CN102491254B

CN102491254B - Method for wrinkling polydimethylsiloxane (PDMS) elastomer in selective area

Info

Publication number: CN102491254B
Application number: CN201110415841.5A
Authority: CN
Inventors: 鲁从华; 杨扬
Original assignee: Tianjin University
Current assignee: Tianjin University
Priority date: 2011-12-14
Filing date: 2011-12-14
Publication date: 2014-07-30
Anticipated expiration: 2031-12-14
Also published as: CN102491254A

Abstract

The invention discloses a technological preparation method for wrinkling a hard thin film layer on the surface of a PDMS elastomer in a selective area. The method comprises the following steps of: taking the PDMS as a film material, covering by using copper nets in different specifications and performing selective plasma exposure, so that a PDMS surface treatment layer becomes a SiOx hard layer; and forming wrinkles in the selective area under outside stimulation. The method has the characteristics of rapidness and simpleness, expensive instruments, complex process conditions and extreme experimental parameters are avoided, and the microstructure morphology on the surface of the PDMS elastomer is finely regulated and controlled.

Description

The method of a kind of polydimethylsiloxaneelastomer elastomer constituency wrinkle

Technical field

The present invention relates to the micro-structural process technology of polymer, be specifically related to the process of a kind of dimethyl silicone polymer (PDMS) elastomer constituency wrinkle.

Background technology

In the research field of material science in recent years, utilizing the graphic structure of polymeric material controlledly synthesis micro-nano-scale is one of them.It is polymerized by chemical reaction by a lot of monomers, the micro/nano-scale characteristic of its strand, stable and hold manageable synthetic reaction, the performances such as shirtsleeve operation flow process make it more and more become requisite material in field of micro-Na manufacture, Quake has delivered one piece of review article of applying in fields such as microfluidic device and minute manufacturings about soft material on < < science > > in 2000, wherein polymeric material is affirmed fully, this shows that polymeric material is in micro-nano field extensive application prospect.Micro-structural process technology based on polymer can classify as two kinds of approach with processing mode at present: a kind of is top-down methods, by photoetching technique, nanometer embossing, soft lithography, scan-probe process technology etc., the functional product microminiaturization of in characteristic size, the mankind being created, this method all adopts macroscopical manufacturing process or equipment to prepare the microstructure with specific function, as large scale integrated circuit; Another kind is method from bottom to top, refer to that take atom (group), molecule (group), strand etc. is elementary cell, according to people's mentality of designing, be built into the product with specific function, this method is normally prepared regular micro-structural based on architectural characteristics such as physics, chemistry, such as self-assembling technique.Current development trend is that both are effectively combined, thereby obtains all regular micro-structurals of both macro and micro.

Summary of the invention

The object of the invention is to overcome the deficiencies in the prior art, a kind of method is provided, the method has selected dimethyl silicone polymer (PDMS) for substrate, finely regulating the microstructure appearance of PDMS surface of elastomer, avoided using expensive instrument, complicated process conditions.

The present invention is achieved by following technical proposals:

A preparation method for polydimethylsiloxaneelastomer elastomer surface hard thin layer constituency wrinkle, is achieved according to following step:

(1) dimethyl silicone polymer performed polymer is pressed to (10-20) with crosslinking agent: 1 mass ratio mixes, and pours in vessel, with glass bar, fully stirs

(2) in the prepolymer mixing, have minute bubbles, need be undertaken by the multiplex vavuum pump of circulating water type degassedly, preferably the time is 2 hours

(3) after degassed completing, put it into constant temperature blast drying oven, the mixture mixing is put under 60 degree-70 degree, solidify 2 hours-6 hours

(4) PDMS membrane being cured is cut into 1cm * 5cm, by 100 order six side's copper mesh, 100 order four directions copper mesh, 300 order six side's copper mesh, 300 order four directions copper mesh are placed on PDMS film surface, with drawing stand, give film 10%-30% extensibility, under vacuum 200 millitorrs, carry out Cement Composite Treated by Plasma 20 minutes-30 minutes, after handling, copper mesh is taken down, then the PDMS stretching is processed 10 minutes-20 minutes under identical vacuum again, after handling, PDMS film is released into free state, obtains the senior wrinkle pattern in constituency.

In technical scheme of the present invention, in described step (4), when using plasma is processed, at dimethyl silicone polymer surface layer, prepared the very thin SiOx hard layer of one deck, this soft or hard compound system forming, under above-mentioned experiment condition, has prepared constituency wrinkle structure.

Method of the present invention has fast, and easy feature, and have good repeatability can large area realizes the preparation of PDMS chill mark.The fold pattern of preparation has constituency feature, and size can reach micron level.

Accompanying drawing explanation

Fig. 1 is the light microscope picture of the PDMS constituency wrinkle structure of the embodiment of the present invention 1 preparation.

Fig. 2 is the light microscope picture of the PDMS constituency wrinkle structure of the embodiment of the present invention 2 preparations.

Fig. 3 is the light microscope picture of the PDMS constituency wrinkle structure of the embodiment of the present invention 3 preparations.

Fig. 4 is the light microscope picture of the PDMS constituency wrinkle structure of the embodiment of the present invention 4 preparations.

The specific embodiment

Below in conjunction with specific embodiment, further illustrate technical scheme of the present invention.Select the Observer.A1 fluorescence microscope of German Zeiss Co., Ltd to observe, selecting crosslinking agent is the crosslinking agent of Dow corning company 184, the plasma power of selecting is middle-grade 15w.

Embodiment 1:

1. PDMS performed polymer was mixed than 20: 1 by certain mass with crosslinking agent, pour in vessel, with glass bar, fully stir.

2. in the prepolymer mixing, there are minute bubbles, need undertaken degassed by the multiplex vavuum pump of circulating water type.In degassed this experiment of time, be set as 2 hours.

3. after degassed completing, put it into constant temperature blast drying oven, the mixture mixing is solidified under 60 degree, solidify 6 hours.

4. the PDMS film being cured is cut into 1cm * 5cm, the copper mesh of the copper mesh of 100 order hexagonal structures and 100 order tetragonals is placed on to PDMS film surface, with drawing stand, give the extensibility of film 20%, under vacuum 200 millitorrs, with KQ-300E type ultrasonic cleaner, carry out Cement Composite Treated by Plasma 30min, after handling, PDMS film is released into free state, obtain constituency wrinkle, its pattern is shown in Fig. 1.

Embodiment 2:

1. PDMS performed polymer was mixed than 10: 1 by certain mass with crosslinking agent, pour in vessel, with glass bar, fully stir.

4. the PDMS film being cured is cut into 1cm * 5cm, the copper mesh of the copper mesh of 300 order hexagonal structures and 500 order hexagonal structures is placed on to PDMS film surface, with drawing stand, give the extensibility of film 10%, under vacuum 200 millitorrs, with KQ-300E type ultrasonic cleaner, carry out Cement Composite Treated by Plasma 15min, after handling, PDMS film is released into free state, obtain constituency wrinkle, its pattern is shown in Fig. 2.

Embodiment 3:

4. the PDMS film being cured is cut into 1cm * 5cm, the copper mesh in the copper mesh in 100 order four directions and 300 order four directions is placed on to PDMS film surface, with drawing stand, gives the extensibility of film 10%, under vacuum 200 millitorrs, with KQ-300E type ultrasonic cleaner, carry out plasma 25min, after handling, copper mesh is taken down, then the PDMS stretching is processed to 5min under identical vacuum again, after handling, PDMS film is released into free state, obtains the senior wrinkle pattern in constituency, its pattern is shown in Fig. 3.

Embodiment 4:

3. after degassed completing, put it into constant temperature blast drying oven, the mixture mixing is solidified under 70 degree, solidify 2 hours.

4. the PDMS film being cured is cut into 1cm * 5cm, 300 order six sides' copper mesh is placed on to PDMS film surface, with drawing stand, gives the extensibility of film 30%, under vacuum 200 millitorrs, with KQ-300E type ultrasonic cleaner, carry out plasma 20min, after handling, copper mesh is taken down, then the PDMS stretching is processed to 10min under identical vacuum again, after handling, PDMS film is released into free state, obtains the senior wrinkle pattern in constituency, its pattern is shown in Fig. 4.

Above the present invention has been done to exemplary description; should be noted that; in the situation that not departing from core of the present invention, the replacement that is equal to that any simple distortion, modification or other those skilled in the art can not spend creative work all falls into protection scope of the present invention.

Claims

1. a preparation method for polydimethylsiloxaneelastomer elastomer surface hard thin layer constituency wrinkle, is characterized in that, according to following step, carries out:

(1) dimethyl silicone polymer performed polymer is pressed to (10-20) with crosslinking agent: 1 mass ratio mixes, and pours in vessel, with glass bar, fully stirs;

(2) in the prepolymer mixing, have minute bubbles, need be undertaken by the multiplex vavuum pump of circulating water type degassedly, the time is 2 hours;

(3) after degassed completing, put it into constant temperature blast drying oven, the mixture mixing is put under 60 degree-70 degree, solidify 2 hours-6 hours;

2. the preparation method of a kind of polydimethylsiloxaneelastomer elastomer surface hard thin layer according to claim 1 constituency wrinkle, it is characterized in that, in described step (4), when using plasma is processed, at dimethyl silicone polymer surface layer, prepared the very thin SiOx hard layer of one deck, this soft or hard compound system forming, under above-mentioned experiment condition, has prepared constituency wrinkle structure.