Determination method of outgassing products of materials in sealed cabin of manned spacecraft

Abstract

The present invention provides a method for measuring the outgassing products of materials in a sealed cabin of a manned spacecraft, the method comprising: (1) pre-treating a test material to prepare a test sample, the pre-treating comprising coating the test material on both sides of a substrate with a preset thickness, the substrate being an aluminum substrate or a preset substrate; or, the pre-treating comprising cutting the test material into a preset size; (2) cleaning and drying the test sample, and weighing and marking it; (3) weighing the test sample again and placing it in a prepared sealed sample container, replacing the gas in the sample container with the test gas; (4) placing the sample container in a test box, heating it to 48°C to 52°C, and maintaining it for a preset time; (5) cooling it to room temperature, and sampling and analyzing the outgassing products released by the test material. The method can provide support for material selection and air environment control of a sealed cabin of a manned spacecraft.

Description

Technical Field

[0001] The invention belongs to the field of detection technology, and in particular relates to a method for measuring outgassing products of materials in a sealed cabin of a manned spacecraft. Background Art

[0002] The sealed cabin of a manned spacecraft is a safety device that ensures that people can live or work in orbit at high altitudes or in outer space. The interior is a sealed environment. To ensure safety and comfort, it is necessary to artificially create air environment conditions similar to those on the ground. Various materials are involved in the preparation and installation of the sealed cabin. The materials will inevitably release organic or inorganic gases, affecting the air environment conditions in the sealed cabin. In the sealed environment of the sealed cabin of a manned spacecraft, organic or inorganic gas pollutants in the air environment are toxic to a certain extent, posing a potential danger to the safety of astronauts.

[0003] Therefore, it is necessary to measure the outgassing products of materials in the sealed cabin of manned spacecraft, such as composition, content, outgassing rate, etc., to provide support for material selection and air environment control of the sealed cabin of manned spacecraft, for toxicological risk assessment of humans, and to ensure that the sealed cabin of manned spacecraft can provide a suitable air environment for astronauts to survive in orbit and meet the requirements of space medicine. Summary of the invention

[0004] The purpose of the present invention is to overcome at least one disadvantage of the above-mentioned prior art and to provide a method for measuring the outgassing products of materials in a sealed cabin of a manned spacecraft which is easy to operate and accurate.

[0005] In order to solve the above technical problems, the present invention provides a method for measuring outgassing products of materials in a sealed cabin of a manned spacecraft, the main feature of which is that the measuring method comprises:

[0006] (1) Pre-treating the test material to prepare a test sample, wherein the pre-treating comprises coating the test material on both sides of a substrate with a preset thickness, wherein the substrate is an aluminum substrate or a preset substrate; or, the pre-treating comprises cutting the test material into a preset size;

[0007] (2) Clean and dry the test samples, and weigh and label them;

[0008] (3) Weigh the test sample again and place it in the prepared sealed sample container, and replace the gas in the sample container with the test gas;

[0009] (4) placing the sample container in a test chamber, heating it to 48° C. to 52° C., and maintaining it for a preset time;

[0010] (5) Cooling to room temperature, and sampling and analyzing the gas products released from the test material.

[0011] Preferably, when the test material is a coating, primer, ink, paint, adhesive, or lubricant test material, a coating pretreatment is performed, and when the test material is a fabric, film, elastometer, or non-adhesive tape test material, a cutting pretreatment is performed.

[0012] Preferably, the sample container comprises a gas collection interface for collecting gas samples.

[0013] Preferably, the sample container is prepared by the following method: the sample container is cleaned by heating and blown out with air or nitrogen before use, and before the test sample is placed in the sample container, the test gas is injected into the sample container and maintained at 48°C to 52°C for 71 to 73 hours, or maintained at 68°C to 72°C for 24 hours.

[0014] Preferably, the test gas consists of oxygen and nitrogen, or oxygen and argon, and the volume percentage of oxygen is not less than (20.9±2.0)%.

[0015] Preferably, the test chamber is provided with a temperature probe.

[0016] Preferably, the test sample is cleaned by removing particles therefrom using nitrogen gas.

[0017] Preferably, the preset time is 71 to 73 hours.

[0018] Preferably, the ratio of the mass of the test sample to the volume of the test box is 4.75-5.25 g / L.

[0019] The method for measuring outgassing products of materials in a sealed cabin of a manned spacecraft of the present invention is easy to operate and has high accuracy, and can provide support for material selection and air environment control of the sealed cabin of a manned spacecraft. DETAILED DESCRIPTION

[0020] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific embodiments.

[0021] The experimental methods described in the following examples are conventional methods unless otherwise specified; the reagents or consumables involved can be obtained through commercial channels unless otherwise specified.

[0022] Example 1

[0023] The method for measuring the outgassing products of materials in a sealed cabin of a manned spacecraft in this embodiment includes the following specific steps:

[0024] (1) Pre-treating a primer test material to prepare a test sample, wherein the pre-treatment is to coat the primer test material with a certain thickness on both sides of a substrate, wherein the substrate is an aluminum substrate;

[0025] (2) Cleaning and drying the test sample, using nitrogen to remove particles from the clean primer test sample, and weighing and labeling the sample;

[0026] (3) Weigh the primer test material again and place it in the prepared sealed sample container. The gas in the sample container can be replaced with the test gas by evacuation. The ratio of the mass of the test sample to the volume of the test chamber is 5.00 g / L.

[0027] Prepare the sample container by the following method: clean the sample container by heating and purge it with nitrogen before use, inject the test gas into the sample container before placing the test sample in the sample container, and keep it at 50℃ for 72h; the test gas is composed of oxygen and nitrogen, and the volume percentage of oxygen is 22.9%;

[0028] (4) placing the sample container in a test chamber, heating it to 50° C., and maintaining it for a preset time of 72 hours; the test chamber is provided with a temperature probe to detect and record the temperature;

[0029] (5) Cooling to room temperature of 25°C, sampling and analyzing the gaseous products released by the test material, wherein the sample container includes a gas collection interface for collecting gas samples, and the analysis includes analysis of key components such as formaldehyde, carbon monoxide and ammonia. The results show that the gaseous products of the primer test material meet the requirements.

[0030] Example 2

[0031] The method for measuring the outgassing products of materials in a sealed cabin of a manned spacecraft in this embodiment includes the following specific steps:

[0032] (1) Pre-treating the thin film test material to prepare a test sample, wherein the pre-treating is to cut the thin film test material into small pieces so that the ratio of the mass of the test sample to the volume of the test box is 5.00 g / L;

[0033] (2) Cleaning and drying the test sample, using nitrogen to remove particles from the clean primer test sample, and weighing and labeling the sample;

[0034] (3) Weigh the film test material again and place it in the prepared sealed sample container. The gas in the sample container can be replaced with the test gas by evacuating the container;

[0035] Prepare the sample container by the following method: clean the sample container by heating and purge it with nitrogen before use, inject the test gas into the sample container before placing the test sample in the sample container, and keep it at 50℃ for 72h; the test gas is composed of oxygen and nitrogen, and the volume percentage of oxygen is 22.9%;

[0036] (4) placing the sample container in a test chamber, heating it to 50° C., and maintaining it for a preset time of 72 hours; the test chamber is provided with a temperature probe to detect and record the temperature;

[0037] (5) Cooling to room temperature of 25°C, sampling and analyzing the gas products released by the test material, wherein the sample container includes a gas collection interface for collecting gas samples, and the analysis includes analysis of key components such as formaldehyde, carbon monoxide and ammonia. The results show that the gas products of the film test material meet the requirements.

[0038] The method for measuring outgassing products of materials in a sealed cabin of a manned spacecraft of the present invention is easy to operate and has high accuracy, and can provide support for material selection and air environment control of the sealed cabin of a manned spacecraft.

[0039] In this specification, the present invention has been described with reference to specific embodiments thereof. However, it is apparent that various modifications and variations may be made without departing from the spirit and scope of the present invention. Therefore, the description should be regarded as illustrative rather than restrictive.

Claims

1. A method for measuring outgassing products of materials in a sealed cabin of a manned spacecraft, characterized in that: The determination method comprises: (1) Pre-treating the test material to prepare a test sample, wherein the pre-treating comprises coating the test material on both sides of a substrate with a preset thickness, wherein the substrate is an aluminum substrate or a preset substrate; or, the pre-treating comprises cutting the test material into a preset size; (2) Clean and dry the test samples, and weigh and label them; (3) Weigh the test sample again and place it in the prepared sealed sample container, and replace the gas in the sample container with the test gas; (4) placing the sample container in a test chamber, heating it to 48° C. to 52° C., and maintaining it for a preset time; (5) Cooling to room temperature, and sampling and analyzing the gas products released from the test material.

2. The method for measuring outgassing products of materials in a sealed cabin of a manned spacecraft according to claim 1, characterized in that: When the test material is a coating, primer, ink, paint, adhesive, or lubricant test material, a coating pretreatment is performed; when the test material is a fabric, film, elastic meter, or non-adhesive tape test material, a cutting pretreatment is performed.

3. The method for measuring outgassing products of materials in a sealed cabin of a manned spacecraft according to claim 1, characterized in that: The sample container comprises a gas collection interface for collecting gas samples.

4. The method for measuring outgassing products of materials in a sealed cabin of a manned spacecraft according to claim 1, characterized in that: Prepare the sample container by the following method: clean the sample container by heating and blow it with air or nitrogen before use, inject the test gas into the sample container before placing the test sample in the sample container, and keep it at 48℃~52℃ for 71~73h, or keep it at 68℃~72℃ for 24h.

5. The method for measuring outgassing products of materials in a sealed cabin of a manned spacecraft according to claim 1, characterized in that: The test gas is composed of oxygen and nitrogen, or oxygen and argon, and the volume percentage of oxygen is not less than (20.9±2.0)%.

6. The method for measuring outgassing products of materials in a sealed cabin of a manned spacecraft according to claim 1, characterized in that: The test box is provided with a temperature probe.

7. The method for measuring outgassing products of materials in a sealed cabin of a manned spacecraft according to claim 1, characterized in that: The test samples were cleaned by removing particles using nitrogen gas.

8. The method for measuring outgassing products of materials in a sealed cabin of a manned spacecraft according to claim 1, characterized in that: The preset time is 71 to 73 hours.

9. The method for measuring outgassing products of materials in a sealed cabin of a manned spacecraft according to claim 1, characterized in that: The ratio of the mass of the test sample to the volume of the test box is 4.75-5.25 g / L.