Preparation of polyetherimide nanoparticles on carbon fiber surface via evaporation induced surface modification method and its effect on tensile strength and interfacial shear strength

2018 ◽  
Vol 454 ◽  
pp. 54-60 ◽  
Author(s):  
Peng Zhu ◽  
Fangtao Ruan ◽  
Limin Bao
Keyword(s):  
Tensile Strength ◽  
Shear Strength ◽  
Surface Modification ◽  
Carbon Fiber ◽  
Interfacial Shear Strength ◽  
Fiber Surface ◽  
Interfacial Shear ◽  
Modification Method ◽  
Carbon Fiber Surface

scholarly journals Lignin as a Functional Green Coating on Carbon Fiber Surface to Improve Interfacial Adhesion in Carbon Fiber Reinforced Polymers

Materials ◽  
2019 ◽  
Vol 12 (1) ◽  
pp. 159 ◽  
Author(s):  
László Szabó ◽  
Sari Imanishi ◽  
Fujie Tetsuo ◽  
Daisuke Hirose ◽  
Hisai Ueda ◽  
...  
Keyword(s):  
Shear Strength ◽  
Carbon Fiber ◽  
Interfacial Adhesion ◽  
Interfacial Shear Strength ◽  
Fiber Surface ◽  
Covalent Bond ◽  
Interfacial Shear ◽  
Fiber Reinforced ◽  
X Ray ◽  
Carbon Fiber Surface

While intensive efforts are made to prepare carbon fiber reinforced plastics from renewable sources, less emphasis is directed towards elaborating green approaches for carbon fiber surface modification to improve the interfacial adhesion in these composites. In this study, we covalently attach lignin, a renewable feedstock, to a graphitic surface for the first time. The covalent bond is established via aromatic anchoring groups with amine functions taking part in a nucleophilic displacement reaction with a tosylated lignin derivative. The successful grafting procedures were confirmed by cyclic voltammetry, X-ray photoelectron spectroscopy, and field emission scanning electron microscopy coupled with energy dispersive X-ray spectroscopy. Both fragmentation and microdroplet tests were conducted to evaluate the interfacial shear strength of lignin coated carbon fiber samples embedded in a green cellulose propionate matrix and in a commercially used epoxy resin. The microdroplet test showed ~27% and ~65% increases in interfacial shear strength for the epoxy and cellulose propionate matrix, respectively. For the epoxy matrix covalent bond, it is expected to form with lignin, while for the cellulosic matrix hydrogen bond formation might take place; furthermore, plastisizing effects are also considered. Our study opens the gates for utilizing lignin coating to improve the shear tolerance of innovative composites.

SYNERGISTIC EFFECTS OF PLASMA POLYMERIZATION AND COVALENT SURFACE MODIFICATION OF CARBON FIBERS

2021 ◽  
Author(s):  
DANIEL J. EYCKENS ◽  
LACHLAN SOULSBY ◽  
FILIP STOJCEVSKI ◽  
ATHULYA WICKRAMASINGHA ◽  
LUKE C. HENDERSON
Keyword(s):  
Tensile Strength ◽  
Shear Strength ◽  
Surface Modification ◽  
Carbon Fibers ◽  
Plasma Polymerization ◽  
Interfacial Shear Strength ◽  
Synergistic Effects ◽  
Interfacial Shear ◽  
Carbon Fibres ◽  
Electrochemical Pretreatment

This work demonstrates the efficacy in performing an electrochemical pretreatment on carbon fibres to improve the effect of plasma polymerization of acrylic acid on these surfaces. Modified samples demonstrated improve physical properties including tensile strength and Young’s modulus, as well as an increase in composite performance as measured by the interfacial shear strength. The electrochemical pretreatment was shown to enhance the advantages observed when coating fibres using plasma polymerization.

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