Cellulose foam material and method for improving tensile strength of cellulose foam material

A cellulose foam and tensile strength technology, applied in the field of cellulose foam materials, can solve the problems of poor mechanical properties, violation of sustainable development, easy to be broken, etc., to maximize structural strength and improve the effect of market application.

Active Publication Date: 2016-10-12
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, comprising the steps of:

[0024] step 1

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

[0026] Dealkalization solution: Neutralization, washing, dehydration and drying are carried out to obtain hydrophilic cotton fibers with a humidity of 15.43%.

[0027] step 2

[0028] soak: Add alkaline cotton fiber to a 3.50% viscose solution of methyl fiber for soaking, the soaking temperature is 10°C, and the soaking bath ratio is 1:150;

[0029] Dehydration: After soaking, carry out centrifugation and deliquification to obtain cotton fibers treated with 3.5% viscose solution, and the content of hydrophilic cotton fibers is 13.12%.

[0030] step 3

[0031] mix: Take by weighing 12% vi...

Embodiment 2

[0034] Example 2 A method for improving the tensile strength of cellulose foam, comprising the steps of:

[0035] step 1

[0036] Lye treatment: Weigh 2.80kg of hemp fiber with a length of 60-70cm in dry weight, put it into lye with a concentration of 11% sodium hydroxide, the soaking bath ratio is 1:50, the soaking temperature is 100°C, and the soaking time is 40min.

[0037] Dealkalization solution: After finishing the treatment, carry out neutralization, cleaning, dehydration and drying to obtain hydrophilic hemp fiber, and its humidity is 0.12%;

[0038] step 2

[0039] soak: Add the hydrophilic hemp fiber to the 2.0% viscose solution of methyl cellulose for soaking, the soaking temperature is 5°C, and the soaking bath ratio is 1:250;

[0040] Dehydration: After the immersion, centrifugal deliquoring was carried out to obtain hemp fiber treated with 2.0% viscose solution, and the hydrophilic hemp fiber content was 21.96%.

[0041] step 3

[0042]...

Embodiment 3

[0045] Example 3 A method for improving the tensile strength of cellulose foam, comprising the steps of:

[0046] step 1

[0047] Lye treatment: Weigh 0.7 kg of dry weight of cotton fiber with a length of 10-20 cm and 0.7 kg of dry weight of hemp fiber with a length of 60-70 cm. 120min.

[0048] Dealkalization solution: After the treatment, neutralize, wash, centrifuge and dry to obtain hydrophilic cotton and linen mixed fibers with a humidity of 29.78%;

[0049] step 2

[0050] soak: Add the hydrophilic cotton and linen mixed fiber into the 5.00% viscose solution of methyl cellulose for soaking, the soaking temperature is 15°C, and the soaking bath ratio is 1:50;

[0051] Dehydration: After soaking, carry out centrifugation and deliquification to obtain 5.0% viscose solution-treated cotton and linen fibers, and the content of hydrophilic cotton and linen mixed fibers is 4.07%

[0052] step 3

[0053] mix:Take by weighing 10% viscose solution of m...

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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 expansion, 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 foamed materials will continue to increase. Therefore, the large-scale industrial production process of cellulose foamed materials needs to be researched and developed. However, cellulose foam materials have poor mechanical properties, are not resistant to friction, are easily broken, and have low cost performance, so their application fields are limited. [0003] The US2495237 patent uses low-concentration viscose solution to pretreat the reinforcing fib...

Claims

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Application Information

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Patent Type & Authority Applications(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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