Synthesis and characterization of carbon nanotube/polyhedral oligomeric silsesquioxane hybrid nanocomposites
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Wanda D. Jones
Abstract
In this study, multiwalled carbon nanotubes (CNTs) coated with functionalized polyhedral oligomeric silsesquioxanes (POSS) were studied as potential polymer fillers. A straightforward sonochemical method is used to coat CNTs with four different types of POSS® functionalized materials: (a) glycidylethyl (GE)-POSS, (b) octaIsobutyl (OI)-POSS, (c) epoxycyclohexyl (EC)-POSS, and (d) glycidylisooctyl (GI)-POSS. Surface coating of CNTs with POSS was analyzed using Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), and high-resolution transmission electron microscopy (HRTEM). The FTIR results indicated that the epoxy rings may be open and attached to the surface of CNTs in case of EC-POSS. XPS results show the decrease of carbon upon coating of POSS as compared to the pristine CNTs. The percentage of decrease in carbon atom upon coating is ~−6%, −12%, and −18% for OI-POSS, GI-POSS, and GE-POSS, respectively. TGA analyses show the ~75 wt%, 50 wt%, and 23 wt% coverage of GE-POSS, EC-POSS, and GI-POSS on CNTs, respectively. HRTEM confirms the uniform coating of the POSS on CNTs. These various types of coatings of POSS on CNTs can be used as potential polymer fillers for lightweight high-strength polymer nanocomposite.
Abstract
In this study, multiwalled carbon nanotubes (CNTs) coated with functionalized polyhedral oligomeric silsesquioxanes (POSS) were studied as potential polymer fillers. A straightforward sonochemical method is used to coat CNTs with four different types of POSS® functionalized materials: (a) glycidylethyl (GE)-POSS, (b) octaIsobutyl (OI)-POSS, (c) epoxycyclohexyl (EC)-POSS, and (d) glycidylisooctyl (GI)-POSS. Surface coating of CNTs with POSS was analyzed using Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), and high-resolution transmission electron microscopy (HRTEM). The FTIR results indicated that the epoxy rings may be open and attached to the surface of CNTs in case of EC-POSS. XPS results show the decrease of carbon upon coating of POSS as compared to the pristine CNTs. The percentage of decrease in carbon atom upon coating is ~−6%, −12%, and −18% for OI-POSS, GI-POSS, and GE-POSS, respectively. TGA analyses show the ~75 wt%, 50 wt%, and 23 wt% coverage of GE-POSS, EC-POSS, and GI-POSS on CNTs, respectively. HRTEM confirms the uniform coating of the POSS on CNTs. These various types of coatings of POSS on CNTs can be used as potential polymer fillers for lightweight high-strength polymer nanocomposite.
Chapters in this book
- Frontmatter I
- Preface V
- Contents IX
- List of contributors XI
- About the editors XIII
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Part I: State-of-the-art
- A comprehensive review on hybrid composites: processing, characterization, and applications 1
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Part II: Synthesis and characterization
- Synthesis and characterization of carbon nanotube/polyhedral oligomeric silsesquioxane hybrid nanocomposites 21
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Part III: Applications and analysis
- Viscoelastic response of hybrid polymeric dental composites in sliding contacts and applications 41
- Investigation of mechanical properties of rice straws and rice husk reinforced hybrid polymeric composite 59
- Optimizations on various lightweight composite materials under complex load using advanced computational simulation 81
- Investigations of mechanical properties of a hybrid nanocomposite for the development of lower body orthotic callipers 103
- Mechanical and wear properties of AL7075 Sic and graphite hybrid composite and optimization using utility additives method 117
- Subject index 151
Chapters in this book
- Frontmatter I
- Preface V
- Contents IX
- List of contributors XI
- About the editors XIII
-
Part I: State-of-the-art
- A comprehensive review on hybrid composites: processing, characterization, and applications 1
-
Part II: Synthesis and characterization
- Synthesis and characterization of carbon nanotube/polyhedral oligomeric silsesquioxane hybrid nanocomposites 21
-
Part III: Applications and analysis
- Viscoelastic response of hybrid polymeric dental composites in sliding contacts and applications 41
- Investigation of mechanical properties of rice straws and rice husk reinforced hybrid polymeric composite 59
- Optimizations on various lightweight composite materials under complex load using advanced computational simulation 81
- Investigations of mechanical properties of a hybrid nanocomposite for the development of lower body orthotic callipers 103
- Mechanical and wear properties of AL7075 Sic and graphite hybrid composite and optimization using utility additives method 117
- Subject index 151
