Preparation method of CO2 responsive intelligent hydrophilic and hydrophobic switching copper net
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A hydrophilic-hydrophobic, CO2 technology, applied in the field of preparation of hydrophilic-hydrophobic conversion materials, can solve the problems of inability to improve hydrophobicity and superhydrophobicity, and achieve the effects of fast hydrophilic-hydrophobic conversion speed, improved durability, and simple preparation methods
Active Publication Date: 2018-08-03
HARBIN INST OF TECH
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[0003] The present invention is to solve the existing CO 2 In response to the technical problem that the hydrophilicity conversion material cannot improve the existing hydrophobicity to superhydrophobicity, a CO 2 Preparation method of responsive intelligent hydrophilic-hydrophobic switching copper mesh
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specific Embodiment approach 1
[0026] Specific implementation mode 1: This implementation mode is a CO 2 The preparation method of responsive intelligent hydrophilic-hydrophobic conversion copper mesh is specifically carried out according to the following steps:
[0027] 1. Preparation of a copper mesh with a needle-like rough structure: Place the copper mesh with a pore size of 50 μm to 1000 μm in acetone, ethanol and ultrapure water for 15 minutes to 30 minutes, and the ultrasonic frequency is 25KHz to 60KHz. Dry at a temperature of 40°C to 80°C for 30 minutes;
[0028] Prepare NaOH and K 2 S 2 o 8 The mixed aqueous solution, put the dried copper mesh in NaOH and K 2 S 2 o 8in a mixed aqueous solution, and etched at room temperature for 10min to 120min, then cleaned with ultrapure water, and dried for 30min at a temperature of 40°C to 80°C to obtain a copper mesh with a needle-like rough structure;
[0029] NaOH and K described in step 1 2 S 2 o 8 The concentration of NaOH in the mixed aqueous s...
specific Embodiment approach 2
[0038] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the inert gas I described in step 3 is N 2 . Others are the same as the first embodiment.
specific Embodiment approach 3
[0039] Embodiment 3: This embodiment is different from Embodiment 1 or Embodiment 2 in that the inert gas I described in step 3 is argon. Others are the same as those in Embodiment 1 or 2.
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Abstract
The invention relates to a preparation method of a CO2 responsive intelligent hydrophilic and hydrophobic switching copper net, which relates to a preparation method of a hydrophilic and hydrophobic switching material, and solves the technical problems that the existing CO2 responsive hydrophilic and hydrophobic material cannot improve the existing hydrophobic performance to the super-hydrophobicperformance. The preparation method comprises the following steps: I, preparing a copper net with a needle-shaped coarse structure; II, assembling Ag nano particles onto the surface of the copper net;III, preparing a CO2 responsive polymer; and IV, preparing the CO2 responsive super-hydrophobic copper net. According to the preparation method, by etching the surface of the copper net and assembling the Ag nano particles onto the surface of the copper net, the surface coarse structure of the copper net can be improved; and the PDEAEMA-CTA and PDMS are modified on the surface of the copper net,so that the surface of the copper net simultaneously has the super-hydrophobic characteristic and the intelligent hydrophilic and hydrophobic switching characteristic under the response of CO2, and the surface durability is improved by using the PDMS. By adopting the copper net prepared by the method provided by the invention, the switching of the super-hydrophobic property and the super-hydrophilic property can be realized in 5 min to 15 min.
Description
technical field [0001] The invention relates to a preparation method of a hydrophilic-hydrophobic conversion material. Background technique [0002] CO 2 As a stimulus response method, it has received widespread attention due to its rich content, easy availability, low price, and no accumulation of by-products in the reaction (S. Lin, P. Theato, Macromol. Rapid Commun., 2013, 34, 1118-1133). CO 2 Response material is defined as being subjected to CO 2 When stimulated, the physical structure or chemical properties of the material itself undergo reversible changes, resulting in changes in some macroscopic properties, such as color, viscosity, and surface wettability (H, Che, M. Huo, L. Peng, Tommy Fang , et al. Angew. Chem. Int. Ed. 2015, 54, 8934-8938). Among them, compounds containing amine or amidine groups are better CO 2 Responsive material. in CO 2 In response, the amine or amidino group with CO 2 The protonation reaction produces a positive charge, which conver...
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