Micro-fluidic chip for detecting formaldehyde in textile

Abstract

The utility model provides a micro-fluidic chip for detecting formaldehyde in textile, which comprises a rotating hole positioned in a central area and a plurality of detection units uniformly arranged along the circumferential direction, each detection unit is sequentially provided with a sample adding port, a chamber to be detected and a detection chamber from inside to outside, and the sample adding port, the chamber to be detected and the detection chamber are sequentially communicated; the sample adding port is used for placing a sample solution, the to-be-detected chamber is used for placing phloroglucinol in advance, and the detection chamber is used for placing sodium hydroxide in advance. The formaldehyde detection device can improve the simplicity and the detection efficiency of formaldehyde detection in textiles.

Description

Technical Field

[0001] The utility model relates to the technical field of formaldehyde detection in textiles, in particular to a microfluidic chip for formaldehyde detection in textiles. Background Art

[0002] During textile manufacturing, formaldehyde may be used as a finishing agent, color fixative, or cross-linking agent to improve properties such as wrinkle resistance, color fastness, and shrinkage resistance. However, excessive formaldehyde residues can cause adverse effects on human health, such as irritation to the skin, eyes, and respiratory tract. Therefore, accurately measuring formaldehyde content in textiles is crucial.

[0003] Colorimetry and chromatography are commonly used for quantitative analysis of formaldehyde in textiles. The color development / derivation and determination steps are separate, the operation steps are relatively cumbersome, and the efficiency of single sample detection is low. Utility Model Content

[0004] In order to solve the above problems in the prior art, the utility model provides a microfluidic chip for formaldehyde detection in textiles, so as to improve the simplicity and detection efficiency of formaldehyde detection in textiles.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] In a first aspect, the present invention provides a microfluidic chip for formaldehyde detection in textiles, comprising a rotating hole located in a central area and a plurality of detection units evenly arranged along the circumferential direction, wherein the detection units are sequentially provided with a sample addition port, a test chamber, and a detection chamber from the inside out, and the sample addition port, the test chamber, and the detection chamber are sequentially connected;

[0007] The sample addition port is used for placing a sample solution, the test chamber is used for pre-placing phloroglucinol, and the detection chamber is used for pre-placing sodium hydroxide.

[0008] The beneficial effects of this utility model are as follows: phloroglucinol is pre-embedded in the test chamber, and sodium hydroxide is pre-embedded in the detection chamber. When a sample solution is added to the sample inlet, the entire device rotates via the rotating hole, driving the fluid through centrifugal force, transferring the sample solution from the sample inlet to the test chamber and the detection chamber, thereby developing formaldehyde through the phloroglucinol system. This simplifies the operating steps and improves detection throughput and efficiency. Furthermore, the provision of multiple detection units further increases detection efficiency, thereby improving the simplicity and efficiency of formaldehyde detection in textiles.

[0009] Optionally, the detection unit further includes an air channel and an air hole, one end of the air channel is connected to the communication hole between the chamber to be tested and the detection chamber, and the other end is connected to the air hole;

[0010] The air hole is closer to the rotating hole than the sample adding port.

[0011] According to the above description, the air pressure inside the chip is balanced through the air holes.

[0012] Optionally, the air passage extends toward the center of the rotating hole.

[0013] Optionally, the sample addition port and the detection chamber are circular, the chamber to be tested is in a racetrack shape, and arc ends on both sides of the chamber to be tested are respectively connected to the sample addition port and the detection chamber.

[0014] Optionally, the diameter of the sample addition port is 1.0-3.0 mm, the width of the test chamber is 3.0-5.0 mm, and the diameter of the detection chamber is 5.0-10.0 mm.

[0015] Optionally, the sample addition ports, test chambers, and detection chambers on all detection units are respectively on a concentric circle;

[0016] On each detection unit, the arrangement direction of the sample addition port, the chamber to be tested, and the detection chamber is coaxial with the diameter of the concentric circle where the detection chamber is located.

[0017] Optionally, the communication hole between the chamber to be tested and the detection chamber is located in an upper area of ​​the chamber to be tested.

[0018] Optionally, the microfluidic chip is circular as a whole. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a three-dimensional schematic diagram of a microfluidic chip for detecting formaldehyde in textiles according to an embodiment of the present utility model;

[0020] Figure 2 for Figure 1 AA cross-section diagram in;

[0021] Figure 3 for Figure 1 Schematic diagram of the enlarged area B.

[0022] Description of reference numerals:

[0023] 1. Rotation hole;

[0024] 2. Detection unit; 21. Sample addition port; 22. Test chamber; 23. Detection chamber; 24. Airway; 25. Air hole; 26. Connecting hole. DETAILED DESCRIPTION

[0025] To better understand the above technical solution, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. Rather, these embodiments are provided to enable a clearer and more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0026] Example 1

[0027] Please refer to Figures 1 to 3 A microfluidic chip for formaldehyde detection in textiles includes a rotating hole 1 located in the central area and a plurality of detection units 2 evenly arranged along the circumferential direction. The detection unit 2 is provided with a sample addition port 21, a test chamber 22, and a detection chamber 23 from the inside out. The sample addition port 21, the test chamber 22, and the detection chamber 23 are sequentially connected. Figure 2 It can be seen that the communication hole 26 between the test chamber 22 and the detection chamber 23 is located in the upper area of ​​the test chamber 22 , that is, before rotation, the sample solution in the sample injection port 21 will not flow into the detection chamber 23 through the test chamber 22 .

[0028] like Figure 3 As shown, the detection unit 2 also includes an air channel 24 and an air hole 25. One end of the air channel 24 is connected to the connecting hole 26 between the test chamber 22 and the detection chamber 23, and the other end is connected to the air hole 25. The air channel 24 extends toward the center of the rotating hole 1, and the air hole 25 is closer to the rotating hole 1 than the sample injection port 21. Therefore, when the sample solution is added to the microfluidic chip, the air pressure inside the chip is balanced through the air hole 25.

[0029] In this embodiment, the microfluidic chip is circular as a whole, and the sample addition port 21, the test chamber 22 and the detection chamber 23 on all the detection units 2 are respectively on a concentric circle; on each detection unit 2, the arrangement direction of the sample addition port 21, the test chamber 22 and the detection chamber 23 is coaxial with the diameter of the concentric circle where the detection chamber 23 is located, so as to realize synchronous detection of all detection units 2.

[0030] Specifically, the microfluidic chip has 20 detection units 2, wherein the sample port 21, the detection chamber 23 and the air hole 25 are circular, the test chamber 22 is runway-shaped, and the arc ends on both sides of the test chamber 22 are connected to the sample port 21 and the detection chamber 23 respectively. Among them, the overall diameter of the microfluidic chip is 80mm, the diameter of the sample port 21 is 2mm, the width of the test chamber 22 is 3.4mm, the diameter of the detection chamber 23 is 5.94mm, and the diameter of the air hole 25 is 1.5mm. In other equivalent embodiments, the diameter of the sample port 21 is 1.0-3.0mm, the width of the test chamber 22 is 3.0-5.0mm, the diameter of the detection chamber 23 is 5.0-10.0mm, and the diameter of the air hole 25 is 1.4-1.6mm.

[0031] Thus, the test chamber 22 is used to pre-place phloroglucinol, and the detection chamber 23 is used to pre-place sodium hydroxide. Both are pre-embedded in the detection unit 2 by simple drying. When the sample solution is added to the sample inlet 21, the entire unit rotates through the rotating hole 1, driving the fluid through centrifugal force, and transferring the sample solution from the sample inlet 21 to the test chamber 22 and the detection chamber 23.

[0032] It should be noted that when the microfluidic chip of this embodiment is used in a microfluidic speed meter, a corresponding rotating mechanism is provided on the microfluidic speed meter to be connected to the rotating hole 1 to drive the microfluidic chip to rotate; the microfluidic speed meter is provided with a corresponding cover plate covering the microfluidic chip except for the position of the rotating hole 1 on the microfluidic chip, and the cover plate is provided with through holes at the positions corresponding to the air holes 25 and the sample addition port 21 to add sample solution and discharge gas; at the same time, a flow resistance valve is also provided between adjacent detection units 2 for isolation, thereby realizing separate detection of each detection unit 2.

[0033] Therefore, the utility model uses the phloroglucinol system to perform formaldehyde color development, and increases the detection efficiency by designing multiple detection units 2. For each detection unit 2, the fluid is driven by centrifugal force, thereby simplifying the operation steps and improving the detection flux and efficiency, thereby improving the simplicity and detection efficiency of formaldehyde detection in textiles.

[0034] In the description of this utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0035] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0036] In the present invention, unless otherwise expressly specified or limited, when a first feature is “above” or “below” a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, when a first feature is “above,” “above,” or “above” a second feature, it may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is “below,” “below,” or “below” a second feature, it may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0037] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "embodiment", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0038] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations on the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A microfluidic chip for detecting formaldehyde in textiles, characterized in that: The device comprises a rotating hole in the central area and a plurality of detection units evenly arranged along the circumferential direction, wherein the detection units are provided with a sample addition port, a test chamber and a detection chamber in sequence from the inside to the outside, and the sample addition port, the test chamber and the detection chamber are connected in sequence; The sample addition port is used for placing a sample solution, the test chamber is used for pre-placing phloroglucinol, and the detection chamber is used for pre-placing sodium hydroxide.

2. The microfluidic chip for detecting formaldehyde in textiles according to claim 1, characterized in that: The detection unit further includes an air channel and an air hole, one end of the air channel is connected to the communication hole between the chamber to be tested and the detection chamber, and the other end is connected to the air hole; The air hole is closer to the rotating hole than the sample adding port.

3. The microfluidic chip for detecting formaldehyde in textiles according to claim 2, characterized in that: The air passage extends toward the center of the rotating hole.

4. The microfluidic chip for detecting formaldehyde in textiles according to claim 1, characterized in that: The sample adding port and the detection chamber are circular, the chamber to be tested is in a racetrack shape, and arc ends on both sides of the chamber to be tested are respectively connected to the sample adding port and the detection chamber.

5. The microfluidic chip for detecting formaldehyde in textiles according to claim 4, characterized in that: The diameter of the sample addition port is 1.0-3.0 mm, the width of the test chamber is 3.0-5.0 mm, and the diameter of the detection chamber is 5.0-10.0 mm.

6. The microfluidic chip for formaldehyde detection in textiles according to claim 1, characterized in that: The sample injection port, test chamber and detection chamber on all detection units are respectively on a concentric circle; On each detection unit, the arrangement direction of the sample addition port, the chamber to be tested, and the detection chamber is coaxial with the diameter of the concentric circle where the detection chamber is located.

7. The microfluidic chip for formaldehyde detection in textiles according to claim 1, characterized in that: The communication hole between the chamber to be tested and the detection chamber is located in the upper area of ​​the chamber to be tested.

8. The microfluidic chip for detecting formaldehyde in textiles according to any one of claims 1 to 7, characterized in that: The microfluidic chip is circular in shape as a whole.

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