Research on environmental warehouses at home and abroad
Domestic and foreign research on history and status quo. Foreign research on environmental storage is relatively early and the level is relatively advanced. As early as 1985, the American Composite Panel Association introduced a large cabin method J to measure the amount of formaldehyde released from wood. A year later, the American Chemical Society introduced a large-scale test chamber method l4J for urea-formaldehyde composite wood products. Currently the United States is now. fSl~9 environmental chamber standard has a small-size environmental chamber method to study the release of harmful substances from indoor materials fD5116-10) [51; full-size environmental chamber method to study the release of harmful substances from indoor materials (D6670-01) I_Large climate chamber method test Formaldehyde emission from wood products~_(ASTME1333); Test method for volatile compounds emitted in office furniture systems, components and seats (BIFMAM7.1) Old J. Among them, BIFMAN7.1 is the national standard.
Developed countries in Europe, Japan, and South Korea in Asia have also established environmental chamber standards in their own environmental systems. For example, the determination of formaldehyde emission from wood substrates in the United Kingdom-Part B: Determination of formaldehyde emission by indoor method (ENV717 —1—1998), building products lag~u set a part 2: release test box}~ (ENV13419-2—1999), the release rate of formaldehyde and volatile organic compounds from building interior products in Korea Standard measurement method (KSM-1998) J. Related foreign scientific researchers have also done a lot of research on this. Brown. S. Kl. The cabin for measuring the emission of formaldehyde and TVOC in wood-based panels was evaluated, and the main emission sources of formaldehyde ~ nTVOC in different boards were discussed, which provided a theoretical basis for reducing the emission of formaldehyde and TVOC in products. Yan from MIT did a systematic theoretical study on the emission of coatings on the substrate. He pointed out that previous studies focused on the gas evaporation process, ignoring the internal diffusion of the gas, so it has a significant impact on the release rate of the substrate and the coating’s effects.
Research and mathematical simulation of the entire release of gas-solid surface and gas, to have a more accurate understanding of the entire release process. The development of the environmental chamber is close to maturity, and various parameters of the environmental chamber can be well controlled.
The environmental chamber has been able to simulate the indoor environment very well, and it plays an irreplaceable role in the indoor product release test. Foreign countries have become more and more mature in this regard, and related standards for the release of various indoor products have been promulgated: Although my country has invested a lot in research on environmental cabins, the application level is lagging, and it is used in the development of standards for the release of indoor products in environmental cabins. There is still a lot of work to be done.
