Publication detail

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

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

Original Title

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

Type

conference paper

Language

English

Original Abstract

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.

Keywords

Self-assembly, fibers, nanosilica, dioxane

Authors

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

Released

1. 10. 2020

Publisher

Tanger

ISBN

978-80-87294-95-6

Book

Proceedings 11th International Conference on Nanomaterials - Research & Application

Pages from

673

Pages to

678

Pages count

6

URL

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

Full text in the Digital Library

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"
}