP powder in 20g of acetone, stir at 50°C at a speed of 300r / min for 30min, and fully dissolve to a clear and transparent PVDF-HFP solution.

[0048] (2) 4 g of water and 21 g of acetone were magnetically stirred and mixed uniformly to obtain a water / acetone mixture.

[0049] (3) Slowly add the water / acetone mixture obtained in step (2) dropwise into the PVDF-HFP solution that is being heated and stirred in step (1) and has been fully dissolved, and continue to maintain the speed of 300r / min at 50°C Stir for 30 min to obtain post-treatment liquid.

[0050] (4) the hydrophobic SiO of 4wt% of aftertreatment liquid in step (3) 2 The airgel particles are added to the post-treatment solution obtained in step (3), and ultrasonically dispersed for 10 minutes to obtain a waterproof and heat-insulating coating agent. ...

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Abstract

The invention discloses a preparation method and application of a waterproof and heat-insulating coating agent. The present invention uses polyvinylidene fluoride-hexafluoropropylene (PVDF-HFP) and hydrophobic SiO 2 Using aerogel as a raw material, the waterproof and heat-insulating coating agent was prepared, and after the cotton fabric was treated with the coating agent, a waterproof and heat-insulating coated textile with significantly improved heat retention rate and hydrophobicity was obtained, and PVDF-HFP / hydrophobic SiO 2 The micro-nano composite micro-pores formed by the separation of aerogel particles in the water phase provide a channel for the water vapor emitted by the human body, and make it have good moisture permeability.

Description

technical field [0001] The invention relates to the field of composite materials, in particular to a preparation method and application of a waterproof and heat-insulating coating agent. Background technique [0002] When exercising or doing business outdoors, a waterproof and heat-insulating textile is necessary in the face of harsh rainy and cold weather conditions. At present, the existing waterproof and moisture-permeable textile technologies include microporous technology and non-porous hydrophilic technology. The non-porous hydrophilic technology utilizes the hydrophilic groups on the polymer chain, and the inner layer absorbs moisture and diffuses to the outer layer to achieve the purpose of moisture permeability. Because it is a non-porous design, it can have good water resistance, but compared with microporous technology, its moisture permeability needs to be improved; microporous technology is representative of biaxially stretched polytetrafluoroethylene to form m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06N3/04D06N3/00
CPCD06N3/047D06N3/0063D06N3/005D06N2209/065D06N2209/142D06N2209/126D06N2211/10
Inventor 常广涛綦淼王颖李若欣
Owner SUZHOU UNIV
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