JEC COMPOSITES MAGAZINE - Issue #52 - October 2009 - 38

FEATURE The JEC/SAMPE Environment Award winner presents his study The PhD student Antoine Le Duigou, from the French University of South Brittany, will present his study at the JEC Asia Show in Singapore. Antoine won not only the recognition of the composite community with the JEC/SAMPE Environment Award, but also a ticket to Singapore to present his work. Following the abstract published on JCM n°50, here is a more detailed description of his works on interfacial bonding of flax fibre/poly(L-lactide). Blades ANTOINE LE DUIGOU, PHD STUDENT, LIMATB FRENCH UNIVERSITY OF SOUTH BRITTANY, FRANCE Droplet Fibre Dg iocomposites are made of natural fibre embedded in biopolymers, both of which are from renewable resources. They are a valuable alternative to glass/polyester composites. This work is based on flax fibres as a reinforcement [1] and poly(L-lactide) as a matrix [2]. A life cycle analysis (LCA) of flax/PLLA biocomposites was performed with the SIMAPROTM software program, quantifying environmental impacts from raw material extraction through to the end-of-life stage. The results showed that flax/PLLA biocomposites have a lower environmental impact than glass/polyester composites. The recyclability of flax/PLLA biocomposites was also investigated [3]. The results are encouraging since the modulus of biocomposites remains almost unchanged after the recycling process. Thus, end-of-life flax/PLLA biocomposites can either be biodegraded in compost or recycled. Various manufacturing routes were studied for flax/PLLA biocomposites: film stacking (hot compression of PLLA/flax stacks) and injection moulding. Film-stacked samples are less prone to degradation and, even unoptimized, they display promising tensile properties (stiffness) compared with glass/polyester composites. However, their tensile strength needs to be improved to reach the same level as glass/polyester composites. Based on these conclusions, it was decided to study flax/PLLA adhesion mechanisms [4, 5]. Micromechanical tests (fragmentation, pull-out, microbond, microindentation) were developed to evaluate the adhesion between the fibre surface and the matrix. These tests are described and analyzed elsewhere [6]. One of the best-known tests is the microbond method, which consists in shearing a microdroplet of polymer off a single fibre (Figure 1) [7, 8]. Le Fig. 1: Schematic diagram of the microbond test The first step consisted in obtaining a correct PLLA droplet on a single flax fibre (Figure 2). Each sample was observed under microscope before the test in order to eliminate the samples with inappropriate droplet symmetry and fibre defects. Droplet height and length were measured, as was the fibre diameter. The force and crosshead displacement were measured during the test. Figure 3 shows a typical curve. μm Fig. 2: Example of correct PLLA microdroplet on a single flax fibre Linear behaviour can be observed until the maximum force (Fmax) is reached. The previously stored energy is then released through fast interfacial cracking with a nearly constant friction force. Furthermore, micromechanical models based on shear-lag analysis methods such as ultimate shear stress [10] and critical jec composites magazine / No52 October 2009
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JEC COMPOSITES MAGAZINE - Issue #52 - October 2009

Table of Contents for the Digital Edition of JEC COMPOSITES MAGAZINE - Issue #52 - October 2009

Cover
Editorial
Contents
NEWS WORLDWIDE - Companies
 - Agenda of events
 - Equipment: Control
BUSINESS
 - Market survey
 - Trends
 - Niche market
FEATURE
 - JEC Show Asia
 - Biocomposites
 - Automation
USERS' PLATFORM
 - Composites in the world
 - Successful partners
 - Application
KNOW-HOW
 - Laser placement
 - Process
 - LFI
JEC COMPOSITES MAGAZINE - Issue #52 - October 2009 - Cover
JEC COMPOSITES MAGAZINE - Issue #52 - October 2009 - 2
JEC COMPOSITES MAGAZINE - Issue #52 - October 2009 - Editorial
JEC COMPOSITES MAGAZINE - Issue #52 - October 2009 - 4
JEC COMPOSITES MAGAZINE - Issue #52 - October 2009 - 5
JEC COMPOSITES MAGAZINE - Issue #52 - October 2009 - Contents
JEC COMPOSITES MAGAZINE - Issue #52 - October 2009 - 7
JEC COMPOSITES MAGAZINE - Issue #52 - October 2009 - NEWS WORLDWIDE - Companies
JEC COMPOSITES MAGAZINE - Issue #52 - October 2009 - 9
JEC COMPOSITES MAGAZINE - Issue #52 - October 2009 -  - Agenda of events
JEC COMPOSITES MAGAZINE - Issue #52 - October 2009 - 11
JEC COMPOSITES MAGAZINE - Issue #52 - October 2009 -  - Equipment: Control
JEC COMPOSITES MAGAZINE - Issue #52 - October 2009 - 13
JEC COMPOSITES MAGAZINE - Issue #52 - October 2009 - 14
JEC COMPOSITES MAGAZINE - Issue #52 - October 2009 - BUSINESS
JEC COMPOSITES MAGAZINE - Issue #52 - October 2009 -  - Market survey
JEC COMPOSITES MAGAZINE - Issue #52 - October 2009 -  - Trends
JEC COMPOSITES MAGAZINE - Issue #52 - October 2009 - 18
JEC COMPOSITES MAGAZINE - Issue #52 - October 2009 - 19
JEC COMPOSITES MAGAZINE - Issue #52 - October 2009 -  - Niche market
JEC COMPOSITES MAGAZINE - Issue #52 - October 2009 - Pub1
JEC COMPOSITES MAGAZINE - Issue #52 - October 2009 - Pub2
JEC COMPOSITES MAGAZINE - Issue #52 - October 2009 - FEATURE
JEC COMPOSITES MAGAZINE - Issue #52 - October 2009 -  - JEC Show Asia
JEC COMPOSITES MAGAZINE - Issue #52 - October 2009 - 23
JEC COMPOSITES MAGAZINE - Issue #52 - October 2009 - 24
JEC COMPOSITES MAGAZINE - Issue #52 - October 2009 - 25
JEC COMPOSITES MAGAZINE - Issue #52 - October 2009 - 26
JEC COMPOSITES MAGAZINE - Issue #52 - October 2009 - 27
JEC COMPOSITES MAGAZINE - Issue #52 - October 2009 - 28
JEC COMPOSITES MAGAZINE - Issue #52 - October 2009 - 29
JEC COMPOSITES MAGAZINE - Issue #52 - October 2009 - 30
JEC COMPOSITES MAGAZINE - Issue #52 - October 2009 - 31
JEC COMPOSITES MAGAZINE - Issue #52 - October 2009 - 32
JEC COMPOSITES MAGAZINE - Issue #52 - October 2009 - 33
JEC COMPOSITES MAGAZINE - Issue #52 - October 2009 - 34
JEC COMPOSITES MAGAZINE - Issue #52 - October 2009 - 35
JEC COMPOSITES MAGAZINE - Issue #52 - October 2009 - 36
JEC COMPOSITES MAGAZINE - Issue #52 - October 2009 - 37
JEC COMPOSITES MAGAZINE - Issue #52 - October 2009 -  - Biocomposites
JEC COMPOSITES MAGAZINE - Issue #52 - October 2009 - 39
JEC COMPOSITES MAGAZINE - Issue #52 - October 2009 -  - Automation
JEC COMPOSITES MAGAZINE - Issue #52 - October 2009 - 41
JEC COMPOSITES MAGAZINE - Issue #52 - October 2009 - 42
JEC COMPOSITES MAGAZINE - Issue #52 - October 2009 - 43
JEC COMPOSITES MAGAZINE - Issue #52 - October 2009 - 44
JEC COMPOSITES MAGAZINE - Issue #52 - October 2009 - 45
JEC COMPOSITES MAGAZINE - Issue #52 - October 2009 - 46
JEC COMPOSITES MAGAZINE - Issue #52 - October 2009 - 47
JEC COMPOSITES MAGAZINE - Issue #52 - October 2009 - 48
JEC COMPOSITES MAGAZINE - Issue #52 - October 2009 - USERS' PLATFORM
JEC COMPOSITES MAGAZINE - Issue #52 - October 2009 -  - Composites in the world
JEC COMPOSITES MAGAZINE - Issue #52 - October 2009 - 51
JEC COMPOSITES MAGAZINE - Issue #52 - October 2009 -  - Successful partners
JEC COMPOSITES MAGAZINE - Issue #52 - October 2009 - 53
JEC COMPOSITES MAGAZINE - Issue #52 - October 2009 -  - Application
JEC COMPOSITES MAGAZINE - Issue #52 - October 2009 - 55
JEC COMPOSITES MAGAZINE - Issue #52 - October 2009 - 56
JEC COMPOSITES MAGAZINE - Issue #52 - October 2009 - KNOW-HOW
JEC COMPOSITES MAGAZINE - Issue #52 - October 2009 -  - Laser placement
JEC COMPOSITES MAGAZINE - Issue #52 - October 2009 - 59
JEC COMPOSITES MAGAZINE - Issue #52 - October 2009 - 60
JEC COMPOSITES MAGAZINE - Issue #52 - October 2009 -  - Process
JEC COMPOSITES MAGAZINE - Issue #52 - October 2009 - 62
JEC COMPOSITES MAGAZINE - Issue #52 - October 2009 - 63
JEC COMPOSITES MAGAZINE - Issue #52 - October 2009 -  - LFI
JEC COMPOSITES MAGAZINE - Issue #52 - October 2009 - 65
JEC COMPOSITES MAGAZINE - Issue #52 - October 2009 - 66
JEC COMPOSITES MAGAZINE - Issue #52 - October 2009 - 67
JEC COMPOSITES MAGAZINE - Issue #52 - October 2009 - 68
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