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A waterproof and moisture-permeable functional cellulose-based porous composite material and its preparation and application

A technology of porous materials and composite materials, which is applied to functional porous composite materials and the fields of their preparation and application, can solve the problems of difficult recycling, non-degradability, and high production costs of products, and achieve enhanced water and gas transport capacity, optimal flexibility and mechanical properties. , good flexibility

Active Publication Date: 2021-07-02
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide the preparation and application of a waterproof and moisture-permeable functional cellulose-based porous composite material, which overcomes the defects of high production cost in the prior art, difficulty in recycling and non-degradable products in the later stage, and the porous material of the present invention Part of it is a three-layer porous structure of upper layer, middle layer and bottom layer. Each layer has different pore diameters and water contact angles, and is finally prepared by different processes.

Method used

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  • A waterproof and moisture-permeable functional cellulose-based porous composite material and its preparation and application
  • A waterproof and moisture-permeable functional cellulose-based porous composite material and its preparation and application

Examples

Experimental program
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Effect test

Embodiment 1

[0040] First prepare a single-layer hydrophobic cellulose porous material. The specific preparation process is: take a cellulose nanowire suspension with a solid content of 1wt% (Tianjin Wood Fairy Co., Ltd.), the length of the cellulose nanowire is 1 μm, and the diameter is 20nm, and then add formazan Trimethoxysilane (Shanghai Sinopharm Chemical Reagent Co., Ltd., CAS: 1185-55-3), wherein the mass ratio of cellulose nanowires to methyltrimethoxysilane is 1:0.5. After stirring at room temperature for 2 hours, the mixed solution was frozen with liquid nitrogen for 10 minutes and then transferred to a freeze dryer. The freeze-drying temperature was -50°C and the freeze-drying time was 30 hours. ℃ oven for 1h. Immerse the prepared cellulose porous material in a polyurethane solution with a solid content of 4wt% (Jining Baiyi Chemical Co., Ltd., HK3100), wherein the mass proportion of the cellulose porous material is 10wt%, and the mass proportion of the polyurethane impregnation...

Embodiment 2

[0044] First prepare a single-layer hydrophobic cellulose porous material, the specific preparation process is: take 2wt% solid content of cellulose nanowire suspension (Tianjin Wood Fairy Co., Ltd.), the cellulose nanowire length is 20 μm, the diameter is 40nm, and then add formazan Methyldiethoxysilane, wherein the mass ratio of cellulose nanowires and methyldiethoxysilane is 1:1. After stirring for 4 hours at room temperature, the mixed solution was frozen with liquid nitrogen for 10 minutes and then transferred to a freeze dryer. The freeze-drying temperature was -50°C and the freeze-drying time was 40 hours. ℃ oven placed 2h. Immerse the prepared cellulose porous material in a polyurethane solution with a solid content of 8wt% (Jining Baiyi Chemical Co., Ltd., HK3100), wherein the mass proportion of the cellulose porous material is 20wt%, and the mass proportion of the polyurethane impregnation solution is 78wt%. , while adding 2wt% mass fraction of the three-proof finis...

Embodiment 3

[0048] First prepare a single-layer hydrophobic cellulose porous material, the specific preparation process is: take 1.2wt% solid content of cellulose nanowire suspension (Tianjin Wood Fairy Co., Ltd.), the cellulose nanowire length is 10 μm, the diameter is 30nm, and then add Dimethyldivinylsilane, wherein the mass ratio of cellulose nanowires to dimethyldivinylsilane is 1:0.6. After stirring at room temperature for 2 hours, the mixed solution was frozen with liquid nitrogen for 10 minutes and then transferred to a freeze-drying machine. The freeze-drying temperature was -50°C and the freeze-drying time was 35 hours. ℃ oven for 1h. Immerse the prepared cellulose porous material in a polyurethane solution with a solid content of 5wt% (Jining Baiyi Chemical Co., Ltd., HK3100), wherein the mass proportion of the cellulose porous material is 15wt%, and the mass proportion of the polyurethane impregnation solution is 81wt%. , while adding 4wt% mass fraction of the three-proof fin...

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Abstract

The invention relates to a waterproof and moisture-permeable functional cellulose-based porous composite material and its preparation and application. The composite material includes, from bottom to top, a bottom layer of a hydrophobic cellulose porous material, a middle layer of an amphiphilic cellulose porous material, and a superphilic Water cellulosic porous material upper layer. When the composite material obtained in the present invention is applied in the field of clothing, it not only exerts waterproof and moisture-permeable functions, but also has excellent thermal insulation effects.

Description

technical field [0001] The invention belongs to the field of functional porous composite materials and their preparation and application, in particular to a waterproof and moisture-permeable functional cellulose-based porous composite material and its preparation and application. Background technique [0002] Waterproof and moisture-permeable functional material is a new type of functional material with good waterproof and moisture-permeable properties. This kind of material can be applied in many harsh environmental conditions. When it is used as clothing fabric, it can protect the human body from the influence of violent wind and rain and can transmit water vapor to the external environment in time, thereby greatly improving the wearing comfort of clothing; at the same time In the medical and chemical industry, waterproof and moisture-permeable functional materials can also effectively block the direct contact between toxic liquid reagents and the human body, thereby avoid...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B23/08B32B3/24B32B27/40B32B33/00B29D7/01A41D31/02A41D31/102D06M15/564D06M15/256D06M13/513D06M15/61D06M101/06
CPCA41D31/02A41D31/102B29D7/01B32B3/266B32B23/08B32B27/40B32B33/00B32B2250/03B32B2307/724B32B2307/7265B32B2437/00D06M13/513D06M15/256D06M15/564D06M15/61D06M2101/06D06M2200/12D06M2200/50
Inventor 隋晓锋王亚停冯雪凌王碧佳毛志平
Owner DONGHUA UNIV
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