A nano-TiO2/regenerated cellulose biohybrid enabled simultaneous improvements in strength and toughness for solid epoxy resins

Yang, Jiayao and Wang, Hengxu and Liu, Xiaohuan and Fu, Shenyuan and Song, Pingan ORCID: https://orcid.org/0000-0003-1082-652X (2021) A nano-TiO2/regenerated cellulose biohybrid enabled simultaneous improvements in strength and toughness for solid epoxy resins. Composites Science and Technology, 212:108884. pp. 1-9. ISSN 0266-3538


Abstract

The intrinsic brittleness has significantly restricted practical applications of epoxy resins. Existing toughening strategies often lead to degraded mechanical strength. Hence, it has been attractive but a huge challenge to design high-performance sustainable additives that can simultaneously improve strength and toughness of epoxy resins. Here, we report the synthesis of a nano-TiO2/regenerate cellulose (RC) biohybrid via a facile microwave method for strengthening and toughening a soft epoxy resin system (modulus below 1 GPa). Our results show that with 10 phr nano-TiO2/RC, the resultant epoxy composite exhibits simultaneous enhancements in tensile strength and impact toughness, ca. 38% and 40% higher than corresponding values of virgin epoxy resin because of improved interfacial compatibility. Moreover, the addition of as-designed nano-TiO2/RC can enhance thermostability of epoxy resin. It has a slightly negative effect on the curing reaction but does not change the curing mechanism of epoxy resins. This study provides a facile, efficient and green method for preparing bifunctional additive for creating strong and tough epoxy composites, which are expected to find wider applications in industries.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Permanent restricted access to Published version in accordance with the copyright policy of the publisher.
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: 10 Nov 2021 03:07
Last Modified: 08 Mar 2022 21:34
Uncontrolled Keywords: cellulose; Nano-TiO2; solid epoxy resin; toughening; strengthening
Fields of Research (2008): 09 Engineering > 0912 Materials Engineering > 091202 Composite and Hybrid Materials
09 Engineering > 0912 Materials Engineering > 091209 Polymers and Plastics
Fields of Research (2020): 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
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
Identification Number or DOI: https://doi.org/10.1016/j.compscitech.2021.108884
URI: http://eprints.usq.edu.au/id/eprint/44063

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