Bioinspired, Strong, and Tough Nanostructured Poly(vinyl alcohol)/Inositol Composites: How Hydrogen-Bond Cross-Linking Works?

Xu, Xiaodong and Li, Lujuan and Seraji, Seyed Mohsen and Liu, Lei and Jiang, Zhen and Xu, Zhiguang and Li, Xin and Zhao, Sheng and Wang, Hao and Song, Pingan ORCID: https://orcid.org/0000-0003-1082-652X (2020) Bioinspired, Strong, and Tough Nanostructured Poly(vinyl alcohol)/Inositol Composites: How Hydrogen-Bond Cross-Linking Works? Macromolecules, 54 (20). pp. 9510-9521. ISSN 0024-9297


Abstract

Spider silk-inspired hydrogen-bond (H-bond) cross-linking has recently been shown to enable polymers, e.g., poly(vinyl alcohol) (PVA), to achieve high strength in combination with large ductility and great toughness by adding small H-bond cross-linkers. Unfortunately, the correlation of H-bond cross-linking to the microstructure and mechanical performances of the resultant polymers remains unclear. Herein, we prepare strong and tough nanostructured PVA composites with inositol (IN) molecules as cross-linkers. The addition of 1.0 wt % of IN increases the yield strength (σy) of PVA up to 148 MPa (by ∼31%), in combination with appreciable increases in the break strain (by 250%) and toughness (by 3.6-fold) because of dynamic physical cross-linking and crystalline grain refinement. We show that there exists a close but simple correlation between the H-bond cross-linking density (ne) and σy, the chain movement (e.g., glass transition temperature (Tg), relaxation activation energy (Ea)) and the crystalline grain size (L), namely, σy ∝ ne, Tg, Ea, and 1/L. This work casts light on the governing effect of H-bonding cross-linking on the microstructure and mechanical properties of PVA and unveils its correlation to mechanical properties, chain dynamics, and crystallization for the first time. These exciting findings open up many new opportunities for creating strong, tough, and ductile polymeric materials.


Statistics for USQ ePrint 44073
Statistics for this ePrint Item
Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Faculty/School / Institute/Centre: Current - Institute for Advanced Engineering and Space Sciences - Centre for Future Materials (1 Jan 2017 -)
Faculty/School / Institute/Centre: Current - Institute for Advanced Engineering and Space Sciences - Centre for Future Materials (1 Jan 2017 -)
Date Deposited: 29 Nov 2021 04:52
Last Modified: 02 Dec 2021 00:22
Uncontrolled Keywords: Cross linking; Crosslinker; High-strength; Mechanical performance; Microstructure performance; Nano-structured; Poly (vinyl alcohol) (PVA); Poly(vinyl alcohol); Poly(vinyl alcohol) (PVA); Spider silks
Fields of Research (2008): 09 Engineering > 0912 Materials Engineering > 091202 Composite and Hybrid Materials
09 Engineering > 0912 Materials Engineering > 091209 Polymers and Plastics
09 Engineering > 0912 Materials Engineering > 091205 Functional Materials
Fields of Research (2020): 34 CHEMICAL SCIENCES > 3403 Macromolecular and materials chemistry > 340302 Macromolecular materials
40 ENGINEERING > 4016 Materials engineering > 401609 Polymers and plastics
40 ENGINEERING > 4016 Materials engineering > 401602 Composite and hybrid materials
Socio-Economic Objectives (2008): E Expanding Knowledge > 97 Expanding Knowledge > 970109 Expanding Knowledge in Engineering
E Expanding Knowledge > 97 Expanding Knowledge > 970103 Expanding Knowledge in the Chemical Sciences
Socio-Economic Objectives (2020): 28 EXPANDING KNOWLEDGE > 2801 Expanding knowledge > 280105 Expanding knowledge in the chemical sciences
28 EXPANDING KNOWLEDGE > 2801 Expanding knowledge > 280110 Expanding knowledge in engineering
Funding Details:
Identification Number or DOI: https://doi.org/10.1021/acs.macromol.1c01725
URI: http://eprints.usq.edu.au/id/eprint/44073

Actions (login required)

View Item Archive Repository Staff Only