Title

Post-gel polymerisation shrinkage profiling of polymer biomaterials using a chirped fibre Bragg grating

Publication Name

Scientific Reports

Abstract

A strain profile measurement technique using a chirped fibre Bragg grating (CFBG) sensor by implementing an integration of differences (IOD) method is reported in this paper. Using the IOD method the spatial distribution of strain along the length of the CFBG is extracted from its power reflectance spectra. As a proof of concept demonstration, the developed technique is applied to measure the polymerisation shrinkage strain profile of a photo-cured polymer dental composite which exhibits a non-uniform strain distribution attributed to the curing lamp characteristics. The result from the CFBG technique is compared with that of an FBG array embedded in the dental composite and is correlated with the degree of conversion of the material which also depends on the curing lamp intensity distribution. This technology will have significant impact and applications in a range of medical, materials and engineering areas where strain or temperature gradient profile measurement is required in smaller scales.

Open Access Status

This publication may be available as open access

Volume

11

Issue

1

Article Number

1410

Funding Number

CRCPSEVEN000013

Funding Sponsor

Australian Research Council

COinS
 

Link to publisher version (DOI)

http://dx.doi.org/10.1038/s41598-020-80838-5