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A method for preparing the surface of an environment-responsive superhydrophobic-hydrophilic material

A technology of environmentally responsive and hydrophilic materials, which is applied in the field of preparation of the surface of environmentally responsive superhydrophobic-hydrophilic materials, can solve problems such as difficult large-scale production, complicated processes, and damage to the original properties of materials, so as to achieve the goal of not being easily polluted and producing The effect of simple process and low cost

Active Publication Date: 2021-01-15
安卜伦东艺设文化传播(北京)有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are still many problems in the preparation of superhydrophobic surfaces, such as complex preparation process, difficulty in large-scale production, weak durability and resistance to external environmental damage, damage to the original properties of materials, etc., and the prepared superhydrophobic wood has only a single Superhydrophobic properties cannot meet the needs of daily life. Therefore, how to improve the environmental responsiveness of superhydrophobic materials has become a research hotspot for new-generation materials.

Method used

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  • A method for preparing the surface of an environment-responsive superhydrophobic-hydrophilic material
  • A method for preparing the surface of an environment-responsive superhydrophobic-hydrophilic material
  • A method for preparing the surface of an environment-responsive superhydrophobic-hydrophilic material

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preparation example Construction

[0027] The invention provides a method for preparing the surface of an environment-responsive superhydrophobic-hydrophilic material, which is specifically implemented according to the following steps:

[0028] Step 1. Using styrene, acrylic acid, and methyl methacrylate as monomers, tetrahydrofuran as solvent, and azobisisobutyronitrile as initiator, react at 65°C for 2.5 hours, and precipitate and dry with n-hexane, that is, undergo traditional free radical polymerization A random polymer is obtained;

[0029] In step 1, the molar ratio of styrene, acrylic acid, methyl methacrylate, tetrahydrofuran and azobisisobutyronitrile is 1:1-2:1:3:0.05.

[0030] Step 2. The random polymer is dissolved in methanol to obtain a polymer methanol solution. The surface of the material is treated with the polymer methanol solution. After the surface of the treated material is washed with methanol, it is placed in an oven and dried to obtain an environment-responsive superhydrophobic-philic s...

Embodiment 1

[0057] Step 1. Using styrene, acrylic acid, and methyl methacrylate as monomers, tetrahydrofuran as solvent, and azobisisobutyronitrile as initiator, react at 65°C for 2.5 hours, and precipitate and dry with n-hexane, that is, undergo traditional free radical polymerization A random polymer is obtained;

[0058] In step 1, the molar ratio of styrene, acrylic acid, methyl methacrylate, tetrahydrofuran and azobisisobutyronitrile is 1:1:1:3:0.05.

[0059] Step 2: Dissolve the random polymer in methanol to obtain a polymer methanol solution, disperse it ultrasonically, soak the cotton cloth with the polymer methanol solution for 1 hour, take out the cotton cloth and wash it three times with methanol, put it in a vacuum drying oven, and pump it at room temperature. After vacuuming to -0.8kPa, dry for 24 hours to obtain an environment-responsive superhydrophobic-hydrophilic material surface;

[0060] The concentration of the random polymer in the polymer methanol solution in step 2...

Embodiment 2

[0062] Step 1. Using styrene, acrylic acid, and methyl methacrylate as monomers, tetrahydrofuran as solvent, and azobisisobutyronitrile as initiator, react at 65°C for 2.5 hours, and precipitate and dry with n-hexane, that is, undergo traditional free radical polymerization A random polymer is obtained;

[0063] In step 1, the molar ratio of styrene, acrylic acid, methyl methacrylate, tetrahydrofuran and azobisisobutyronitrile is 1:2:1:3:0.05.

[0064] Step 2. Dissolve the random polymer in methanol to obtain a polymer methanol solution, disperse it ultrasonically, soak the wood with the polymer methanol solution for 7 hours, take out the wood and wash it with methanol three times, put it in a vacuum drying oven, and pump it at room temperature. After vacuuming to -0.8kPa, dry for 24 hours to obtain an environment-responsive superhydrophobic-hydrophilic material surface;

[0065] The concentration of the random polymer in the polymer methanol solution in step 2 is 70mg / 100mL....

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Abstract

The invention discloses a preparation method of an environmentally responsive superhydrophobic-hydrophilic material surface. The method is concretely implemented according to the steps as follows: step I, taking styrene, acrylic acid and methyl methacrylate as monomers, tetrahydrofuran as a solvent and azodiisobutyronitrile as an initiating agent, reacting for 2.5 h at 65 DEG C, and precipitatingand drying through normal hexane, i.e, through traditional free radical polymerization, to obtain an random polymer; and step II, enabling the random polymer to be dissolved in methyl alcohol to obtain a polymer methyl alcohol solution, performing ultrasonic dispersion, treating a material surface by using the polymer methyl alcohol solution, enabling the material surface to be washed by methyl alcohol, and then putting in an oven to be dried to obtain the environmentally responsive superhydrophobic-hydrophilic material surface. According to the preparation method of the environmentally responsive superhydrophobic-hydrophilic material surface, reversible conversion among hydrophobicity-superhydrophobicity-hydrophilia can be realized by the environmentally responsive material surface, the conversion times can be as many as a few hundreds, and the environmentally responsive superhydrophobic-hydrophilic material surface has strong durability and external environment damage capability resistance.

Description

technical field [0001] The invention belongs to the technical field of material surface modification, and in particular relates to a method for preparing the surface of an environment-responsive superhydrophobic-hydrophilic material. Background technique [0002] Commonly used traditional materials, such as cotton cloth, wood, wood-plastic, paper, etc., play an extremely important role in production and life, such as clothing industry, construction industry, furniture industry, books and newspapers, etc. However, due to the obvious moisture absorption of these traditional materials, if they are placed in an environment with high humidity for a long time, mildew and corrosion will occur, and their dimensional stability cannot be guaranteed, which greatly reduces the material quality. service life. Superhydrophobic means that the contact angle between the surface of the material and water is greater than 150°, the rolling angle is less than 10°, and it will not be wetted by w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F212/08C08F220/06C08F220/14D06M15/263D21H19/20B27K3/02B27K3/50B27K5/00B27K5/04D06M101/06
CPCB27K3/02B27K3/50B27K5/0075B27K5/04C08F212/08C08F220/06C08F220/14D06M15/233D06M15/263D06M2101/06D21H19/20
Inventor 侯成敏王宝虎孔雪琪王妮杜小巧党卫朱政
Owner 安卜伦东艺设文化传播(北京)有限责任公司
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