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Method for preparing coaxial microchannel reactor

A microchannel reactor, coaxial technology, applied in the field of microfluidics, can solve problems such as time-consuming, channel damage, and difficulty in sealing, and achieve the effect of less time-consuming, low cost, and avoiding clogging

Inactive Publication Date: 2009-03-04
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main disadvantages of chip-type microreactors are: (1) making a microreactor requires a lot of special equipment and takes a lot of time; (2) sealing is difficult, and the channels formed during photolithography or micromachining It is often destroyed; (3) It is prone to blockage during the reaction process

Method used

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  • Method for preparing coaxial microchannel reactor
  • Method for preparing coaxial microchannel reactor
  • Method for preparing coaxial microchannel reactor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Take a polytetrafluoroethylene microtube A with an inner diameter of 1.6 mm and a length of 40 cm, and two microtubes a with an inner diameter of 300 μm and an outer diameter of 700 μm and a length of 30 cm 1 and a 2 ; put a 1 、a 2 The microtube is placed into tube A, where a 1 Placed at the central axis of tube A, the length into tube A is 16cm; a 2 The length that enters the tube A is 4 cm; seal and fix the microtube with epoxy resin, and place the microtube a in the microchannel device 1 and a 2 Connect with two syringes placed on the syringe pump respectively to obtain a coaxial microchannel reactor, such as figure 1 shown.

[0031] Use a syringe pump to inject the polylactic acid solution and polyvinyl alcohol solution, which are the raw materials for preparing polymer microspheres, into the microchannel reaction device at a concentration of 0.05 g / mL and 0.015 g / mL respectively. A small amount of red oily dye is added to the polylactic acid solution, The pu...

Embodiment 2

[0033] Take a polytetrafluoroethylene microtube A with an inner diameter of 1.8 mm and a length of 50 cm, and two microtubes a with an inner diameter of 400 μm and an outer diameter of 800 μm and a length of 50 cm 1 and a 2 ; in microtubule a 1 A section of glass capillary with an inner diameter of 200 μm and a length of 5 cm is sealed at the head of the tube A; 1 、a 2 The microtube is placed into tube A, where a 1 Placed at the central axis of tube A, the length into tube A is 18cm, a 2 The length that enters the tube A is 5 cm; seal and fix the microtube with epoxy resin, and place the two thinner microtubes a in the microchannel device 1 and a 2 They are respectively connected with two syringes placed on the syringe pump to obtain a coaxial microchannel reactor.

[0034] Use a syringe pump to inject the polylactic acid solution and polyvinyl alcohol solution, which are the raw materials for preparing polymer microspheres, into the microchannel reaction device. / min, ...

Embodiment 3

[0037] Take a polytetrafluoroethylene microtube A with an inner diameter of 1.2 mm and a length of 50 cm, and two microtubes a with an inner diameter of 200 μm and an outer diameter of 400 μm and a length of 40 cm 1 and a 2 ; in microtubule a 1 A section of polypropylene hollow fiber with an inner diameter of 120 μm and a length of 5 cm is sealed at the head of the tube to be inserted into the tube A;1 、a 2 The microtube is placed into tube A, where a 1 Placed at the central axis of tube A, the length into tube A is 14cm, a 2 The length that enters into tube A is 3 cm; seal and fix the microtube with epoxy resin, and place the two thinner microtubes a in the microchannel device 1 and a 2 They are respectively connected with two syringes placed on the syringe pump to obtain a coaxial microchannel reactor.

[0038] Use a syringe pump to inject the polylactic acid solution and polyvinyl alcohol solution, which are the raw materials for preparing polymer microspheres, into th...

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Abstract

The invention relates to a preparation method for a coaxial micro-channel reactor and comprises the following steps: (1) selecting three polyfluortetraethylene micro tubes, wherein a micro tube with a larger inner diameter (A) is used as an outer tube and the other two with relatively small inner diameter (a1, a2) are used as inner tubes; (2) adopting epoxide resin to seal in a length of glass capillary or hollow fibre at the tube head supposed to enter micro tube A of the micro tube a1; (3) puting the two micro tubes a1and a2 in the micro tube A, wherein a1 is located in the position of the central axis of the micro tube A and the length of a1 entering the tube A is larger than a2; and utilizing epoxide resin to seal and fixe the micro tubes and get a coaxial micro channel; (4) and connecting micro tube a1 and a2 respectively to two injectors which are placed on an inject pump to form the coaxial micro-channel reactor. The invention has simple and convenient production process, and controllable micro-channel size, thereby realizing the use for producing monodisperse polymeric beads with the diameter ranging from 200 to 1000 micrometers. Furthermore, the invention has the advanthges of low cost and short consumption time.

Description

technical field [0001] The invention belongs to the field of microfluid technology, in particular to a preparation method of a coaxial microchannel reactor. Background technique [0002] Microchannel reactors, also known as microstructures or microreactors, contain microchannels of various shapes inside, and corresponding reactions occur when reactants pass through the microchannels. Compared with commonly used reactors, microreactors are small and precise in structure, have high heat transfer, mass transfer and reaction efficiency, and are safe and portable, so more and more scientists are attracted to the development of microreactors. research and application. [0003] In polymer science, microreactors are mainly used for synthesizing linear polymers, preparing polymer solid particles (such as microspheres, discs, etc.) Thermal control, fluidity of the fluid. [0004] Rapid mixing can reduce the reaction time and increase the production efficiency, but the mixing in the...

Claims

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Application Information

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IPC IPC(8): B01J19/00B01J13/02
Inventor 王宏志朱丽萍朱美芳李耀刚张青红
Owner DONGHUA UNIV
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