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Bamboo raw powder/polyurethane composite film as well as preparation method and application thereof

A technology of polyurethane and composite film, applied in the field of composite film, can solve problems such as lack of absorption performance, and achieve the effect of easy promotion and simple and convenient process route

Pending Publication Date: 2021-05-14
泉州师范学院(石狮)生态智能织物工程技术研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of dressing is transparent and easy to observe, can keep the wound moist, requires less dressing changes, and relieves pain, but has almost no absorption performance, and is not suitable for wounds with excessive exudation. This problem is also a problem faced by current medical dressing membrane materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A preparation method of raw bamboo powder / polyurethane composite film, comprising the steps of:

[0024] 1) Freeze the bamboo waste at -20°C, and then grind it in a high-energy ball mill for 4 hours to prepare bamboo powder with a particle size of 15 μm to 30 μm;

[0025] 2) First add 10g of polyurethane to the three-hole flask, then pour 40g of solvent DMF, seal the three-hole flask and place it in a water bath at 50°C, heat and stir for 6 minutes, then add 1.2g of bamboo powder and 4.8 g additive PEG 200, the blend was stirred at a constant temperature of 25°C for 6 hours, then cooled, and allowed to stand for 1 day to defoam;

[0026] 3) Configure a glass plate with a smooth surface as the base material, wash and dry it and place it flat on the table, pour the prepared blend evenly on one end of the glass plate, and then wrap the two ends with insulating tape. Scrape the rod to the other end at a constant speed. After the blend is spread on the glass plate, quickly ...

Embodiment 2

[0030] A preparation method of raw bamboo powder / polyurethane composite film, comprising the steps of:

[0031] 1) Freeze the bamboo waste at -40°C, and then grind it in a high-energy ball mill for 6 hours to prepare bamboo powder with a particle size of 15 μm to 30 μm;

[0032] 2) First add 12g of polyurethane to the three-hole flask, then pour 39.9g of solvent DMF, seal the three-hole flask and place it in a water bath at 50°C, heat and stir for 6 minutes, then add 3.6g of bamboo powder and 4.8g of additive PEG 200, the blend was stirred at 35°C for 6 hours, then cooled, and allowed to stand for 2 days to defoam;

[0033] 3) Configure a glass plate with a smooth surface as the base material, wash and dry it and place it flat on the table, pour the prepared blend evenly on one end of the glass plate, and then wrap the two ends with insulating tape. Scrape the rod to the other end at a constant speed. After the blended solution is spread on the glass plate, quickly put the gl...

Embodiment 3

[0037] A preparation method of raw bamboo powder / polyurethane composite film, comprising the steps of:

[0038] 1) Freeze the bamboo waste at -30°C, and then grind it in a high-energy ball mill for 5 hours to prepare bamboo powder with a particle size of 15 μm to 30 μm;

[0039] 2) First add 12g of polyurethane to the three-hole flask, then pour 37.5g of solvent DMF, seal the three-hole flask and place it in a water bath at 50°C, heat and stir for 6 minutes, then add 6.0g of bamboo powder and 4.8g of additive PEG200, the blend was stirred at 30°C for 6 hours, then cooled, and allowed to stand for 3 days to defoam;

[0040] 3) Configure a glass plate with a smooth surface as the base material, wash and dry it and place it flat on the table, pour the prepared blend evenly on one end of the glass plate, and then wrap the two ends with insulating tape. Scrape the rod to the other end at a constant speed. After the blend is spread on the glass plate, quickly put the glass plate in...

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Abstract

The invention discloses a raw bamboo powder / polyurethane composite film as well as a preparation method and application thereof. The preparation method comprises the following steps: processing fibers into raw bamboo powder by adopting a grinding method, improving a polyurethane film by utilizing excellent hygroscopicity of the raw bamboo powder, and when the raw bamboo powder / polyurethane composite film is prepared, adding the raw bamboo powder into a blending solution by adopting an immersion precipitation phase inversion method, continuously performing stirring at a constant temperature to obtain a stable blending solution, performing standing for defoaming, then scraping the film, putting the film into a coagulating bath, and finally preparing the raw bamboo powder / polyurethane composite film; after the phase inversion process is finished, naturally performing airing to obtain the raw bamboo powder / polyurethane composite film. The raw bamboo powder / polyurethane composite film prepared by the method disclosed by the invention can be used as a medical film dressing, and can also be applied to the aspect of functional finishing and compounding of fabrics.

Description

technical field [0001] The invention relates to the technical field of composite membranes, in particular to a bamboo powder / polyurethane composite membrane and its preparation method and application. Background technique [0002] Compared with natural fiber cotton fiber, bamboo fiber has poor spinnability, low fineness, and high rigidity. Most of the "fallen bamboo" fibers are in the pre-treatment process of spinning. These non-spinnable fibers have relatively low use value and greatly increase the cost of the enterprise. Therefore, the comprehensive utilization of "fallen bamboo" fiber, the improvement of the comprehensive use of bamboo fiber, the increase of added value, and the reduction of enterprise cost have become urgent problems for bamboo fiber manufacturers to solve. [0003] At present, the research on moisturizing dressings mainly focuses on several categories such as films, hydrocolloids, hydrogels, foams, alginates, biofilms, and medical films. These types of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D69/12B01D69/02B01D67/00B01D71/48
CPCB01D71/10B01D71/48B01D67/0011B01D67/0002B01D69/02B01D69/12
Inventor 张宏杰林清清高紫欣陈倩简梦洁梁超
Owner 泉州师范学院(石狮)生态智能织物工程技术研究院
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