A kind of water directional transport material based on reversible remodeling of light-responsive structure and its preparation method and application
A technology of directional transmission and photoresponse, applied in mechanical equipment, gas/liquid distribution and storage, pipeline system, etc., can solve the problems of difficult molding, unadjustable phase transition temperature, poor mechanical stability, etc., and achieve low price and easy operation , prepare simple effects
Active Publication Date: 2020-07-24
TSINGHUA UNIV
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Problems solved by technology
However, poly-N-isopropylacrylamide hydrogels have poor mechanical stability and are difficult to form, and the phase transition temperature of pure poly-N-isopropylacrylamide hydrogels cannot be adjusted.
Method used
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Embodiment 1
[0048] Example 1. Preparation of water-oriented transport materials based on reversible remodeling of photoresponsive structures
[0049] In this embodiment, reduced graphene oxide is used as the light-to-heat conversion material.
[0050] Prepare graphene oxide according to the improved Hummers method: accurately weigh 2.5g of phosphorus pentoxide and 2.5g of potassium persulfate, add them to a 250mL Erlenmeyer flask, add 20mL of concentrated sulfuric acid under the condition of constant stirring, under this condition , heat the mixture to 80°C, and add 3g of graphite powder to it, the particle size of graphite powder is 320 mesh, add 20mL of concentrated sulfuric acid under constant stirring, after heating to 80°C, slowly add 3g of graphite powder into the solution , kept heating and stirring at 80° C. for 4.5 hours, and after the heating was completed, stand and cool at room temperature. Add 700mL of deionized water under constant heating and stirring, and keep the tempera...
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Abstract
The invention discloses an oriented water transmission material based on reversible remodeling of a photoresponse structure as well as a preparation method and an application of the material. The oriented water transmission material adopts a tubular structure with photo-thermal conversion capacity, and the inner wall of the tubular structure is modified with thermosensitive hydrogel; the tubular structure is prepared from a support framework and a photo-thermal conversion material doped in the support framework; the thermosensitive hydrogel is modified on the inner wall of the tubular structure in a free radical polymerization manner. The oriented water transmission material has the advantages that the material is simple to prepare, easy to operate and applicable to mass production and rawmaterials are low in cost; sunlight, ubiquitous green energy, can be used as a driving force source and a low-carbon and green transmission manner is realized; the water transmission speed can be changed by changing the illumination intensity; the water transmission direction can be controlled remotely by changing the illumination direction; water transmission can be started and stopped by turning on and off a light source.
Description
technical field [0001] The invention relates to a water directional transport material based on reversible remodeling of a light-responsive structure, a preparation method and application thereof, and belongs to the field of functional materials. Background technique [0002] Controllable and directional water transport has very important theoretical and practical significance for the fields of water collection, biological detection, seawater desalination and oil-water separation. The existing water transport technology is mainly based on the preset surface anisotropy structure and wettability. The preparation process of water transmission equipment is complicated, the energy consumption of the preparation process is high, and the efficiency of water collection is low when using it, and it does not have the controllability and remote controllability of the direction of water directional transmission, and it is impossible to start long-distance water transmission. Stopping an...
Claims
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IPC IPC(8): C08J5/02C08J7/18C08L83/04C08K3/04F17D1/08
CPCC08J5/02C08J7/18C08J2383/04C08K3/042F17D1/08
Inventor 耿洪亚曲良体李春
Owner TSINGHUA UNIV