JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - 46

nano-composites

A new approach for enhancing joint properties by simultaneously integrating micro- and nanosized fillers into an epoxy-silicon-organic glue formulation has been proposed. It was shown that the thermoresistance of the glue joint is improved more than threefold.

By

New thermoresistant nano-filled glue for composites
shortterm and long-term durability, an epoxy glue matrix was selected to formulate a high-thermal-resistance nanocomposition. Measured at a temperature of 20ºС, the durability of joints based on epoxy glue cured with maleic anhydride following 5 years of storage was 16% for glue stored in warehouse conditions and 27 % for glue stored in the open air. The silicon-resin glue joint’s loss of durability under the influence of climatic factors within 5 years does not exceed 10%.

Experiment
1 2 3

46

(1) PROF. SCD. Е.F. VENGER, HEAD OF SENSOR TECHNOLOGIES AND MATERIALS DIVISION, (2) DR. М.М. LOKSHYN, SENIOR SCIENTIFIC RESEARCHER (3) SCD. MASLOV V.P., HEAD OF THE LABORATORY V.E. LASHKARJOV INSTITUTE OF SEMICONDUCTOR PHYSICS OF NAS OF UKRAINE

A three-component epoxy-silicon-organic glue was selected for the glue formulation used in the experiments. The formulation included an epoxy silicon resin, an amine (hardener) curing agent and a TiO2 filling micropowder. The average size of the filling microparticles reached 30-40 μm. A base glue formulation was supplemented with a nanopowder composed of 3% Y2O3 (ittrium oxide) doped by ZrO (zirconium dioxide). The average size of ZrO nanoparticles was 10-15 nm, and their concentration in the glue formulation varied from 5 to 50 volume %. The durability of glue joints in Zerodur glass ceramic parts with almost zero thermal expansion was studied. The joined parts were tested after heat treatment in a resistanceheating muffle furnace at 250ºС for 2 hours. When a standard epoxy-silicon-organic glue formulation containing only a micropowder filler was used without a nanopowder filler, the joint durability did not exceed 10 MPa. We managed to improve this parameter by increasing the volume content of nanoparticles from 5% to 20%. After the heat treatment, when the volume of nanoparticles reached 20%, the joint remained resistant to a 35 МПа rupture stress. But when the 20% limit was exceeded, the glue formulation became extremely viscous, so it was difficult to apply an even glue layer on the surfaces and to obtain the thinnest possible glue seams.

jec composites magazine / No62 January - February 2011

T

he potential for enhancing composite properties by adding various fillers containing nanoparticles is being intensively examined. It is known that replacing microparticle fillers by nanoparticle fillers in a composite formulation results in improved physical properties [1, 2]. Fillers are introduced into the glue formulation to cure shrinkage, decrease internal stresses caused by shrinkage, improve thermal stability, enhance joint toughness and minimize the amount of glue used [2]. When carbon nanoparticles are added to the glue formulation, the initial durability and elasticity of a glutinous seam increase, and adhesion is improved [3].

The authors provided a new approach to upgrade the properties of a glue formulation. Proceeding from the assumption that particles of a different size should increase the toughness of the glue seam structure, while the presence of microparticles might raise the resistance of a glue joint to a greater degree than with nanoparticles alone, they proposed to integrate micro- and nanosized fillers simultaneously into the formulation and thus improve its properties through selection of the respective filler concentrations. This work attempted to study the thermoresistance of epoxy glue joints when microparticle and nanoparticle fillers are simultaneously integrated. Because epoxy glue formulations demonstrate the highest

Discussion of experimental results
The thermoresistance of the new glue formulation was enhanced through the joint influence of several factors.



JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011

Table of Contents for the Digital Edition of JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011

Cover
Edito
Points of view : solutions for every aircrafts
Contents
Agenda of Events
COMPANY & BUSINESS
In Brief
Carbon prepreg - Guangwei Composites, from a finished product to a semi-finished product
Incubation - Composites Technology Park: nurturing green composites
MRO - Mincham Aviation, a specialist with the ambition to match
APPLICATIONS
Automative - From Imagination to reality
Offshore - New carbon fibre compositecomponent for deep-sea use
Leisure - Tenchnology ready for gaming
MARKET
Trends - The natural gas vehicle market
Human capital - R&D manager : inside innovation
Market - An historical overview of the Para-aramid fibres for composites
FEATURE AUTOMATION
Filament winding - Automated filament-winding process for pole production
Robot - Multiple-use robots for composites part manufacturing
WPC - Compact, flexible extruder for new-comers to wood-plastic composites
Robotic - Robotic unit for the automated production of composite components
Injection - Thermoforming and injection moulding in a single mould
Testing - Robotics and non-destructive testing
RESEARCH & DEVELOPMENT
RTM - Highly integrated structure manufactured in on-shot with pre-preg UD tape
CNT - Multiscale hybrid carbon reinforcement for polymeric-matrix composites
Nano-composites - New thermoresistant nano-filled glue for composites
TECHNOLOGY & INNOVATIONS
Reinforcement - Fibre composites, those magical materials
Telecom - New polyster prepreg for composites radomeand antenna applications
Automotive - A new ultra-lightweight sandwich structure for the cars of tomorrow
Innovations
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - Cover
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - 2
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - Edito
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - Points of view : solutions for every aircrafts
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - 5
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - Contents
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - 7
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - Agenda of Events
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - In Brief
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - Carbon prepreg - Guangwei Composites, from a finished product to a semi-finished product
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - 11
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - 12
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - Incubation - Composites Technology Park: nurturing green composites
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - MRO - Mincham Aviation, a specialist with the ambition to match
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - Automative - From Imagination to reality
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - 16
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - Offshore - New carbon fibre compositecomponent for deep-sea use
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - Leisure - Tenchnology ready for gaming
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - Trends - The natural gas vehicle market
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - 20
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - 21
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - 22
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - Human capital - R&D manager : inside innovation
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - Market - An historical overview of the Para-aramid fibres for composites
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - 25
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - Pub
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - Filament winding - Automated filament-winding process for pole production
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - 27
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - Robot - Multiple-use robots for composites part manufacturing
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - 29
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - 30
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - 31
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - WPC - Compact, flexible extruder for new-comers to wood-plastic composites
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - Robotic - Robotic unit for the automated production of composite components
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - 34
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - Injection - Thermoforming and injection moulding in a single mould
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - Testing - Robotics and non-destructive testing
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - 37
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - 38
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - 39
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - RTM - Highly integrated structure manufactured in on-shot with pre-preg UD tape
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - 41
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - 42
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - CNT - Multiscale hybrid carbon reinforcement for polymeric-matrix composites
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - 44
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - 45
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - Nano-composites - New thermoresistant nano-filled glue for composites
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - 47
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - Reinforcement - Fibre composites, those magical materials
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - 49
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - Telecom - New polyster prepreg for composites radomeand antenna applications
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - 51
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - 52
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - 53
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - Automotive - A new ultra-lightweight sandwich structure for the cars of tomorrow
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - 55
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - Innovations
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - 57
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - 58
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - 59
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - 60
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