Cellulose nanocrystal-reinforced poly(5-triethoxysilyl-2-norbornene) composites
- Virginia Polytechnic Inst. and State Univ. (Virginia Tech), Blacksburg, VA (United States); Univ. of Tennessee
- Univ. of Tennessee, Knoxville, TN (United States)
- Virginia Polytechnic Inst. and State Univ. (Virginia Tech), Blacksburg, VA (United States)
Here, we demonstrate the reinforcement of a previously inaccessible norbornene-silane with a stiff, bio-based nanofiller. Poly(5-triethoxysilyl-2-norbornene) (PTESN), a glassy and thermally stable polymer, was combined with cellulose nanocrystals (CNCs) and solvent cast from toluene to form reinforced materials. Composite films showed excellent translucency and no visible aggregation, which was supported by scanning electron micrographs that showed no signs of CNC aggregation within the polymer matrix. Reinforcement was evident at the moderate loading of 5 wt% CNC, showing a statistically significant enhancement for Young's modulus and even greater reinforcement for 20 wt% CNC loading for Young's modulus (540 MPa vs. 970 MPa) and storage modulus at 25 °C (400 MPa vs. 1200 MPa). We anticipate that there is a strong interaction between the polymer and CNC filler based upon the increase of thermal degradation temperature of the CNCs increasing, for example from 278 °C to 295 °C at 10 wt% CNCs. These interactions were probed via solid-state NMR, which suggests that no covalent bonding occurs between the triethoxylsilyl substituents of the polymer and the CNCs. We therefore hypothesize that hydrogen bonding interactions between PTESN and CNCs are responsible for the increased thermal stability and reinforcement of the polymer material.
- Research Organization:
- Univ. of Tennessee, Knoxville, TN (United States)
- Sponsoring Organization:
- USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Chemical Sciences, Geosciences & Biosciences Division
- Grant/Contract Number:
- SC0018179
- OSTI ID:
- 1595332
- Alternate ID(s):
- OSTI ID: 1566264
- Journal Information:
- Polymer Chemistry, Journal Name: Polymer Chemistry Journal Issue: 2 Vol. 11; ISSN PCOHC2; ISSN 1759-9954
- Publisher:
- Royal Society of ChemistryCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Similar Records
Poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) nanocomposites with optimal mechanical properties
Leveraging peptide–cellulose interactions to tailor the hierarchy and mechanics of peptide–polymer hybrids
Journal Article
·
Thu Feb 18 23:00:00 EST 2010
· Polymer
·
OSTI ID:1006101
Leveraging peptide–cellulose interactions to tailor the hierarchy and mechanics of peptide–polymer hybrids
Journal Article
·
Tue May 30 20:00:00 EDT 2023
· Journal of Materials Chemistry. B
·
OSTI ID:1994653