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Method for preparing super-hydrophobic nano modified cellulose material

A technology for modifying cellulose and superhydrophobic, which is applied in dry-cleaning fiber products, fiber treatment, plant fibers, etc. It can solve the problems of temperature control and other problems, and achieve the effects of toughness and mechanical strength, wide sources, and simple and easy operation methods

Inactive Publication Date: 2010-04-14
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the conditions used, the temperature needs to be controlled, and the modified low surface energy molecular layer is mostly micron level.

Method used

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  • Method for preparing super-hydrophobic nano modified cellulose material
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  • Method for preparing super-hydrophobic nano modified cellulose material

Examples

Experimental program
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Effect test

Embodiment 1

[0032] 1) Toluene and ethanol with a volume ratio of 1:1 were used as solvents to prepare a tetrabutyl titanate solution with a concentration of 100 mM, and stirred at room temperature for 1 hour.

[0033] 2) Place the commonly used quantitative filter paper in the suction filter device, rinse the filter paper with ethanol for 2 to 3 times, and vacuum dry it.

[0034] 3) Add 10 mL of tetrabutyl titanate solution in step 1) to the suction filtration device in step 2), and let it stand for 2 to 3 minutes, which is the deposition process.

[0035] 4) Low vacuum until the liquid level of tetrabutyl titanate is slightly higher than the surface of the filter paper, quickly add ethanol to rinse for 2 to 3 times, let it stand for 2 to 3 minutes, filter with low vacuum, and then add pure water to rinse for 2 to 3 times 3 times, let it stand for about 3 minutes, this is the hydrolysis process, and vacuum dry after hydrolysis.

[0036] 5) The liquid level in steps 3) and 4) should alway...

Embodiment 2

[0043] After the water drop is placed on the surface of the superhydrophobic nano-modified cellulose material prepared in Example 1 for different times, its contact angle is measured, as shown in the attached Figure 5 The relationship curve between the contact angle value and time is shown, and it is found that the contact angle value on the surface of the superhydrophobic nano-modified cellulose material remains basically unchanged with time. After being placed at room temperature for more than ten months, there is no change in the contact angle value, and the superhydrophobicity is well maintained.

Embodiment 3

[0045] The change of the contact angle value of the liquid droplets of different pH values ​​on the surface of the superhydrophobic nano-modified cellulose material prepared in Example 1 is shown in the attached Figure 6 As shown, within the scope of error tolerance, the contact angle values ​​of droplets on the surface of the superhydrophobic nano-modified cellulose material with different pH values ​​(pH=1.0, 3.0, 5.0, 7.0, 9.0, 11.0, 13.0) are basically the same (about is 155°), its contact angle value basically does not change, and it has long-lasting chemical stability.

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Abstract

The invention relates to a method for preparing a super-hydrophobic nano modified cellulose material, which comprises the following steps: adopting tetrabutyl titanate as a precursor, adopting a natural cellulose fiber as a substrate substance and depositing a nano-layer titanium dioxide film on the surface of the natural cellulose fiber by a sol-gel method; and then self-assembling a silane single layer containing long chain alkyl to obtain the super-hydrophobic nano modified cellulose material. The nano modified cellulose material has obvious super-hydrophobicity, durable chemical stability and self-cleaning capacity and wide application prospect in the production of the fiber materials for preventing water, damp, dirt, dust, and the like in a textile industry.

Description

technical field [0001] The invention relates to a nano-modified cellulose material with superhydrophobic properties and a preparation method thereof. Background technique [0002] The preparation process of superhydrophobic materials has aroused great interest of many researchers after entering the 21st century, mainly based on the superhydrophobic properties of these superhydrophobic materials and the potential application of self-cleaning ability of moisture resistance, antifouling and dust resistance. Regarding the "lotus leaf effect" in nature, in 1997, German biologists Neinhuis and Barthlott learned that the self-cleaning ability of lotus leaves comes from the unique micro-nano structure on the surface of lotus leaves, namely milk Surface microstructures formed by protrusions and nanostructures formed by wax crystals. This special micro-nano structure greatly reduces the contact area between the surface of the lotus leaf and other substances, so that other substances ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M11/46D06M13/513D06L1/08D06M101/06
Inventor 黄建国李素静
Owner ZHEJIANG UNIV
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