Influence of the Organoclay Content on the Structure, Morphology, and Surface Related Properties of Novel Poly(dimethylsiloxane)-Based Polyurethane/Organoclay Nanocomposites
Authors
Pergal, Marija
Stefanović, Ivan

Poreba, Rafal
Steinhart, Milos
Jovancic, Petar
Ostojić, Sanja

Spirkova, Milena
Article (Accepted Version)

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Novel poly(dimethylsiloxane)-based polyurethane nanocomposites (TPU-NCs) were synthesized using in situ polymerization with the nanoclay Cloisite 30B. Differential scanning calorimetry, thermogravimetric analysis, and dynamic mechanical thermal analysis showed that TPU-NCs with an organoclay content of LT = 5 wt % exhibited increased thermal stability, storage modulus, and hard-segment melt temperatures but decreased degrees of crystallinity. TPU-NCs displayed increased surface hydrophilicity and enhanced surface free energy with increasing organoclay content. Small and wide-angle X-ray scattering confirmed intercalated formations of organoclays in the nanocomposites. Individual clay particles on the surfaces of TPUs with lower organoclay loadings (1 or 3 wt %) or organoclay agglomerates in TPUs with higher amounts of organoclay (>= 5 wt %) were detectable using scanning electron microscopy. The relatively smooth and homogeneous character of pure TPU and the distinctly heterogeneous a...nd rough surfaces of TPU-NCs were detected via atomic force microscopy. Among the nanomaterials prepared, TPU-NCs with 1 wt % organoclay provided the best balance between the organoclay concentration and the functional properties desired in biomedical applications.
Source:
Industrial and Engineering Chemistry Research, 2017, 56, 17, 4970-4983Publisher:
- American Chemical Society (ACS)
Funding / projects:
- Synthesis and characterization of novel functional polymers and polymeric nanocomposites (RS-172062)
- Czech Science Foundation (Grant Agency of the Czech Republic) - 13-06700S
Note:
- This is the peer-reviewed version of the following article: Industrial and Engineering Chemistry Research, 2017, 56, 17, 4970-4983 https://doi.org/10.1021/acs.iecr.6b04913
- http://cer.ihtm.bg.ac.rs/handle/123456789/2260
DOI: 10.1021/acs.iecr.6b04913
ISSN: 0888-5885
WoS: 000400802200009
Scopus: 2-s2.0-85020757779
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IHTMTY - JOUR AU - Pergal, Marija AU - Stefanović, Ivan AU - Poreba, Rafal AU - Steinhart, Milos AU - Jovancic, Petar AU - Ostojić, Sanja AU - Spirkova, Milena PY - 2017 UR - https://cer.ihtm.bg.ac.rs/handle/123456789/3003 AB - Novel poly(dimethylsiloxane)-based polyurethane nanocomposites (TPU-NCs) were synthesized using in situ polymerization with the nanoclay Cloisite 30B. Differential scanning calorimetry, thermogravimetric analysis, and dynamic mechanical thermal analysis showed that TPU-NCs with an organoclay content of LT = 5 wt % exhibited increased thermal stability, storage modulus, and hard-segment melt temperatures but decreased degrees of crystallinity. TPU-NCs displayed increased surface hydrophilicity and enhanced surface free energy with increasing organoclay content. Small and wide-angle X-ray scattering confirmed intercalated formations of organoclays in the nanocomposites. Individual clay particles on the surfaces of TPUs with lower organoclay loadings (1 or 3 wt %) or organoclay agglomerates in TPUs with higher amounts of organoclay (>= 5 wt %) were detectable using scanning electron microscopy. The relatively smooth and homogeneous character of pure TPU and the distinctly heterogeneous and rough surfaces of TPU-NCs were detected via atomic force microscopy. Among the nanomaterials prepared, TPU-NCs with 1 wt % organoclay provided the best balance between the organoclay concentration and the functional properties desired in biomedical applications. PB - American Chemical Society (ACS) T2 - Industrial and Engineering Chemistry Research T1 - Influence of the Organoclay Content on the Structure, Morphology, and Surface Related Properties of Novel Poly(dimethylsiloxane)-Based Polyurethane/Organoclay Nanocomposites VL - 56 IS - 17 SP - 4970 EP - 4983 DO - 10.1021/acs.iecr.6b04913 ER -
@article{ author = "Pergal, Marija and Stefanović, Ivan and Poreba, Rafal and Steinhart, Milos and Jovancic, Petar and Ostojić, Sanja and Spirkova, Milena", year = "2017", abstract = "Novel poly(dimethylsiloxane)-based polyurethane nanocomposites (TPU-NCs) were synthesized using in situ polymerization with the nanoclay Cloisite 30B. Differential scanning calorimetry, thermogravimetric analysis, and dynamic mechanical thermal analysis showed that TPU-NCs with an organoclay content of LT = 5 wt % exhibited increased thermal stability, storage modulus, and hard-segment melt temperatures but decreased degrees of crystallinity. TPU-NCs displayed increased surface hydrophilicity and enhanced surface free energy with increasing organoclay content. Small and wide-angle X-ray scattering confirmed intercalated formations of organoclays in the nanocomposites. Individual clay particles on the surfaces of TPUs with lower organoclay loadings (1 or 3 wt %) or organoclay agglomerates in TPUs with higher amounts of organoclay (>= 5 wt %) were detectable using scanning electron microscopy. The relatively smooth and homogeneous character of pure TPU and the distinctly heterogeneous and rough surfaces of TPU-NCs were detected via atomic force microscopy. Among the nanomaterials prepared, TPU-NCs with 1 wt % organoclay provided the best balance between the organoclay concentration and the functional properties desired in biomedical applications.", publisher = "American Chemical Society (ACS)", journal = "Industrial and Engineering Chemistry Research", title = "Influence of the Organoclay Content on the Structure, Morphology, and Surface Related Properties of Novel Poly(dimethylsiloxane)-Based Polyurethane/Organoclay Nanocomposites", volume = "56", number = "17", pages = "4970-4983", doi = "10.1021/acs.iecr.6b04913" }
Pergal, M., Stefanović, I., Poreba, R., Steinhart, M., Jovancic, P., Ostojić, S.,& Spirkova, M.. (2017). Influence of the Organoclay Content on the Structure, Morphology, and Surface Related Properties of Novel Poly(dimethylsiloxane)-Based Polyurethane/Organoclay Nanocomposites. in Industrial and Engineering Chemistry Research American Chemical Society (ACS)., 56(17), 4970-4983. https://doi.org/10.1021/acs.iecr.6b04913
Pergal M, Stefanović I, Poreba R, Steinhart M, Jovancic P, Ostojić S, Spirkova M. Influence of the Organoclay Content on the Structure, Morphology, and Surface Related Properties of Novel Poly(dimethylsiloxane)-Based Polyurethane/Organoclay Nanocomposites. in Industrial and Engineering Chemistry Research. 2017;56(17):4970-4983. doi:10.1021/acs.iecr.6b04913 .
Pergal, Marija, Stefanović, Ivan, Poreba, Rafal, Steinhart, Milos, Jovancic, Petar, Ostojić, Sanja, Spirkova, Milena, "Influence of the Organoclay Content on the Structure, Morphology, and Surface Related Properties of Novel Poly(dimethylsiloxane)-Based Polyurethane/Organoclay Nanocomposites" in Industrial and Engineering Chemistry Research, 56, no. 17 (2017):4970-4983, https://doi.org/10.1021/acs.iecr.6b04913 . .