Detail publikace

In-situ self-assembly of silica nanoparticles into microfibers with potential to reinforce polymers

ZÁRYBNICKÁ, K. ONDREÁŠ, F. LEPCIO, P. CHEN, C. JANČÁŘ, J.

Originální název

In-situ self-assembly of silica nanoparticles into microfibers with potential to reinforce polymers

Typ

článek ve sborníku ve WoS nebo Scopus

Jazyk

angličtina

Originální abstrakt

Silica nanosphere with a diameter of 10–15 nm were organized into fibers with a lenght of 15 mm and an aspect ratio of 100 by self-assembly in 1,4-dioxane. Dioxane causes a positive zeta potential on the silica surface thus silica in dioxane may behave as an acceptor (base catalyzer) causing decomposition of dioxane to acetaldehyde and its consequent polymerization into oligomer or polymer (polyoxyethylene) chains that bond the particles together. This process was proved using a thermogravimetric analysis which showed that the amount of polymerized dioxane is in the rang 2–3.5 wt. %. Composition of the polymerized dioxane was elucidated employing FTIR. The formation of fibrillar structures was driven kinetically during solidification. The size of the fibers was controlled by the drying rate. Fast-drying results in longer and thinner fibers. Nanosilica fibers can also be formed in a polymer matrix (e.g., polycarbonate) via the solvent-casting method. Formation of fibers in-situ in a soft rubber polymer matrix in one-step processing can provide a polymer reinforcement at two hierarchical levels – at the nanoscale by immobilizing polymer chains due to the presence of nanoparticles and the microscale by strain transfer to the fibers. Elastic modulus of the fibers was determined by wrinkling technique by compression on the elastic surface and by thermal treatment in the polycarbonate matrix. Both techniques showed modulus 43–46 MPa.

Klíčová slova

Self-assembly, fibers, nanosilica, dioxane

Autoři

ZÁRYBNICKÁ, K.; ONDREÁŠ, F.; LEPCIO, P.; CHEN, C.; JANČÁŘ, J.

Vydáno

1. 10. 2020

Nakladatel

Tanger

ISBN

978-80-87294-95-6

Kniha

Proceedings 11th International Conference on Nanomaterials - Research & Application

Strany od

673

Strany do

678

Strany počet

6

URL

https://www.confer.cz/nanocon/2019/101-in-situ-self-assembly-of-silica-nanoparticles-into-microfibers-with-potential-to-reinforce-polymers

Plný text v Digitální knihovně

http://hdl.handle.net/11012/196679

BibTex

@inproceedings{BUT160696,
  author="Klára {Zárybnická} and František {Ondreáš} and Petr {Lepcio} and Chao {Chen} and Josef {Jančář}",
  title="In-situ self-assembly of silica nanoparticles into microfibers with potential to reinforce polymers",
  booktitle="Proceedings 11th International Conference on Nanomaterials - Research & Application",
  year="2020",
  pages="673--678",
  publisher="Tanger",
  doi="10.37904/nanocon.2019.8489",
  isbn="978-80-87294-95-6",
  url="https://www.confer.cz/nanocon/2019/101-in-situ-self-assembly-of-silica-nanoparticles-into-microfibers-with-potential-to-reinforce-polymers"
}