Filtern
Erscheinungsjahr
Dokumenttyp
- Zeitschriftenartikel (85)
- Vortrag (67)
- Beitrag zu einem Sammelband (12)
- Beitrag zu einem Tagungsband (11)
- Posterpräsentation (4)
- Buchkapitel (1)
- Dissertation (1)
- Sonstiges (1)
Schlagworte
- Mikroplastik (32)
- Microplastics (22)
- Analytik (15)
- TED-GC-MS (14)
- Fire retardancy (12)
- Microplastic (12)
- Flame retardancy (9)
- Analysis (8)
- Pyrolysis (8)
- Flame retardance (7)
Organisationseinheit der BAM
- 6 Materialchemie (47)
- 6.6 Physik und chemische Analytik der Polymere (47)
- 1 Analytische Chemie; Referenzmaterialien (8)
- 5 Werkstofftechnik (6)
- 5.3 Polymere Verbundwerkstoffe (6)
- 1.4 Prozessanalytik (4)
- 1.7 Organische Spuren- und Lebensmittelanalytik (4)
- 4 Material und Umwelt (2)
- 4.3 Schadstofftransfer und Umwelttechnologien (2)
- 7 Bauwerkssicherheit (2)
Paper des Monats
- ja (1)
Eingeladener Vortrag
- nein (67)
A new flame retardant based on an ammonium phosphonate is studied with respect to its thermal decomposition and its mode of action in wood-plastic composites (WPCs). The measurements are carried out by means of fire tests (cone calorimeter) and pyrolysis investigations (thermogravimetry, infrared spectroscopy). The flame retardant acts mainly in the condensed phase by increasing the amount of residue formed by the wood part in the WPC. Additional flame dilution is achieved by the release of water, ammonia and carbon dioxide during the decomposition of the flame retardant.
A first pilot study on the sorption of environmental pollutants on various microplastic materials
(2017)
With the drastic increase in plastic production, the input of plastic particles into the environment has become a recognised problem.
Xenobiotics are able to sorb to polymer materials, and this process is further enhanced where they Encounter microplastics (plastic fragments <5 mm). In this work we studied the sorption of metformin, a type-2 diabetes drug, and difenoconazole, a fungicide, onto the virgin polymer materials polyamide (PA), polypropylene (PP), and polystyrene (PS). Additionally, PP was cryo-milled and PA was treated with acid to investigate the influence of an increase in surface area and chemical modification. The material properties were also studied by dynamic scanning calorimetry (DSC), gel permeation chromatography (GPC) and Fourier transform infrared spectroscopy (FTIR). Sorption experiments were performed on the basis of a full factorial design examining the effect of agitation, pH value, and salinity. Experimental results showed that difenoconazole sorbs readily to all microplastics, whereas the more polar analyte metformin did not show any affinity to the materials used. For difenoconazole the governing factor in all cases is agitation, while both pH and salinity exhibited only a slight influence. The modification of polymers leads to enhanced sorption, indicating that an increase in surface area (cryo-milled PP) or inner volume (acid-treated PA) strongly favours adsorption. Moreover, long-term experiments demonstrated that the time until equilibrium is reached depends strongly on the particle size.