Method for determinating semi-volatile organic compound emission parameters of indoor and in-vehicle materials

Abstract

The invention relates to a method for determinating semi-volatile organic compound emission parameters of indoor and in-vehicle materials, and belongs to the field of indoor and in-vehicle environmentinspection. The method comprises the following steps: building a physical model; placing the indoor and in-vehicle materials to be tested in an environmental chamber capable of strictly controlling the temperature and the humidity, inflating a certain flow to enable the materials to freely emit semi-volatile organic compounds till a quasi-steady state, and measuring the quasi-steady-state SVOC concentration value under the flow; changing the flow inflated into the environmental chamber for several times, and working out a series of quasi-steady-state concentration values corresponding to different flows; then, according to the physical model, calculating emission parameters such as the gas-phase SVOC concentration at a material interface and the convective mass transfer coefficient on thematerial surface in the emission process of the indoor and in-vehicle materials. By the method, operation is convenient, the test cycle is short and the precision is relatively high; the method is suitable for laboratory detection and engineering application.

Description

Technical field [0001] The invention belongs to the technical field of indoor vehicle interior environment inspection, and particularly relates to a method capable of realizing the determination of semi-volatile organic compound emission parameters in indoor vehicle interior materials. Background technique [0002] The problem of air pollution caused by semi-volatile organic compounds (SVOC) in the indoor environment of the car has attracted widespread attention. The SVOC in the indoor environment is mainly derived from plasticizers and flame retardants added to home decoration materials and automotive interior materials, which will gradually be distributed into the air and have a serious negative impact on human health. Due to its high boiling point and low saturated vapor pressure, SVOC is easily adsorbed by suspended particles in the environment, various surfaces in indoor cars and even the human body. Long-term exposure to an environment containing SVOC will affect the human ...

AI Technical Summary

Problems solved by technology

Since the gas phase concentration of SVOC in the environment is low, and it is easy to be adsorbed by various surfaces, the accurate determination of y 0 and h m The value is more difficult

At present, the direct current environmental chamber method is mainly used to measure the emission parameters of SVOC in materials, such as the air quality research experiment chamber method (CLIMPAQ) and the field and laboratory emission chamber method (FLEC). Due to the small diffusion coefficient of SVOC and the low emission rate, And it is very easy to be adsorbed by the inner wall of the environmental chamber. These methods generally have the defects of large measurement error and long test time, which greatly restricts the popularization and application of the method.

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