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Super-hydrophobic polystyrene film and preparation method thereof

A polystyrene film and super-hydrophobic technology, which is applied in the field of preparing super-hydrophobic polystyrene films, can solve the problems of difficult popularization and application, expensive materials, etc., and achieves the effects of wide application prospects, stable super-hydrophobic properties, and simple operation process.

Inactive Publication Date: 2008-04-09
陈洪 +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these existing methods either use expensive materials, or require special processing equipment or complex processes, making it difficult to popularize and apply

Method used

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  • Super-hydrophobic polystyrene film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Step 1: Rinse the dust on the surface of fresh taro leaves with tap water, then cut the taro leaves into a size of 15 cm and a width of 10 cm, and put them into a casting mold with a height of 5 cm for use;

[0022] The second step: the polydimethylsiloxane (PDMS) prepolymer and its catalyst benzoyl peroxide and the crosslinking agent azobisisobutyronitrile are mixed in a mass ratio of 100:1:5 and stirred for 5 Minutes, then placed in a vacuum box to extract the air bubbles in the mixture, then poured PDMS on the fresh taro leaves in the mold and cured in room temperature and atmospheric environment for 24 hours, then gently tore off the PDMS from the taro leaves to obtain PDMS soft template;

[0023] The third step: place the polydimethylsiloxane (PDMS) soft template in a mold with a height of 5.1 cm, and pour the polystyrene-tetrahydrofuran solution with a concentration of 20 mg / ml into the polydimethylsiloxane ( PDMS) template, and gently tear off the polystyrene fi...

Embodiment 2

[0025] Step 1: Rinse the dust on the surface of fresh taro leaves with tap water, then cut the taro leaves into a size of 15 cm and a width of 10 cm, and put them into a casting mold with a height of 5 cm for use;

[0026] The second step: the polydimethylsiloxane (PDMS) prepolymer and its catalyst benzoyl peroxide and the crosslinking agent azobisisobutyronitrile are mixed in a mass ratio of 100:0.1:10 and stirred for 10 Minutes, then placed in a vacuum box to extract the air bubbles in the mixture, then poured PDMS on the fresh taro leaves in the mold and cured in room temperature and atmospheric environment for 18 hours, then gently tore off the PDMS from the taro leaves to obtain PDMS soft template;

[0027] The third step: place the polydimethylsiloxane (PDMS) soft template in a mold with a height of 5.1 cm, and pour the polystyrene-tetrahydrofuran solution with a concentration of 1 mg / ml into the polydimethylsiloxane ( PDMS) template, and gently tear off the polystyrene...

Embodiment 3

[0029] Step 1: Rinse the dust on the surface of fresh taro leaves with tap water, then cut the taro leaves into a size of 15 cm and a width of 10 cm, and put them into a casting mold with a height of 5 cm for use;

[0030] The second step: the polydimethylsiloxane (PDMS) prepolymer and its catalyst benzoyl peroxide and the crosslinking agent azobisisobutyronitrile are mixed and stirred for 8 Minutes, then placed in a vacuum box to extract the air bubbles in the mixture, then poured PDMS on the fresh taro leaves in the mold and cured in room temperature atmosphere for 30 hours, then gently tore off the PDMS from the taro leaves to obtain PDMS soft template;

[0031] The third step: place the polydimethylsiloxane (PDMS) soft template in a mold with a height of 5.1 cm, and pour the polystyrene-tetrahydrofuran solution with a concentration of 70 mg / ml into the polydimethylsiloxane ( PDMS) template, and gently tear off the polystyrene film after drying in room temperature atmosphe...

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Abstract

The present invention discloses a super-hydrophobic polystyrene thin film and a preparation method thereof. The fresh taro leaves are placed in a casting mould; the poly dimethyl siloxane (PDMS) prepolymer, the catalyst and the crosslinker thereof are mixed by the proportion of 100: 0.1 to 2: 1 to 10 and are stirred for 5 to 10 minutes, the bubbles in the mixture are drawn out, then the mixture is casted on the fresh taro leaves in the mould, the solidification is carried out for 18 to 30 hours at the room temperature and the atmospheric environment, after that, a PDMS soft template is torn out; the polystyrene-tetrahydrofuran solution with the concentration of 1 to 70 mg / ml is casted on the PDMS template and is torn out after drying for 8 to 12 hours at the room temperature and the atmospheric environment, so as to get the taro leaf super-hydrophobic polystyrene thin film. A contact angle between the thin film and the water is more than 150 degrees, and a rolling angle is less than 10 degrees. The thin film is tasteless and non-toxic, which has very broad application prospect in the liquid non-loss transportation, self-cleaning, water-proofing and moisture-proofing and other fields. The method has simple operational process, good controllability, low cost, no need of complicated chemical treatments, no need of the expensive equipments and easy industrialization.

Description

technical field [0001] The invention relates to a super-hydrophobic polystyrene film, and also relates to a method for preparing the super-hydrophobic polystyrene film in an atmospheric environment at room temperature. Background technique [0002] Wettability is an important property of a solid surface, which is mainly determined by the chemical composition and surface roughness of the solid surface. On a smooth solid surface with the lowest surface energy, the contact angle can only increase to 120°C at most. However, in nature However, there are a large number of superhydrophobic surfaces (the contact angle between the surface of the material and water is greater than 150°, and the water drop has a small rolling angle on the surface), such as the contact angle between the surface of the lotus leaf and water reaches 160°, and the contact angle between the surface of the taro leaf and water The contact angle reached 159°. A paper published by Professor Barthlott et al. in P...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/18C08L25/06C08K5/23
Inventor 陈洪袁志庆彭万喜邓和平
Owner 陈洪
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