Method for predicting release concentration of formaldehyde in decorative materials under conditions of different temperature and humidity

Abstract

The invention relates to the technical field of decorative materials detection, and discloses a method for predicting the release concentration of the formaldehyde in decorative materials under conditions of the different temperature and humidity. The method comprises steps of: performing fitting on the temperature and humidity coefficients, according to the existing formaldehyde concentration data and an equation (7); measuring the formaldehyde release concentration by the spectrophotometry or the like for the materials placed in an environmental chamber, recording data for 24 hours, and recording the temperature and humidity data of the environment chamber in the measurement process at the same time; drawing a measured concentration curve over time, and obtaining an emission coefficientk and a limiting concentration C0 by data fitting, according to the exponential law of the formula (5); and substituting the bearing rate L, the prediction time t, the limiting concentration C0, the emission coefficient k, the predicted temperature T, and the predicted humidity RH into the prediction equation (7), so that the formaldehyde release concentration of the material under the condition of predicting indoor temperature and humidity is calculated, and the prediction is finished. According to the method for predicting the release concentration of the formaldehyde in decorative materialsunder conditions of different temperature and humidity, the method has the advantage of predicting the release concentration of the formaldehyde in the building decorative materials under conditionsof different temperature and humidity.

Description

technical field [0001] The invention relates to the technical field of detection of decorative materials, in particular to a method for predicting the formaldehyde emission concentration of decorative materials under different temperature and humidity conditions. Background technique [0002] The release of indoor volatile organic compounds will lead to poor indoor air quality. If the pollution is serious, it will worsen the indoor air quality and cause various adverse symptoms, such as dizziness, fatigue, itchy skin and other symptoms, that is, sick building syndrome; among them, formaldehyde Pollution is very common in civil buildings, and many decoration and decoration materials will release formaldehyde to the surrounding environment. Our country's regulations ("Code for Indoor Environmental Pollution Control of Civil Construction Engineering GB 50325-2010") have put forward requirements for the indoor formaldehyde concentration of civil buildings. [0003] In the field ...

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Problems solved by technology

[0006] Aiming at the deficiencies of the prior art, the present invention provides a method for predicting the formaldehyde release concentration of building decoration materials under different temperature and humidity conditions, which has the advantage of predicting the formaldehyde release concentration of building decoration materials under different temperature and humidity conditions, and solves the problems of the past. Concentration measurement based on a single temperature and humidity cannot be satisfied, and the diversity of actual indoor conditions may seriously underestimate the indoor formaldehyde hazard after decoration under unfavorable conditions, and cannot provide timely adjustments to decoration schemes and material selection question of exact basis

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