Full metadata record
| DC Field | Value | Language |
|---|---|---|
| dc.contributor | Department of Civil and Structural Engineering | en_US |
| dc.creator | Man, Changle | - |
| dc.identifier.uri | https://theses.lib.polyu.edu.hk/handle/200/5356 | - |
| dc.language | English | en_US |
| dc.publisher | Hong Kong Polytechnic University | - |
| dc.rights | All rights reserved | en_US |
| dc.title | Investigation of total volatile organic compounds emissions from hair products | en_US |
| dcterms.abstract | Consumer goods often demonstrate emissions of volatile chemical compounds during usage, and these can become a problem particularly under unfavourable indoor climate conditions. These emissions mostly involve volatile organic compounds (VOCs) or semi-volatile organic compounds (SVOCs), the differentiation being based on the boiling points or chromatographic properties. The original causes for the occurrence of these emissions are solvents, residual monomers, plasticizers, flame retardants, process auxiliaries and preservatives (biocides), which are added to the previously mentioned products in order to achieve specific properties. Furthermore, there are also emissions which do not occur until during the utilization phase. These include, for example, chemical reaction and decomposition products. Indoor air measurements are often carried out on air pollutants substances. However, the determination of the VOC and SVOC noxious emissions situation is only the first stage in respect of achieving and effective reduction in emissions. Consequently the question must be raised regarding the specific emission sources and their contribution to the total pollution as a function of indoor concentration and over defined timescales therefore requires the use of climate-controlled emission testing systems, e.g., environmental test chambers, the size of which can vary in different volumes. In the present research, an environmental chamber was used to characterize the emission of total organic compounds (TVOCs) from hairspray products. The chamber was controlled under a specific condition, i.e., temperature, relative humidity and air-exchange rates. Also, the change of TVOCs concentrations was tested and the time-dependence property of TVOCs was analyzed. A Gas Chromatography/Mass Selective detector system was employed to measure the quantity of a specific VOc. Furthermore, in order to evaluate the emission characteristics of TVOCs from these hairspray products, a double-exponential model was utilized to simulate the initial emission rates (E1O and E20) and emission decay constants (k1 and k2) in two emission phases. These emission parameters could be used in estimation of TVOCs concentrations in indoor environment. Model evaluation was also done to analyze the model accuracy of model implications. | en_US |
| dcterms.extent | viii, 60 leaves : ill. ; 30 cm. | en_US |
| dcterms.isPartOf | PolyU Electronic Theses | en_US |
| dcterms.issued | 2009 | en_US |
| dcterms.educationalLevel | All Master | en_US |
| dcterms.educationalLevel | M.Sc. | en_US |
| dcterms.LCSH | Hong Kong Polytechnic University -- Dissertations | en_US |
| dcterms.LCSH | Volatile organic compounds -- Analysis | en_US |
| dcterms.LCSH | Volatile organic compounds -- China -- Hong Kong | en_US |
| dcterms.LCSH | Cosmetics -- Environmental aspects. | en_US |
| dcterms.LCSH | Cosmetics -- Health aspects. | en_US |
| dcterms.LCSH | Indoor air quality -- China -- Hong Kong | en_US |
| dcterms.accessRights | restricted access | en_US |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| b23297529.pdf | For All Users (off-campus access for PolyU Staff & Students only) | 3.91 MB | Adobe PDF | View/Open |
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