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Performance and hazard assessment of fluorinated and non-fluorinated state-of-the-art DWR-polymers

Steffen Schellenberger ; Hanna Holmquist (Institutionen för kemi och kemiteknik, Kemisk miljövetenskap) ; Ike van der Veen ; Philip Gillgard ; Gregory Peters (Institutionen för kemi och kemiteknik, Kemisk miljövetenskap) ; Pim E.G. Leonards ; Ian T. Cousins
SETAC Nantes 2016 (2016)
[Konferensbidrag, poster]

Durable water repellent (DWR) impregnation is applied in textile finishing to impart water and, depending on impregnation chemicals, oil and stain resistance to textiles. Following the phase-out of the most effective and predominating DWR-technology based on long-chain perand polyfluoroalkyl substances (PFASs), the textile industry had to find suitable alternatives. This phase-out has resulted in a market where both fluorinated and non-fluorinated DWRs are available, dividable into three broad groups: short chain PFAS-based, silicone-based and hydrocarbonbased polymers. During our research in the SUPFES (Substitution of prioritised poly- and perfluorinated chemicals to eliminate diffuse sources) project, the alternative DWRs were assessed with regards to: (i)their structural properties and connected performance, (ii) loss and degradation processes resulting in diffuse environmental emissions, and (iii) hazard profile for selected emitted substances. We worked with DWR-chemistry and raw material producers to appropriately treat two commercially relevant types of fabrics with the DWR alternative chemistries (fluorinated and non-fluorinated). We compared the performance of the treated fabrics developed in the project by testing the following properties using industrial standardised methods: general properties, physical properties, DWR properties and tabilities of properties considering relevant stress- parameters. We demonstrated that non-fluorinated alternatives can have a competitive water repellency in comparison to short-chain PFAS substitutes, but that they lack oil repellence. We further estimated possible loss mechanisms for impurities and/or degradation products from DWR-treated fabrics and conducted a hazard assessment for relevant chemicals based on data available in the literature. Our hazard ranking suggests that hydrocarbonbased polymers are the most environmentally benign, followed by silicone- and fluorocarbon-based polymers. Future work will include risk assessment and life cycle assessments (LCA) to estimate long-term advantages and disadvantages of the different DWR-technologies.

Denna post skapades 2016-05-18. Senast ändrad 2016-05-24.
CPL Pubid: 236661