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Ultrafine bamboo-char as a new reinforcement in poly(lactic acid)/bamboo particle biocomposites: The effects on mechanical, thermal, and morphological properties

Published online by Cambridge University Press:  24 August 2018

Shaoping Qian Open the ORCID record for Shaoping Qian [Opens in a new window] ,
Yingying Tao ,
Yiping Ruan ,
Cesar A. Fontanillo Lopez  and
Linqiong Xu
Shaoping Qian*
Affiliation:
School of Materials Science and Chemical Engineering, Ningbo University, Ningbo 315211, China; and State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, China
Yingying Tao
Affiliation:
School of Materials Science and Chemical Engineering, Ningbo University, Ningbo 315211, China
Yiping Ruan*
Affiliation:
School of Materials Science and Chemical Engineering, Ningbo University, Ningbo 315211, China
Cesar A. Fontanillo Lopez
Affiliation:
School of Materials Science and Chemical Engineering, Ningbo University, Ningbo 315211, China
Linqiong Xu
Affiliation:
School of Materials Science and Chemical Engineering, Ningbo University, Ningbo 315211, China
*
a)Address all correspondence to these authors. e-mail: qianshaoping@nbu.edu.cn
b)e-mail: ruanyiping@nbu.edu.cn
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Abstract

In this study, varying contents of ultrafine bamboo-char (UFBC) were introduced into PLA/bamboo particle (BP) biocomposites as new reinforcements to improve the mechanical, thermal, and morphological properties of the biocomposites. The new strategy was aiming to realize the synergistic effects of reinforcement and toughening of poly(lactic acid) (PLA) composites through a simple method without surface modification and other additives. The maximum tensile strength, modulus, and elongation at break of 45.20 MPa, 540.50 MPa, and 7.53% were reached at 5.0 wt% UFBC content, which were slightly lower than those of pure PLA. The maximum modulus of elasticity of the ternary biocomposites was 5316.1 MPa at 5.0 wt% UFBC content, which was approximately 2 times higher than the pure PLA. Impact strength reached a maximum value of 38.56 J/m when the UFBC content was 5 wt%, and improved by 376% compared with pure PLA of 7.88 J/m. Meanwhile, compared with the PLA/BP binary composite of 20.50 J/m, it improved 88%. A concrete-like microstructure system was achieved (i.e., cement, sand, and rebar corresponding to PLA, UFBC, and BP, respectively).

Keywords

compositepolymertoughness

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Type
Article
Information
Journal of Materials Research , Volume 33 , Issue 22 , 28 November 2018 , pp. 3870 - 3879
Copyright
Copyright © Materials Research Society 2018 

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