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Preparation method of medical cellulose sponge

A cellulose and sponge technology, applied in the field of preparation of cellulose medical sponges, can solve the problems of harming the environment, secondary pollution, trauma and wounds, etc., and achieve excellent antibacterial properties and tensile strength, simple manufacturing process, and low production cost. Effect

Active Publication Date: 2013-12-11
CHINA TEXTILE ACAD JIANGNAN BRANCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still some problems with this sponge: 1. All the added ingredients participate in the reaction, but some aldehydes will inevitably remain, which is harmful to the environment, and a large amount of chemical additives are added to the formula. If it is not washed, it will cause trauma and wound infection.
2. For the popular PVF synthetic sponges on the market, due to the low cost and no antibacterial effect, most of them are for one-time use, which is easy to generate a lot of medical waste and difficult to deal with.
If the post-finishing technology is used to add antibacterial agents, poor fastness will cause secondary pollution

Method used

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  • Preparation method of medical cellulose sponge

Examples

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Effect test

Embodiment 1

[0036] 1000 g of sisal was treated with compound enzymes at 45°C for 30 minutes, washed with water until neutral, crushed, and dried for later use. Mix the NMMO solution with a mass fraction of 50% and the urea solution with a mass fraction of 20% at a volume ratio of 1:1, adjust the temperature of the solution system to 10°C, add the treated fiber raw materials, and stir slowly at a stirring speed of 150rpm. After the fibers are completely dissolved, add 10 g of composite photocatalyst preparation, continue to cool down to 5°C, the offset is ±1°C, then add 30g of sponge pore-forming agent, the sponge pore-forming agent is sodium chloride, and increase the speed to 350rpm . Finally, all the solution is poured into the mold, shaped, boiled in immersion water to remove the pore forming agent and generate a sponge product.

[0037] In this example:

[0038] The composite photocatalyst preparation is obtained by the following preparation method: add 10 ml of a mixed solution of ...

Embodiment 2

[0041] 1000 g of Manila hemp was subjected to enzyme treatment at 45°C for 30 min, then washed with water until neutral, crushed, and dried for later use. Mix the NMMO solution with a mass fraction of 80% and the urea solution with a mass fraction of 5% at a volume ratio of 1:1, adjust the system temperature to 10°C, add the treated fiber raw materials, and stir slowly at a stirring speed of 120rpm. After the fibers are completely dissolved, add 30g of composite photocatalyst preparation, continue to cool down to 5°C, with an offset of ±1°C, then add 40g of sponge pore-forming agent, which is sodium sulfate, and increase the speed to 400rpm. Finally, all the solution is poured into the mold, shaped, boiled in immersion water to remove the pore forming agent and generate a sponge product.

[0042] In this example:

[0043]The composite photocatalyst preparation is obtained by the following preparation method: 10 ml of a mixed solution of butyl titanate and ethanol is added in ...

Embodiment 3

[0046] 1000 g of screened sisal and Manila hemp fiber wastes were treated with enzymes at 45°C for 30 minutes, washed with water until neutral, crushed, and dried for later use. Mix the NMMO solution with a mass fraction of 60% and the urea solution with a mass fraction of 10% at a volume ratio of 1:1, adjust the system temperature to 10°C, add treated fiber waste, and stir slowly at a stirring speed of 100rpm. After the fibers are completely dissolved, add 50g of composite photocatalyst preparation, continue to cool down to 5°C, and the offset is ±1°C. At this time, add 50g of sponge pore-forming agent, which is sodium nitrate, and increase the speed to 400rpm. Finally, all the solution is poured into the mold, shaped, boiled in immersion water to remove the pore forming agent and generate a sponge product.

[0047] In this example:

[0048] The composite photocatalyst preparation is obtained by the following preparation method: add 10 ml of a mixed solution of butyl titanat...

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Abstract

The invention discloses a preparation method of sponge, and particularly relates to a preparation method of medical cellulose sponge. The preparation method is characterized by comprising the following steps that a sisal hemp fiber or / and a manila hemp fiber serves or serve as a raw material or raw materials, and is / are subjected to enzyme treatment and water washing, and is / are smashed and dried for standby; a 50-60% NMMO (N-methylmorpholine oxide) solution and a 5% urea solution are mixed at a volume ratio of 1:1; the temperature of a mixed solution is adjusted to be 10-15 DEG C; the treated fiber is added, and stirred to be dissolved; an antibacterial agent is added and cooled to be 4-6 DEG C; a sponge pore-forming agent is added; all the solutions are poured into a mould, and formed; and a sponge product is generated. Compared with the traditional sponge, the hydroscopicity, the tensile strength, the antibacterial property, and the like of the sponge product prepared by the preparation method are improved significantly.

Description

[0001] Technical field: [0002] The invention relates to a medical sponge, in particular to a preparation method of a cellulose medical sponge. [0003] Background technique: [0004] At present, there are two main types of medical sponges: polyurethane sponge (PU) and polyvinyl formal (PVF). Since the country has not formulated the standard for medical sponges, the price of ordinary polyurethane sponges is extremely low. Its production process is similar to the production process of general industrial foam filling materials. It cannot be said that it meets the production requirements of sterile products. At the same time, due to its own network structure and the electrostatic effect of the outside world, the sponge can easily absorb dust particles and bacteria, causing serious initial pollution. Now the most widely used is PVF sponge, which is characterized by instantaneous siphon and high liquid retention capacity. Polyvinyl formal is used as the base material. In the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L1/02C08K3/22C08K3/28C08J9/26C08B1/00A61L15/28
Inventor 崔桂新李淑莉贾佳张孝南
Owner CHINA TEXTILE ACAD JIANGNAN BRANCH
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