The measurement of the sorption isotherm of water in paint films

Zanden, van der Ajj Ton; Goossens, Elj Emile

doi:10.1016/s0255-2701(03)00073-4

Cited by 9 publications

(2 citation statements)

References 7 publications

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“…Latex paint is a common finishing material for interior walls and ceiling. Van der Zanden and Goossens 41 studied water sorption by latex paint; at RH = 50%, their mathematical relationship estimates 8.6 g of sorbed water per kg of paint. Consider again the example of a room with dimensions 3 × 4 × 2.3 m, for which the walls and ceiling are covered by gypsum board finished by a 50-µm-thick latex paint layer, 44 with a nominal assumed density of 1 g/cm 3 .…”

Section: Sorbed Watermentioning

confidence: 99%

Indoor acids and bases

2020

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Numerous acids and bases influence indoor air quality. The most abundant of these species are CO2 (acidic) and NH3 (basic), both emitted by building occupants. Other prominent inorganic acids are HNO3, HONO, SO2, H2SO4, HCl, and HOCl. Prominent organic acids include formic, acetic, and lactic; nicotine is a noteworthy organic base. Sources of N‐, S‐, and Cl‐containing acids can include ventilation from outdoors, indoor combustion, consumer product use, and chemical reactions. Organic acids are commonly more abundant indoors than outdoors, with indoor sources including occupants, wood, and cooking. Beyond NH3 and nicotine, other noteworthy bases include inorganic and organic amines. Acids and bases partition indoors among the gas‐phase, airborne particles, bulk water, and surfaces; relevant thermodynamic parameters governing the partitioning are the acid‐dissociation constant (Ka), Henry's law constant (KH), and the octanol‐air partition coefficient (Koa). Condensed‐phase water strongly influences the fate of indoor acids and bases and is also a medium for chemical interactions. Indoor surfaces can be large reservoirs of acids and bases. This extensive review of the state of knowledge establishes a foundation for future inquiry to better understand how acids and bases influence the suitability of indoor environments for occupants, cultural artifacts, and sensitive equipment.

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Section: Sorbed Watermentioning

confidence: 99%

Indoor acids and bases

2020

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“…In the hygrometric methods, the equilibrium relative humidity with a sample at a given moisture content is measured. Two examples of more modern techniques to measure the concentration in a sample are the impedance spectroscopy technique and the light reflection and/or attenuation technique, such as the infrared spectroscopy (22).…”

Section: Measurement Of Sorption Isothermsmentioning

confidence: 99%

Models of Sorption Isotherms for Food: Uses and Limitations

P¹,

M²,

C³

2011

Vitae

164

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Moisture sorption isotherms describe the relationship between moisture content and water activity in food. This work presents basic concepts related to the sorption thermodynamics of water, the classification of isotherms, “uses and limitations of the models”, and measurement of sorption isotherms for food materials. The most commonly used models in food are Brunauer-Emmett-Teller and Guggenheim-Anderson-de Boer. The success of the Brunauer-Emmett-Teller model is rather qualitative, considering that almost all cases are linear only in a limited rank of water activity from 0.05 to 0.45, as its main applicability is the estimation of surface areas. And, the use of the Guggenheim-Anderson-de Boer model is generalized by its theoretical bases, mathematical simplicity, and ease to interpret; but it is not frequently used when the water activity greater than 0.93.

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