Observation device and observation system for observing nucleation of polyurethane bubbles

Abstract

The utility model relates to the technical field of polyurethane, in particular to an observation device and an observation system for observing polyurethane bubble nucleation. The observation device comprises an annular sample holder for placing an observation sample, a heating device for heating the observation sample to promote nucleation and an optical device for observing the bubble nucleation process in the sample, and the annular sample holder is arranged in the heating device and is connected with the heating device; the optical device is arranged on one side of the annular sample holder and is used for observing the bubble nucleation process of the observation sample placed on the annular sample holder. According to the invention, the nucleation process of the polyurethane bubbles can be directly observed, then the nucleation capability of the foam stabilizer of a polyurethane system can be rapidly evaluated, and the foam stabilizing capability and functionality of the foam stabilizer can be judged by intuitively observing the mutual bubble merging process after the bubbles are formed and the final form.

Description

Technical Field

[0001] This utility model relates to the field of polyurethane technology, and more specifically, to an observation device and system for observing the nucleation of polyurethane bubbles. Background Technology

[0002] Rigid polyurethane foam is widely used in home appliances, construction, and automobiles due to its excellent thermal insulation and sound absorption properties. Rigid polyurethane is typically produced by reacting polyether or polyester polyols and polyisocyanates, and then promoting foaming with a blowing agent. Blowing agents are classified as physical blowing agents and chemical blowing agents (usually water). Water is added to the polyol component as a chemical blowing agent, while carbon dioxide is a reaction product. Physical blowing agents are typically low-boiling-point liquids such as pentane and HFCs. When the active components react exothermically, the gas evaporates, thereby promoting foaming.

[0003] Rigid polyurethane foam possesses important properties in its applications, including thermal conductivity, compressive strength, sound absorption, dimensional stability, and fire resistance. These properties are closely related to foam density and morphology (including bubble size distribution, open and closed cells, and solid components in the supports and walls). Foam stabilizers are indispensable components in the production of polyurethane foams. They promote nucleation, emulsify foam materials, stabilize the foam, and regulate cell size. They increase the miscibility of components, facilitate bubble formation, and control cell size and uniformity. However, different foam stabilizers have varying effects on bubbles. Currently, surface tension meters are mainly used to test the effect of different foam stabilizers on surface tension, but there is no good method for observing the changes in bubbles caused by different foam stabilizers in polyurethane systems. Therefore, a new device is needed to directly observe changes in bubbles in polyurethane systems, thereby enabling the evaluation of polyurethane foam systems. Utility Model Content

[0004] The purpose of this invention is to provide an observation device and system for observing polyurethane bubble nucleation, which can directly observe the polyurethane bubble nucleation process and thus enable rapid evaluation of the polyurethane system.

[0005] The embodiments of this utility model can be implemented as follows:

[0006] In a first aspect, the present invention provides an observation device for observing polyurethane bubble nucleation, comprising an annular sample holder for placing an observation sample, a heating device for heating the observation sample to promote nucleation, and an optical device for observing the bubble nucleation process in the sample. The annular sample holder is disposed within and connected to the heating device, and the optical device is disposed on one side of the annular sample holder and observes the bubble nucleation process of the observation sample placed on the annular sample holder.

[0007] In an optional embodiment, the heating device includes an annular protective shell, and the annular sample holder is disposed in the inner ring of the annular protective shell and connected to the inner ring of the annular protective shell.

[0008] In an optional embodiment, the annular protective shell is a hollow cylinder;

[0009] The heating device includes a ceramic electric heating coil, which is disposed inside the hollow cylinder.

[0010] Ceramic electric heating coils are made by threading alloy heating wires through ceramic strips.

[0011] In an optional embodiment, a temperature sensor is provided on the inner ring of the annular protective shell, and the temperature sensor is located above the annular sample holder.

[0012] In an optional embodiment, a rounded rectangular heat dissipation vent is provided on one side of the annular protective shell, and the rounded rectangular heat dissipation vent is arranged circumferentially along the annular protective shell.

[0013] In an optional embodiment, the observation device further includes an electrical control box for controlling the switching of the heating device and the heating temperature, the electrical control box being connected to the heating device;

[0014] The electrical control box is equipped with a temperature display, a temperature control switch, a time control switch, and a power switch.

[0015] In an optional embodiment, the observation device further includes a lifting platform for adjusting the height of the optical device, the lifting platform being connected to the optical device.

[0016] In an optional embodiment, the observation device further includes a lifting assembly for adjusting the raising and lowering of the heating device, the lifting assembly being connected to the heating device;

[0017] The lifting assembly includes a lifting rod and a support rod that can be raised and lowered. One end of the support rod is connected to the heating device, and one end of the support rod is connected to the lifting rod.

[0018] In an optional embodiment, a circular support plate is provided on the lifting rod, and the circular support plate is connected to the support rod.

[0019] Secondly, this utility model provides an observation method for observing polyurethane bubble nucleation, including a heat-resistant transparent vessel and the observation device for observing polyurethane bubble nucleation described in the foregoing embodiments, wherein the heat-resistant transparent vessel is disposed on the annular sample holder.

[0020] The beneficial effects of the observation device and system for observing polyurethane bubble nucleation provided in this embodiment include: This invention uses a heating device to promote nucleation, making experimental conditions more controllable and reducing experimental errors. Commonly used stirring nucleation methods easily introduce a large number of air bubbles, and stirring can cause sample splashing, making it difficult to observe the bubbles in the system. Simultaneously, this invention provides heat to promote polyurethane system nucleation. By capturing the size and quantity of bubbles using an optical device, the nucleation ability of the polyurethane foam stabilizer can be determined. Furthermore, the process of bubble coalescence after formation can be directly observed to assess the foam stabilization ability and functionality of the foam stabilizer based on the final morphology. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the observation device provided in this embodiment;

[0023] Figure 2 This is a schematic diagram of the heating device provided in this embodiment;

[0024] Figure 3 This is a side view structural schematic diagram of the observation device provided in this embodiment;

[0025] Figure 4 This is a frontal structural schematic diagram of the observation device provided in this embodiment.

[0026] Icons: 100-Observation device; 110-Support platform; 120-Lifting assembly; 121-Lifting rod; 122-Lifting knob box; 123-Lifting knob; 124-Support rod; 130-Heating device; 131-Annular protective shell; 132-Ceramic heating coil; 133-Alloy heating wire; 134-Ceramic strip; 135-Rounded rectangular heat dissipation vent; 136-Temperature probe; 140-Electrical control box; 141-Temperature display; 142-Temperature control switch; 143-Time control switch; 144-Power switch; 150-Annular sample rack; 160-Circular tray; 170-Optical device; 171-Lifting platform; 172-Handle. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0029] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0030] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed during use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0031] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0032] It should be noted that, where there is no conflict, the features in the embodiments of this utility model can be combined with each other.

[0033] Example 1

[0034] Please refer to Figure 1 The present invention provides an observation device 100 for observing polyurethane bubble nucleation, which includes a support platform 110 for mounting other equipment of the observation device 100 and facilitating the movement of the observation device 100. In this embodiment of the present invention, the support platform 110 is a cuboid.

[0035] The observation device 100 also includes a lifting assembly 120, which includes a lifting rod 121 capable of being raised and lowered. The lifting rod 121 is 10-20 cm in length and can be a rod that can be raised and lowered using existing technology. One end of the lifting rod 121 is connected to the support platform 110.

[0036] The lifting rod 121 is provided with a lifting knob box 122, and the lifting knob box 122 is provided with a lifting knob 123. The lifting knob 123 is connected to the lifting rod 121, and the lifting and lowering of the lifting rod 121 can be controlled by the lifting knob 123.

[0037] The lifting assembly 120 also includes a support rod 124, one end of which is connected to the lifting rod 121. The support rod 124 rises and falls with the lifting rod 121. Specifically, the support rod 124 is connected to the lifting knob box 122.

[0038] The observation device 100 also includes a heating device 130 for heating the observed sample to promote nucleation, and the heating device 130 is connected to one end of the support rod 124.

[0039] Specifically, see Figure 2 The heating device 130 includes an annular protective shell 131, which is a hollow cylinder, for example, in this embodiment of the invention, the annular protective shell 131 is a hollow cylinder. The inner diameter of the hollow cylinder is 10-25 cm, and the height is 6-15 cm. A ceramic heating coil 132 is disposed inside the annular protective shell 131, that is, the ceramic heating coil is disposed inside the hollow cylinder; the ceramic heating coil is made by threading an alloy heating wire 133 through a ceramic strip 134. The heating device 130 has a power of 150W to 300W.

[0040] Furthermore, a rounded rectangular heat dissipation vent 135 is provided on one side of the annular protective shell 131, and the rounded rectangular heat dissipation vent 135 is arranged circumferentially around the annular protective shell 131. For example, in this embodiment of the present invention, the rounded rectangular heat dissipation vent 135 is provided on the top of the annular protective shell 131 and is arranged circumferentially.

[0041] It should be noted that descriptions such as "top" or "above" refer to the relatively horizontal ground.

[0042] A temperature sensor 136 is provided on the inner ring of the annular protective shell 131 to monitor the heating temperature of the heating device 130.

[0043] Further, see Figure 1 and Figure 4The observation device 100 also includes an electrical control box 140 for controlling the switch of the heating device 130 and the heating temperature. The electrical control box 140 is connected to the heating device 130. Specifically, the electrical control box 140 is connected to the outer wall of the annular protective shell 131. Preferably, in this embodiment, the electrical control box 140 is connected to the side of the annular protective shell 131 that is away from the support rod 124.

[0044] Furthermore, the electrical control box 140 is equipped with a temperature display 141, a temperature control switch 142, a time control switch 143, and a power switch 144. Specifically, the electrical control box 140 is connected to the temperature sensor 136 and the ceramic electric heating coil circuit to realize temperature monitoring.

[0045] Furthermore, the observation device 100 also includes an annular sample holder 150 for placing the observation sample. The annular sample holder 150 is disposed within and connected to the heating device 130. Specifically, the annular sample holder 150 is disposed within the inner ring of the annular protective shell 131 and connected to the inner ring of the annular protective shell 131. The annular sample holder 150 is 3-5 cm above the bottom of the annular protective shell 131, and the inner ring diameter of the annular sample holder 150 is 5-15 cm.

[0046] Furthermore, the annular sample holder 150 is located below the temperature sensing probe 136, meaning that the temperature sensing probe 136 is located above the annular sample holder 150, thereby enabling temperature monitoring.

[0047] Furthermore, since the heating device 130 is located at one end of the support rod 124, its weight is relatively heavy, making it prone to detachment or slippage, which could damage the heating device 130 or the equipment below it. Therefore, this embodiment of the invention provides a circular support plate 160, which is connected to the lifting rod 121, specifically to the lifting knob box 122, thereby providing some support for the heating device 130, etc. The circular support plate 160 has a height of 15-40cm and a diameter of 5-20cm.

[0048] Further, see Figure 1 , Figure 3 and Figure 4 The observation device 100 further includes an optical device 170 for observing the bubble nucleation process in the sample. Specifically, the optical device 170 is disposed on one side of the annular sample holder 150 and observes the bubble nucleation process of the sample placed on the annular sample holder 150. In a utility model embodiment, the optical device 170 is disposed below the annular sample holder 150, thereby enabling observation of the bubble nucleation process of the sample above. The optical device 170 can be a microscope or a camera.

[0049] Furthermore, the observation device 100 also includes a lifting platform 171 for adjusting the height of the optical device 170. The lifting platform 171 is connected to the optical device 170 and to the support platform 110, thereby enabling the optical device 170 to be raised and lowered more directly and accurately to observe the bubble nucleation process of the observed sample.

[0050] A handle 172 is provided on one side of the lifting platform 171 to control the height of the lifting platform 171. The specific structure of the lifting platform 171 can be found in the structure of existing platforms that can achieve lifting.

[0051] This utility model provides an observation method for observing polyurethane bubble nucleation, including a heat-resistant transparent vessel and the observation device 100 for observing polyurethane bubble nucleation as described in the aforementioned embodiment, wherein the heat-resistant transparent vessel is disposed on the annular sample holder 150.

[0052] Specifically, the diameter of the heat-resistant transparent container is 3-5 cm larger than the inner diameter of the annular sample holder 150, and its height is 2-5 cm higher than the top of the annular protective shell 131, which makes it easier for operators to handle the heat-resistant transparent container.

[0053] The above description is only a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model.

Claims

1. An observation device for observing polyurethane bubble nucleation, characterized by, The observation device comprises a ring-shaped sample holder for placing an observation sample, a heating device for heating the observation sample to promote nucleation, and an optical device for observing the bubble nucleation process in the observation sample, wherein the ring-shaped sample holder is arranged in and connected to the heating device, and the optical device is arranged on one side of the ring-shaped sample holder and observes the bubble nucleation process of the observation sample placed on the ring-shaped sample holder.

2. The apparatus for observing polyurethane bubble nucleation of claim 1, wherein, The heating device comprises a ring-shaped protective shell, and the ring-shaped sample holder is arranged in and connected to the inner ring of the ring-shaped protective shell.

3. The apparatus for observing polyurethane bubble nucleation of claim 2, wherein, The ring-shaped protective shell is a hollow cylinder, The heating device comprises a ceramic electric heating coil arranged in the hollow cylinder. The ceramic electric heating coil is made of alloy heating wire passing through a ceramic strip.

4. The apparatus for observing polyurethane bubble nucleation of claim 2, wherein, The inner ring of the ring-shaped protective shell is provided with a temperature sensing probe, and the temperature sensing probe is located above the ring-shaped sample holder.

5. The apparatus for observing polyurethane bubble nucleation of claim 2, wherein, One side of the ring-shaped protective shell is provided with a round rectangular heat dissipation hole, which is arranged in a circumferential ring along the ring-shaped protective shell.

6. The apparatus for observing polyurethane bubble nucleation of claim 1, wherein, The observation device further comprises an electrical control box for controlling the switch of the heating device and the heating temperature, and the electrical control box is connected to the heating device. The electrical control box is provided with a temperature display, a temperature control switch, a time control switch and a power switch.

7. The apparatus for observing polyurethane bubble nucleation of claim 1, wherein, The observation device further comprises a lifting platform for adjusting the height of the optical device, and the lifting platform is connected to the optical device.

8. The apparatus for observing polyurethane bubble nucleation of claim 1, wherein, The observation device further comprises a lifting assembly for adjusting the height of the heating device, and the lifting assembly is connected to the heating device. The lifting assembly comprises a lifting rod and a support rod, one end of the support rod is connected to the heating device, and a section of the support rod is connected to the lifting rod.

9. The apparatus for observing polyurethane bubble nucleation of claim 8, wherein, A circular supporting plate is arranged on the lifting rod, and the circular supporting plate is connected to the support rod.

10. An observation system for observing polyurethane bubble nucleation, characterized by, The observation device for observing the bubble nucleation of polyurethane comprises a heat-resistant transparent container and the observation device for observing the bubble nucleation of polyurethane according to claim 1, and the heat-resistant transparent container is arranged on the ring-shaped sample holder.

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