Study of xylan adsorption onto poly(ethylene terephthalate) using QCM-D
Owing to superior mechanical properties, synthetic polymers like poly(ethylene terephthalate), polytetrafluorethylene, polypropylene, etc. keep an exceptional position in medical and technical fields. However, in many cases, their highly hydrophobic and inert surfaces represent an important drawback for many applications. Therefore, surface modifications are needed. The main aim of this investigation was to study the interaction of carboxymethylated xylans with poly(ethylene terephthalate) (PET) surfaces. Two different types of xylans, glucuronoxylan derived from wood, and arabinoxylan derived from oat spelt, were carboxymethylated in order to introduce hydrophilic entities. A quartz crystal microbalance with dissipation monitoring was used as a nanogram sensitive balance to detect the amount of deposited carboxymethylated xylans onto PET, as well as the behaviour of the bound xylan layers. The deposition/adsorption of xylans onto PET model films was studied in the dependence of the pH value and ionic strength, as well as of the presence of an anchoring polymer layer. Xylans deposit favourably at lower pH and higher ionic strengths, which are conditions leading to lower solubilities of xylans, manifesting that physical interactions between PET films and xylans are the driving force for the adsorption, which was reversible. When an intermediate layer of chosen functional polymer poly(ethyleneimine), a so-called anchoring agent was applied, the binding of xylans was improved significantly. The results showed that with the surface modifications and targeted introduction of derivatised xylans, it is possible to tailor surface hydrophilicities and reactivities of PET materials accurately.
KeywordsXylans Carboxymethylated xylans Poly(ethylene terephthalate) films Adsorption QCM-D Hydrophilicity
The research work was conducted within the framework of the Research Programme P2-0118 Textile Chemistry (Slovenian Research Agency) and granted by the Slovenian Technology Agency –TIA (P-MR10/03). We thank Matej Bracic for his technical support and Dr. Alenka Vesel for the XPS measurements.
- Biolin Scientific (2016) Biolin Scientific. In: Precis. Tensiometers. https://www.biolinscientific.com/. Accessed 17 May 2018
- Chibowski S, Wiśniewska M, Marczewski AW, Pikus S (2003) Application of the SAXS method and viscometry for determination of the thickness of adsorbed polymer layers at the ZrO2-polymer solution interface. J Colloid Interface Sci 267:1–8. https://doi.org/10.1016/S0021-9797(03)00698-2 CrossRefPubMedGoogle Scholar
- Chibowski S, Grządka E, Patkowski J (2009) Influence of a type of electrolyte and its ionic strength on the adsorption and the structure of adsorbed polymer layer in the system: polyacrylic acid/SiO2. Croat Chem Acta 82:623–631Google Scholar
- Doliška A (2011) Uporaba kremenove mikrotehtnice za spremljanje adsorpcije biopolimerov. Tekstilec 54:172–180Google Scholar
- Doliška A (2012) Improving the biocompatibility of PET surfaces by adsorbing mannans and mannan derivatives. Karl-Franzens University of GrazGoogle Scholar
- Doliška A, Strnad S, Stana-Kleinschek K (2012) Heparin adsorption onto model poly(ethylene terephtalate) (pet) surfaces monitored by QCM-D. Mater Tehnol 46:81–85Google Scholar
- Ebringerová A, Hromádková Z, Heinze T (2005) Hemicellulose. In: Heinze T (ed) Polysaccharides I. Springer, Berlin/Heidelberg, pp 1–67Google Scholar
- Heinze T, Petzold K, Hornig S (2007) Novel nanoparticles based on xylan. Cellul Chem Technol 41:13–18Google Scholar
- Holmberg K, Jönsson B, Kronberg B, Lindman B (2003) Surfactants and polymers in aqueous solution. John Wiley & SonsGoogle Scholar
- Mohan T, Spirk S, Kargl R et al (2012) Watching cellulose grow—kinetic investigations on cellulose thin film formation at the gas–solid interface using a quartz crystal microbalance with dissipation (QCM-D). Colloids Surf A Physicochem Eng Asp 400:67–72. https://doi.org/10.1016/J.COLSURFA.2012.02.053 CrossRefGoogle Scholar
- Van Houte F (2016) The European man-made fibres industry: meeting the challenges of a changing world. In: 55th Dornbirn Man-made fibers congress. 5th Dornbirn man-made fibers congress, Austria, 20–22 Sept 2016Google Scholar