Method for utilizing PDPAEMA modified shape memory polymers to regulate and control surface permeability
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A technology of memory polymer and surface infiltration, which is applied in the field of regulating surface wettability by modifying shape memory polymer with PDPAEMA
Active Publication Date: 2018-01-05
HARBIN INST OF TECH
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[0004] The purpose of the present invention is to solve the existing technical problems of controllable regulation of surface wettability, and to provide a method for regulating surface wettability by using PDPAEMA modified shape memory polymers
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specific Embodiment approach 1
[0021] Specific embodiment 1: What this embodiment describes is a method for regulating surface wettability by using PDPAEMA modified shape memory polymer, the method includes the following steps:
[0022] Step 1: use photolithography to etch the silicon wafer, so that the surface of the silicon wafer presents different arrays, the length × width of the etched silicon wafer array is 10 μm × 10 μm, the array spacing is 5 μm-30 μm, and the array height is 10-30μm;
[0023] Step 2: Use polydimethylsiloxane to shape the silicon wafer, the weight ratio of silicone rubber to curing agent is 90-150:10, the curing temperature is 65-100°C, and demold after curing to obtain the silicon wafer Array reversed PDMS template;
[0024] Step 3: Use the PDMS template to shape the shape-memory epoxy resin microarray, use epoxy resin and curing agent, and mix the glue according to the weight ratio of 0.01-0.017:1, and cure it at 60-120°C for 10 -24h, demoulding to obtain the shape memory epoxy ...
specific Embodiment approach 2
[0027] Specific embodiment 2: The method of using PDPAEMA modified shape memory polymer to regulate surface wettability described in specific embodiment 1, in step 3, the epoxy resin is epoxy resin E51 or epoxy resin E44, and the curing The agent is n-octylamine, dodecylamine or m-xylylenediamine.
specific Embodiment approach 3
[0028]Specific embodiment three: the method of using PDPAEMA to modify shape memory polymers for surface wettability regulation described in specific embodiment one, in step four, the silane coupling agent is 3 aminopropylmethoxysilane or 3 aminopropyl Ethoxysilane.
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Abstract
The invention discloses a method for utilizing PDPAEMA modified shape memory polymers to regulate and control surface permeability, and relates to the method for regulating and controlling the surfacepermeability of materials. The method comprises the main steps of 1, etching silicon wafers by means of photolithography; 2, shaping the silicon wafers by utilizing PDMS; 3, shaping a shape memory epoxy resin micro-array by utilizing a PDMS template; 4, grafting poly2-(diisopropylaminoethyl methacrylate) (PDPAEMA) on the surface of the epoxy resin micro-array; 5, regulating and controlling the surface permeability by utilizing a sample obtained in the step 4. The method has the advantages that surface microstructure regulation and control is combined with surface pH response molecules for thefirst time, through the synergistic effect of physical regulation and control and chemical regulation and control, the controllable permeability conversion on the same surface is achieved from a super-hydrophilic mode to a super-hydrophobic mode, the obtained intelligent surface can be used for surface cell, oil-water separation and the like of intelligent devices, and the method is a novel preparation technology of response surfaces.
Description
technical field [0001] The invention relates to a method for regulating the wettability of the surface of a material. Background technique [0002] Wettability is a basic property of solid interface, which plays an important role in people's daily life, industry and agricultural production. In recent years, due to the unique function and application background of special wettable surfaces, researchers have paid extensive attention to them. For example, superhydrophilic clear coatings initiated using UV light have been successfully applied in anti-fog and self-cleaning materials. Superhydrophobic surfaces have important potential applications in the fields of self-cleaning materials, corrosion protection, oil-water separation, and liquid collection. [0003] Stimuli-responsive materials can be used to tune surface wettability, since their surface free energy and morphology can easily change with changes in the external environment. The structure of functional molecules on ...
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