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A kind of cellulose foam material and the method for improving the tensile strength of cellulose foam material

A technology of cellulose foam and tensile strength, applied in the field of cellulose foam materials, can solve problems such as poor mechanical properties, violation of sustainable development, and unspecified dehydration degree of low-viscosity viscose solution, etc., to maximize structural strength , Improve the effect of market application range

Active Publication Date: 2018-05-15
潍坊欣龙生物材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the mechanical properties of cellulose foam materials are poor, not resistant to friction, easy to be broken, and the cost performance is low, so its application fields are limited.
[0003] The US2495237 patent uses low-concentration viscose solution to pretreat the reinforcing fiber to increase the tensile strength of the cellulose foam material to 9.8-19.6KPa, but the tensile strength still cannot meet the market requirements. In addition, the patent does not clearly propose low-viscosity viscose The degree of dehydration of the solution, and it is not suitable for raw cotton fibers; the US2914493 patent uses polyester fibers mixed with cellulose fibers to increase the tensile strength of cellulose foam materials, but polyester fibers are not environmentally friendly and violate the theme of sustainable development today

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Example 1 A method for improving the tensile strength of cellulose foam material includes the following steps:

[0024] step 1

[0025] Lye treatment: Weigh 5.60kg dry weight of cotton fiber with a length of 20-30cm, put in 22% lye with sodium hydroxide concentration, treatment bath ratio of 1:30, temperature of 75℃, and soaking time of 80min.

[0026] De-alkali liquid: neutralize, clean, de-liquid and dry to obtain hydrophilic cotton fiber with a humidity of 15.43%.

[0027] Step 2

[0028] Soaking: Add alkaline cotton fiber to nail fiber 3.50% viscose solution for soaking, soaking temperature is 10℃, soaking bath ratio 1:150;

[0029] Deliquoring: After the soaking is completed, centrifugal deliquoring is performed to obtain cotton fiber treated with 3.5% viscose solution. The content of hydrophilic cotton fiber is 13.12%.

[0030] Step 3

[0031] Mixing: Weigh the 12% viscose solution of nail fiber content and the cotton fiber treated with 3.5% viscose solution to mix, and the dr...

Embodiment 2

[0034] Example 2 A method for improving the tensile strength of cellulose foam material includes the following steps:

[0035] step 1

[0036] Alkali treatment: weigh 2.80kg dry weight of hemp fiber with a length of 60-70cm, put in 11% lye with sodium hydroxide concentration, immersion bath ratio 1:50, immersion temperature 100℃, immersion time 40min.

[0037] De-alkali solution: After the treatment, neutralization, cleaning, deliquoring and drying are performed to obtain hydrophilic hemp fiber with a humidity of 0.12%;

[0038] Step 2

[0039] Soaking: add hydrophilic hemp fiber to 2.0% viscose solution of nail fiber for soaking, soaking temperature is 5℃, soaking bath ratio 1:250;

[0040] Deliquoring: After the immersion is completed, centrifugal deliquoring is performed to obtain the hemp fiber treated with 2.0% viscose solution. The hydrophilic hemp fiber content is 21.96%.

[0041] Step 3

[0042] Mixing: Weigh 14% viscose solution with nail fiber content and mix the hemp fiber treat...

Embodiment 3

[0045] Example 3 A method for improving the tensile strength of cellulose foam material includes the following steps:

[0046] step 1

[0047] Lye treatment: weigh 0.7kg of cotton fiber with a length of 10-20cm and 0.7kg of hemp fiber with a dry weight of 60-70cm, and put in 33% sodium hydroxide lye at a bath ratio of 1:10 and a temperature of 50℃ , The processing time is 120min.

[0048] De-alkali solution: After the treatment, neutralization, cleaning, centrifugation and drying are carried out to obtain hydrophilic cotton and linen mixed fiber, the humidity of which is 29.78%;

[0049] Step 2

[0050] Soaking: Add the hydrophilic cotton and linen mixed fiber to the nail fiber 5.00% viscose solution for soaking, the soaking temperature is 15℃, and the soaking bath ratio is 1:50;

[0051] Deliquoring: After the soaking is completed, centrifugal deliquoring to obtain cotton and linen fiber treated with 5.0% viscose solution. The content of hydrophilic cotton and linen mixed fiber is 4.07...

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Abstract

The invention provides a cellulose foam material. The tensile strength of the foam material is 0.30-1.60 MPa. The invention further provides a method for improving the tensile strength of the cellulose foam material. The method comprises an alkali processing step. The alkali processing step includes the sub-step that natural cellulose fibers are added to sodium hydroxide for treatment. The natural cellulose fibers are natural cotton and hemp fibers, and the length of the natural fibers is 10-70 mm. The prepared cellulose foam material is higher in tensile strength, and the tensile strength is up to 0.30-1.60 MPa and is far higher than the tensile strength of a foam material in the prior art, and the market application range of the foam material can be greatly widened. In the preparation process of the cellulose foam material, the raw materials are natural and biodegradable and have the environmentally friendly and environmental-pollution-free characteristics.

Description

Technical field [0001] The invention relates to a cellulose foam material and a method for improving the tensile strength of the cellulose foam material, belonging to the field of cellulose foam materials. Background technique [0002] Cellulose foam material has biodegradability, oil absorption, strong water absorption and water swelling, so it can be used for civil cleaning, industrial cleaning and water engineering. As people's awareness of environmental protection continues to increase, the market demand for cellulose foam materials will continue to increase, so the large-scale industrial production process of cellulose foam materials needs to be researched and developed. However, the cellulose foam material has poor mechanical properties, is not resistant to friction, is easily broken, and has low cost performance, so its application fields have limitations. [0003] The US2495237 patent uses a low-concentration viscose solution to pretreat the reinforcing fibers to increase ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08B9/04C08B1/08C08J9/00
CPCC08B1/08C08B9/04C08J9/00C08J2301/22
Inventor 万和军贾守江刘长军马君志岳本增马清涛
Owner 潍坊欣龙生物材料有限公司
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