3 research outputs found
Modification of Oligomers and Reinforced Polymeric Composites by Carbon Nanotubes and Ultrasonic
An abridged version of the book chapter is presented in the archive. Full version on the publisher's site: https://link.springer.com/chapter/10.1007/978-3-030-26672-1_3Π ΠΎΠ·Π³Π»ΡΠ΄Π°ΡΡΡΡΡ ΡΠΈΡΠΎΠΊΠ΅ ΠΊΠΎΠ»ΠΎ ΠΏΠΈΡΠ°Π½Ρ ΡΠΎΠ΄ΠΎ ΡΠΎΠ·ΡΠΎΠ±Π»Π΅Π½ΠΈΡ
Π½Π°ΠΏΡΡΠΌΡΠ² ΠΌΠΎΠ΄ΠΈΡΡΠΊΠ°ΡΡΡ Π΅ΠΏΠΎΠΊΡΠΈΠ΄Π½ΠΈΡ
ΠΎΠ»ΡΠ³ΠΎΠΌΠ΅ΡΡΠ² Ρ Π°ΡΠΌΠΎΠ²Π°Π½ΠΈΡ
ΠΏΠΎΠ»ΡΠΌΠ΅ΡΠ½ΠΈΡ
ΠΊΠΎΠΌΠΏΠΎΠ·ΠΈΡΡΠ² Π½Π° ΡΡ
ΠΎΡΠ½ΠΎΠ²Ρ Π²ΡΠ³Π»Π΅ΡΠ΅Π²ΠΈΠΌΠΈ Π½Π°Π½ΠΎΡΡΡΠ±ΠΊΠ°ΠΌΠΈ Ρ ΡΠ»ΡΡΡΠ°Π·Π²ΡΠΊΠΎΠΌ. ΠΠ½Π°Π»ΡΠ·ΡΡΡΡΡΡ ΠΏΠ΅ΡΡΠΏΠ΅ΠΊΡΠΈΠ²Π½ΡΡΡΡ ΡΡΠ²ΠΎΡΠ΅Π½Π½Ρ Π³ΡΠ±ΡΠΈΠ΄Π½ΠΈΡ
ΠΏΠΎΠ»ΡΠΌΠ΅ΡΠ½ΠΈΡ
ΠΊΠΎΠΌΠΏΠΎΠ·ΠΈΡΡΠ² ΡΡΠ½ΠΊΡΡΠΎΠ½Π°Π»ΡΠ½ΠΎΠ³ΠΎ ΠΏΡΠΈΠ·Π½Π°ΡΠ΅Π½Π½Ρ.This chapter analyzes the physical (in the form of ultrasound) and chemical modification of liquid polymer media and reinforced polymeric composites. The main emphasis is made on the analysis of ultrasonic cavitation processing as the most effective one for solving one of the main technological problems in the production of nanomodified polymer composites
Modelling flow and filtration in liquid composite moulding of nanoparticle loaded thermosets
This paper presents analytical and numerical models of liquid moulding of hybrid composites. An 1-D analytical solution of Darcy's problem, accompanied by nanoparticle filtration kinetics and conservation, has been developed. A non-linear finite difference model incorporating variations in permeability, porosity and viscosity as a function of local nanoparticle loading was formulated. Comparison of the two models allowed verification of their validity, whilst a mesh sensitivity study demonstrated the convergence of the numerical scheme. The limits of validity of the analytical solution were established over a range of infiltration lengths and filtration rates for different nanoparticle loadings. The analytical model provides an accurate and efficient approximation of through thickness infusion of hybrid composites, whereas use of the numerical scheme is necessary for accurate simulation of in-plane filling processes. The models developed here can serve as the basis of process design/optimisation for the production of hybrid composites with controlled distribution of nano-reinforcement
RTM processing and electrical performance of carbon nanotube modified epoxy/ fibre composites
This investigation focuses on nanoparticle filtration in the processing of
multiscale carbon and glass fibre composites via resin transfer moulding.
Surface modified and unmodified carbon nanotubes (CNTs) were incorporated into a
commercial epoxy resin. The dispersion quality was evaluated using electrical
measurements of the liquid suspensions. The manufacturing process was adapted to
the challenges posed by the modified rheological behaviour of the CNT loaded
resin. Nanoparticle filtration was observed; with some of the unmodified systems
following so called βcake filtration' behaviour. This resulted in nonlinear flow
behaviour that deviated from the ideal response observed in RTM filling in
conventional composites. The electrical conductivity of relatively high fibre
volume fraction multiscale carbon and glass laminates increased by less than an
order of magnitude with the addition of the nanotub