Title: Surface modification of bamboo fiber with sodium hydroxide and graphene oxide in epoxy composites

Abstract

Bamboo fibers (BFs) have high mechanical properties and are candidate reinforcement for epoxy matrix composites. However, to improve performance, good fiber-matrix interaction is required. In this work, unidirectional long BF reinforced epoxy composites at fiber volume content of 22%, 40%, and 50% were made by compression molding. The 40 v% untreated BF reinforced composites exhibited 107% and 439% increase for flexural strength and modulus, respectively, compared to neat epoxy. Sodium hydroxide (NaOH) treatment was used to modify the surface of the BFs, and then the NaOH modified BFs were coated with graphene oxide (GO). The 40 v% NaOH modified BF composites showed an improvement from 259.9 to 327.5 MPa for flexural strength and from 16.7 to 21.5 GPa for flexural modulus, compared to 40 v% untreated BF composites. Slight improvement in properties up to 334.6 MPa for flexural strength and up to 23.8 GPa for flexural modulus was achieved for composites made of 40 v% NaOH/GO modified BF. Surface modification of BF after the NaOH and NaOH/GO treatment was confirmed by X-ray photoelectron spectroscopy and by scanning electron microscopy, which showed differences on the fiber surface morphology and on the composite fracture surface. This BF surface modification approach with GOmore » has potential to impart other properties beyond mechanical to produce multifunctional composite and lead to the use of sustainable plant fibers as alternatives to synthetic fibers.« less

Authors:

Reale Batista, Mariana Desireé  ^[1];

• Search DOE PAGES for author "Reale Batista, Mariana Desireé"
• Search DOE PAGES for ORCID "0000-0003-4801-5378"

Drzal, Lawrence T. ^[2]

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+ Show Author Affiliations

1. Michigan State Univ., East Lansing, MI (United States); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
2. Michigan State Univ., East Lansing, MI (United States)

Publication Date:

Sat Nov 28 00:00:00 EST 2020

Research Org.:

Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

Sponsoring Org.:

USDOE National Nuclear Security Administration (NNSA)

OSTI Identifier:

1729737

Report Number(s):

LLNL-JRNL-812533
Journal ID: ISSN 0272-8397; 1017244

Grant/Contract Number:  

AC52-07NA27344

Resource Type:

Accepted Manuscript

Journal Name:

Polymer Composites

Additional Journal Information:

Journal Volume: na; Journal Issue: na; Journal ID: ISSN 0272-8397

Publisher:

Wiley

Country of Publication:

United States

Language:

English

Subject:

36 MATERIALS SCIENCE; Composites; Fibers; Mechanical properties; Adhesion