A multifunctional microfluidic chip reaction device for preparing hydrogen peroxide

Abstract

The present invention belongs to the technical field of hydrogen peroxide preparation, and specifically relates to a multifunctional microfluidic chip reaction device for preparing hydrogen peroxide, including a microfluidic chip reactor, the microfluidic chip reactor including a cover sheet and a microfluidic chip, and the two are bonded together by hot pressing. It also includes a matching clamp mechanism and a plurality of dams arranged on the microfluidic channel of the microfluidic chip, and the microfluidic chip reactor is embedded in the clamp mechanism and fixed in the second card slot. The microfluidic chip includes four sections of microfluidic channels connected in sequence, namely a premixing microchannel, a first reaction microchannel, an effluent secondary mixing channel, and a second reaction microchannel. The hydrogen peroxide prepared by the present invention can realize continuous production of low-concentration hydrogen peroxide on a safe and non-explosive platform, meet the application needs of the terminal market, and can select different liquid outlets to extract hydrogen peroxide according to actual conditions, improve the flexibility and usability of operation, and has good technical characteristics.

Description

Technical Field

[0001] The invention belongs to the technical field of hydrogen peroxide preparation, and in particular relates to a multifunctional microfluidic chip reaction device for preparing hydrogen peroxide. Background Art

[0002] Hydrogen peroxide is the common name for hydrogen peroxide. It is a colorless and transparent liquid. Its aqueous solution can be used for wound disinfection, environmental disinfection, and food disinfection. As a common oxidant, the only product of hydrogen peroxide in the reaction process is water. It is recognized as a green and clean chemical product and has been widely used in chemical synthesis, papermaking, printing and dyeing and other industries. With the continuous development of economy and society, the demand for hydrogen peroxide is increasing both domestically and internationally.

[0003] The preparation of hydrogen peroxide usually adopts the anthraquinone method in industry, and hydrogen peroxide produced by the anthraquinone method accounts for 95% and 99% of the global and domestic production respectively. The anthraquinone method adopts an indirect process of hydrogenation and oxidation in sequence, which has the disadvantages of high energy consumption, high cost and high pollution in the production and product separation and purification process. Therefore, industry and academia have been looking for green synthesis methods that can replace the anthraquinone method. Among them, the direct catalytic synthesis method of hydrogen and oxygen is a potential method for industrial production of hydrogen peroxide, which has the advantages of low pollution, high atomic utilization rate and simple operation. In addition, unlike the anthraquinone method, which is only suitable for large-scale production of high-concentration hydrogen peroxide, the direct synthesis method of hydrogen and oxygen can synthesize hydrogen peroxide products of different concentrations according to demand (Research Progress of Palladium-based Catalysts for Direct Synthesis of Hydrogen Peroxide by Hydrogen and Oxygen, Zhang Meijia et al., School of Chemical Engineering, Beijing University of Chemical Technology, Journal of Chemical Industry, Vol. 72, No. 1, 2021). However, due to technical factors, industrial production and application have not been achieved so far.

[0004] Traditional reactors have low integration and automation, serious waste of resources, poor selectivity, poor reproducibility and safety hazards. In this context, microreactors have emerged, especially microfluidic chip reactors, which have been rapidly developed and widely used in the past 20 years. Microfluidic chip reactors use microchannels as the place of reaction, so that materials can be quickly mixed and reacted at a limited micrometer scale, showing unique advantages. Microfluidic chip reactors have received more and more attention in the chemical industry due to their advantages such as high heat transfer, no amplification effect and high safety performance. The direct catalytic synthesis of hydrogen peroxide by hydrogen and oxygen is considered to be the most promising alternative to the anthraquinone method. However, there is still a long way to go before this method can be industrialized. The main challenges are: 1. Hydrogen and oxygen will explode in a large proportion range (4%-74%); 2. Side reactions (including reaction water, hydrogen peroxide hydrogenation, and hydrogen peroxide decomposition) are more thermodynamically favorable, resulting in low selectivity of hydrogen peroxide. The application of microfluidic chip reactor to directly catalyze the synthesis of hydrogen peroxide from hydrogen and oxygen through microfluidic technology can not only achieve the safe production of hydrogen peroxide, but also realize its continuous reaction, thus providing a safe and continuous production reaction platform for the synthesis of hydrogen peroxide, which has good application prospects.

[0005] According to statistics, the demand for low-concentration hydrogen peroxide (below 1%) accounts for more than 60% of the terminal market, which means that the hydrogen peroxide produced by the anthraquinone method needs to be transported and diluted before use, which brings about safety issues and a substantial increase in costs. The microfluidic chip reactor invented by this method can continuously synthesize low-concentration hydrogen peroxide to meet market demand. This method of direct hydrogen and oxygen catalytic synthesis of hydrogen peroxide has a high atomic utilization rate and is a green production technology that complies with the national sustainable development strategy. Compared with traditional technologies, it is a very promising synthesis method. Compared with traditional hydrogen peroxide preparation methods, it has outstanding advantages, as shown in:,

[0006] (1) Micron-scale microchannels will not explode during the production reaction and are clean and highly safe;

[0007] (2) Visualization of the reaction process, using microscopes, high-speed cameras, etc., to more effectively and in real time understand the entire reaction process;

[0008] (3) The reaction can be continuous and the concentration of the prepared hydrogen peroxide meets the needs of the terminal market (0.7%-1%). There is no need to dilute the hydrogen peroxide concentration and it can be directly used in subsequent chemical synthesis technologies such as coupling reactions;

[0009] (4) Multiple microfluidic chips can be used for superposition (series and parallel) reactions, greatly improving space utilization and increasing output and production efficiency;

[0010] (5) The reaction can be carried out at normal temperature and pressure, the production environment conditions are relatively loose, the investment cost is small and the rate of return is high. Summary of the invention

[0011] The present invention aims to solve the above technical problems and provides a multifunctional microfluidic chip reaction device for preparing hydrogen peroxide, which mainly solves the technical problems in the prior art such as easy explosion in the production process, low utilization rate of oxygen and hydrogen, inability to react continuously, and low working efficiency.

[0012] To achieve the above-mentioned purpose, the technical solution of the present invention is: a multifunctional microfluidic chip reaction device for preparing hydrogen peroxide, comprising a microfluidic chip reactor, the microfluidic chip reactor comprising a cover sheet and a microfluidic chip, the cover sheet is hot-pressed bonded to the microfluidic chip, the present invention also includes a clamp mechanism and a plurality of dams arranged on the microfluidic chip, the microfluidic chip reactor is embedded in the clamp mechanism.

[0013] The microfluidic chip comprises four sections of microfluidic channels and two sections of fine channels which are connected in sequence. The four sections of microfluidic channels are respectively a premixing microchannel, a first reaction microchannel, an effluent secondary mixing channel and a second reaction microchannel. The premixing microchannel is connected to the front end of the first reaction microchannel, one end of the effluent secondary mixing channel is connected to the rear end of the first reaction microchannel, and the other end is connected to the front end of the second reaction microchannel. The microfluidic chip is provided with two air inlets and a liquid inlet, the liquid inlet is arranged at the front end of the premixing microchannel, the two air inlets are respectively located on both sides of the liquid inlet and are respectively connected to the premixing microchannel through a section of the fine channel.

[0014] The front end and the rear end of the first reaction microchannel are respectively provided with a first inlet hole and a first liquid outlet hole, and a dam is provided on the first reaction microchannel in front of the first inlet hole and the first liquid outlet hole. The front end and the rear end of the second reaction microchannel are respectively provided with a second inlet hole and a second liquid outlet hole, and a dam is provided on the second reaction microchannel in front of the second inlet hole and the second liquid outlet hole.

[0015] Preferably, the clamp mechanism includes a clamp body and a plurality of joint assemblies, the clamp body is provided with a first card slot and a second card slot adapted to the microfluidic chip reactor, the first card slot is located above the second card slot and its diameter is larger than the second card slot, the microfluidic chip reactor is embedded in the second card slot, and the bottom of the clamp body is provided with a plurality of threaded holes corresponding to the air inlet, the liquid inlet, the first inlet, the first liquid outlet, the second inlet and the second liquid outlet, respectively, and the joint assembly is threadedly connected in the threaded holes.

[0016] Preferably, the joint assembly comprises a joint body with a hollow structure, a conduit and a pipe clamp, the conduit is inserted in the joint body, and the pipe clamp is clamped on the conduit.

[0017] Preferably, the first reaction microchannel and the effluent secondary mixing channel are both arranged in a wavy curve structure, and the second reaction microchannel is arranged in a straight line structure.

[0018] Preferably, the height of the plurality of dams is smaller than the depth of the microfluidic channel.

[0019] Preferably, the first inlet hole, the first liquid outlet hole, the second inlet hole and the second liquid outlet hole are all inlaid with quartz wool.

[0020] Preferably, the cover sheet and the microfluidic chip can be made of one of PMMA, glass or metal materials.

[0021] Due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0022] 1. The present invention provides a multifunctional microfluidic chip reaction device for preparing hydrogen peroxide, which has a simple structure and is easy to use. Two-stage reaction microchannels are arranged. After hydrogen, oxygen and aqueous solution are evenly mixed through a premixing microchannel, hydrogen peroxide can be collected at the end of the first reaction microchannel or at the end of the second reaction microchannel according to actual conditions, thereby improving the flexibility of operation; the secondary mixing channel for effluent is arranged to effectively increase the reaction time and thus improve the utilization rate of hydrogen and oxygen, and facilitate the increase in the concentration of hydrogen peroxide when extracted at the end of the second reaction microchannel (preparing hydrogen peroxide with a concentration of 1%).

[0023] 2. The dams in the first reaction microchannel and the second reaction microchannel of the present invention can effectively limit the overflow of catalyst particles, which can not only prevent the catalyst particles from flowing out without restraint, thereby reducing the production and preparation costs, but also prevent the poor quality and low concentration of the finished hydrogen peroxide product due to the participation of catalyst particles, thereby improving production efficiency.

[0024] 3. In the present invention, the clamp body is provided with a first card slot and a second card slot adapted to the microfluidic chip reactor. The microfluidic chip reactor is embedded in the second card slot. After the preparation work is completed, the microfluidic chip reactor can be conveniently clamped from the first card slot to separate it from the clamp body, thereby improving the practicality of the device; the tube clamp in the joint assembly is convenient for controlling the flow in or out of the conduit for circulating gas, aqueous solution, catalyst particles and hydrogen peroxide, etc., accurately controlling the reaction process and conditions, and the operation is simple and convenient.

[0025] 4. In the present invention, the first reaction microchannel and the secondary mixing channel of the effluent are both arranged in a wave curve structure, which serves to increase the path and time of the oxidation reaction and improve the oxidation efficiency; the second reaction microchannel is arranged in a straight line structure, which is convenient and fast to collect hydrogen peroxide in the second liquid outlet, thereby improving work efficiency; the first inlet hole, the first liquid outlet hole, the second inlet hole and the second liquid outlet hole are all inlaid with quartz wool, and the quartz wool combined with the dam has the function of secondary blocking the overflow of catalyst particles, which doubles the insurance to avoid ineffective waste of catalyst particles and ensure the concentration of the prepared hydrogen peroxide product. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of the present invention;

[0027] Figure 2 A top view of the microfluidic chip of the present invention;

[0028] Figure 3 is a cross-sectional view of the first reaction microchannel of the present invention;

[0029] Figure 4 is a cross-sectional view of the second reaction microchannel of the present invention;

[0030] Figure 5 is a top view of the clamp mechanism of the present invention;

[0031] Figure 6 It is a front view of the clamp mechanism of the present invention;

[0032] The main component symbols in the figure are explained as follows:

[0033] 1. Cover sheet; 2. Microfluidic chip; 21. Premixing microchannel; 22. First reaction microchannel; 221. First inlet hole; 222. First liquid outlet hole; 23. Secondary mixing channel for effluent; 24. Second reaction microchannel; 241. Second inlet hole; 242. Second liquid outlet hole; 25. Air inlet hole; 26. Liquid inlet hole; 3. Clamp mechanism; 31. Clamp body; 311. First card slot; 312. Second card slot; 313. Threaded hole; 32. Connector assembly; 321. Connector body; 322. Conduit; 323. Tube clamp; 4. Dam; 5. Quartz wool. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] Example

[0036] like Figures 1 to 6 As shown, a multifunctional microfluidic chip reaction device for preparing hydrogen peroxide includes a microfluidic chip reactor, the microfluidic chip reactor includes a cover sheet 1 and a microfluidic chip 2, the present invention also includes a clamp mechanism 3 and a plurality of dams 4 arranged on the microfluidic chip 2, the cover sheet 1 is hot-pressed and bonded to the microfluidic chip 2, and the microfluidic chip reactor is embedded in the clamp mechanism 3.

[0037] In this embodiment, Figure 2 As shown, the microfluidic chip 2 includes four sections of microfluidic channels and two sections of fine channels connected in sequence. The four sections of microfluidic channels are respectively a premixing microchannel 21, a first reaction microchannel 22, an effluent secondary mixing channel 23 and a second reaction microchannel 24. The premixing microchannel 21 is connected to the front end of the first reaction microchannel 22, one end of the effluent secondary mixing channel 23 is connected to the rear end of the first reaction microchannel 22, and the other end is connected to the front end of the second reaction microchannel 24. The microfluidic chip 2 is provided with two air inlets 25 and a liquid inlet 26. The liquid inlet 26 is provided at the front end of the premixing microchannel 21. The two air inlets 25 are respectively located on both sides of the liquid inlet 26 and are respectively connected to the premixing microchannel 21 through a section of fine channels. The two air inlets 25 are respectively introduced into oxygen and hydrogen, and the liquid inlet 26 is introduced into the aqueous solution. The three enter the premixing microchannel 21 for premixing and then flow into the first reaction microchannel 22. The present invention sets two sections of reaction microchannels. After hydrogen, oxygen and aqueous solution are evenly mixed through the premixing microchannel 21, hydrogen peroxide can be collected at the end of the first reaction microchannel 22 or at the end of the second reaction microchannel 24 according to actual conditions, thereby improving the flexibility of operation; setting the effluent secondary mixing channel 23 can effectively increase the reaction time and thus improve the utilization rate of hydrogen and oxygen, and facilitate the increase of the concentration of hydrogen peroxide when extracted at the end of the second reaction microchannel (preparing hydrogen peroxide with a concentration of 1%). Specifically, the narrow channel is 0.2 mm wide and 0.12 mm deep; the premixing microchannel 21, the first reaction microchannel 22, the effluent secondary mixing channel 23 and the second reaction microchannel 24 are all 0.8 mm wide and 0.9 mm deep.

[0038] In this embodiment, Figure 2 and Figure 3 As shown, the front end and the rear end of the first reaction microchannel 22 are respectively provided with a first inlet hole 221 and a first liquid outlet hole 222, and a dam 4 is provided on the first reaction microchannel 22 in front of the first inlet hole 221 and the first liquid outlet hole 222. Figure 2 and Figure 4As shown, the front and rear ends of the second reaction microchannel 24 are respectively provided with a second inlet hole 241 and a second outlet hole 242, and a dam 4 is provided on the second reaction microchannel 24 in front of the second inlet hole 241 and the second outlet hole 242. Specifically, the height of the plurality of dams 4 is less than the depth of the microfluidic channel. In this embodiment, the width of the dam 4 is 0.8 mm and the height is 0.1 mm. The first inlet hole 221 and the second inlet hole 241 are used to introduce catalyst particles to react with oxygen, hydrogen and aqueous solution to prepare hydrogen peroxide. In this embodiment, the catalyst particles are selected from palladium aluminum oxide catalysts; the first outlet hole 222 and the second outlet hole 242 are used to extract hydrogen peroxide according to actual conditions. At the same time, the distance between the dam 4 and the cover sheet 1 is substantially less than the size of the catalyst particles. A region for blocking the overflow of catalyst particles is formed between the two dams 4 on the first reaction microchannel 22 and the two dams 4 on the second reaction microchannel 24, which can not only prevent the catalyst particles from flowing out without restraint, but also play a role in reducing the production and preparation costs, and can also prevent the poor quality and impure concentration of the finished hydrogen peroxide due to the participation of catalyst particles, thereby improving production efficiency.

[0039] In this embodiment, Figure 1 , Figure 5 and Figure 6 As shown, the clamp mechanism 3 includes a clamp body 31 and a plurality of joint components 32. The clamp body 31 is provided with a first slot 311 and a second slot 312 adapted to the microfluidic chip reactor. The first slot 311 is located above the second slot 312 and its diameter is larger than the second slot 312. The microfluidic chip reactor is embedded in the second slot 312. The bottom of the clamp body 31 is provided with a plurality of threaded holes 313 corresponding to the air inlet 25, the liquid inlet 26, the first introduction hole 221, the first liquid outlet 222, the second introduction hole 241 and the second liquid outlet 242, respectively. The joint components 32 are threadedly connected in the threaded holes 313. The clamp body 31 is provided with a first slot 311 and a second slot 312 adapted to the microfluidic chip reactor. The microfluidic chip reactor is embedded in the second slot 312. When the preparation work is completed, it is convenient to clamp the microfluidic chip reactor from the first slot 311 and separate it from the clamp body 31, thereby improving the practicality of the device. Specifically, the joint assembly 32 includes a joint body 321 with a hollow structure, a conduit 322 and a pipe clamp 323. The conduit 322 is inserted into the joint body 321, and the pipe clamp 323 is clamped on the conduit 322. The pipe clamp 323 is convenient for controlling the flow in or out of the conduit 322 for circulating gas, aqueous solution, catalyst particles and hydrogen peroxide, etc., accurately controlling the reaction process and conditions, and the operation is simple and convenient.

[0040] In this embodiment, refer to Figure 1, the first reaction microchannel 22 and the secondary mixing channel 23 of the effluent are both arranged in a wave curve structure, which serves to increase the path of the oxidation reaction and the oxidation reaction time, and improve the oxidation efficiency; the second reaction microchannel 24 is arranged in a straight line structure, which is convenient and fast to extract hydrogen peroxide in the second liquid outlet 242, and improves work efficiency. Specifically, the first inlet hole 221, the first liquid outlet 222, the second inlet hole 241 and the second liquid outlet 242 are all inlaid with quartz wool 5. The quartz wool 5 combines with the common limiting effect of the dam 4 to play a secondary role in blocking the overflow of catalyst particles, and the double insurance avoids the ineffective waste of catalyst particles and ensures the concentration of the prepared hydrogen peroxide product. Specifically, the cover sheet 1 and the microfluidic chip 2 can be made of one of PMMA, glass or metal materials. Each material has the advantages of good chemical stability, mechanical properties and weather resistance.

[0041] The microfluidic channel of the microfluidic chip 2 of the present invention includes but is not limited to four sections. More microfluidic channels can be extended on the basis of the four sections according to actual test conditions for the preparation of hydrogen peroxide, or continuous reactions can be superimposed on the basis of a single microfluidic chip 2 to improve the yield and production efficiency of hydrogen peroxide. At the same time, the device is not limited to the preparation and extraction of hydrogen peroxide. The hydrogen peroxide overflowing from the first liquid outlet 222 or the second liquid outlet 242 can be connected to other equipment through a conduit 322 connected to the two holes for subsequent coupling reactions and other chemical synthesis technologies, which has wider applicability and higher practicality.

[0042] Working principle of the present invention: The present invention provides a multifunctional microfluidic chip reaction device for preparing hydrogen peroxide, using photolithography technology to carve microfluidic channels and fine channels on the surface of the microfluidic chip 2 and open various holes, hot-pressing and bonding the cover sheet 1 to the surface of the microfluidic chip 2 so that the microfluidic channels form a closed pipeline, and embedding a piece of quartz wool 5 in the first liquid outlet hole 222 and the second liquid outlet hole 242, and then embedding the microfluidic chip reactor formed by bonding together in the second card slot 312 of the fixture body 31; screwing the joint body 321 into each threaded hole 313, and introducing corresponding reaction substances through the corresponding guide tubes 322 on the joint body 321, wherein the first introduction hole 221 and the second introduction hole 241 are twisted out of the joint body 321 after the catalyst particles are introduced, and a piece of quartz wool 5 is embedded in each;

[0043] When it is necessary to collect the prepared hydrogen peroxide in the first liquid outlet 222, the tube clamp 323 is used to clamp the conduit 322 under the second liquid outlet 242, so that pressure is formed in the effluent secondary mixing channel 23 and the second reaction microchannel 24, and the hydrogen peroxide cannot flow into them; similarly, when it is necessary to extract the prepared hydrogen peroxide in the second liquid outlet 242, the tube clamp 323 is used to clamp the conduit 322 under the first liquid outlet 222, so that the hydrogen peroxide flows downward through the effluent secondary mixing channel 23 for remixing and the second reaction microchannel 24 for rereaction, and finally flows to the second liquid outlet 242 for collection. The present invention has the technical characteristics of high oxidation reaction efficiency and low concentration in preparing hydrogen peroxide, and can select different liquid outlets to extract hydrogen peroxide according to actual conditions, thereby improving the flexibility of operation.

[0044] The above description is a detailed description of the preferred feasible embodiments of the present invention, but the embodiments are not intended to limit the scope of the patent application of the present invention. All equivalent changes or modified changes completed under the technical spirit suggested by the present invention should fall within the patent scope covered by the present invention.

Claims

1. A multifunctional microfluidic chip reaction device for preparing hydrogen peroxide, comprising a microfluidic chip reactor, wherein the microfluidic chip reactor comprises a cover sheet (1) and a microfluidic chip (2), wherein the cover sheet (1) is thermally bonded to the microfluidic chip (2), and wherein: It also includes a clamp mechanism (3) and a plurality of dams (4) arranged on the microfluidic chip (2), wherein the microfluidic chip reactor is embedded in the clamp mechanism (3). The microfluidic chip (2) comprises four sections of microfluidic channels and two sections of fine channels which are connected in sequence. The four sections of microfluidic channels are respectively a premixing microchannel (21), a first reaction microchannel (22), an effluent secondary mixing channel (23) and a second reaction microchannel (24). The premixing microchannel (21) is connected to the front end of the first reaction microchannel (22). One end of the effluent secondary mixing channel (23) is connected to the rear end of the first reaction microchannel (22), and the other end is connected to the front end of the second reaction microchannel (24). The microfluidic chip (2) is provided with two air inlet holes (25) and a liquid inlet hole (26). The liquid inlet hole (26) is provided at the front end of the premixing microchannel (21). The two air inlet holes (25) are respectively located on both sides of the liquid inlet hole (26) and are respectively connected to the premixing microchannel (21) through a section of the fine channel. The front end and the rear end of the first reaction microchannel (22) are respectively provided with a first inlet hole (221) and a first liquid outlet hole (222), and a dam (4) is provided on the first reaction microchannel (22) in front of the first inlet hole (221) and the first liquid outlet hole (222); the front end and the rear end of the second reaction microchannel (24) are respectively provided with a second inlet hole (241) and a second liquid outlet hole (242), and a dam (4) is provided on the second reaction microchannel (24) in front of the second inlet hole (241) and the second liquid outlet hole (242), The clamp mechanism (3) comprises a clamp body (31) and a plurality of joint components (32); the clamp body (31) is provided with a first card slot (311) and a second card slot (312) adapted to the microfluidic chip reactor; the first card slot (311) is located above the second card slot (312) and has a diameter larger than the second card slot (312); the microfluidic chip reactor is embedded in the second card slot (312); the bottom of the clamp body (31) is provided with a plurality of threaded holes (313) corresponding to the air inlet (25), the liquid inlet (26), the first introduction hole (221), the first liquid outlet (222), the second introduction hole (241) and the second liquid outlet (242), respectively; the joint components (32) are threadedly connected in the threaded holes (313); The joint assembly (32) comprises a joint body (321) with a hollow structure, a conduit (322) and a pipe clamp (323), wherein the conduit (322) is inserted into the joint body (321), and the pipe clamp (323) is clamped on the conduit (322). The first reaction microchannel (22) and the effluent secondary mixing channel (23) are both arranged in a wave curve structure, and the second reaction microchannel (24) is arranged in a straight line structure.

2. A multifunctional microfluidic chip reaction device for preparing hydrogen peroxide according to claim 1, characterized in that: The height of the plurality of dams (4) is smaller than the depth of the microfluidic channel.

3. A multifunctional microfluidic chip reaction device for preparing hydrogen peroxide according to claim 1, characterized in that: The first inlet hole (221), the first liquid outlet hole (222), the second inlet hole (241) and the second liquid outlet hole (242) are all inlaid with quartz wool (5).

4. A multifunctional microfluidic chip reaction device for preparing hydrogen peroxide according to claim 1, characterized in that: The cover sheet (1) and the microfluidic chip (2) can be made of one of PMMA, glass or metal materials.

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