Dynamic colour change of multifunctional thermochromic-fluorescent pigments

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25310%2F16%3A39901311" target="_blank" >RIV/00216275:25310/16:39901311 - isvavai.cz</a>

Result on the web

<a href="http://www.scientific.net/MSF.859.162" target="_blank" >http://www.scientific.net/MSF.859.162</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.4028/www.scientific.net/MSF.859.162" target="_blank" >10.4028/www.scientific.net/MSF.859.162</a>

Result language

angličtina

Original language name

Dynamic colour change of multifunctional thermochromic-fluorescent pigments

Original language description

The aim of presented paper was to prepare and characterise multifunctional thermochromic-fluorescent pigments with potential application in anti-counterfeiting patterns in security printing. Pigments were prepared by microencapsulation of chosen thermochromic system into melamine formaldehyde resin and the resin was modified with Uranine and Acid Red 52 fluorescent dyes, respectively. The fluorescence at low and high temperature was measured by spectrofluorometer. The concentration of 2.3 x 10-5 grams of fluorescent dye per one gram of polymer is sufficient for detection of fluorescence of modified polymeric shell. The dynamic colour change of prepared pigments was analysed in terms of cumulative colour difference obtained from reflectance measurements. Resulting multifunctional pigments exhibit much lower colour contrast and wider temperature sensitive interval in comparison with the bulk thermochromic system. However, the concept of two levels of verification based on two types of colour change embodied in one pigment has been approved.

Czech name

—

Czech description

—

Type

D - Article in proceedings

CEP classification

JJ - Other materials

OECD FORD branch

—

Project

<a href="/en/project/LD14098" target="_blank" >LD14098: Printed Electronics and Smart Packaging</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2016

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection

Materials Science Forum

ISBN

—

ISSN

0255-5476

e-ISSN

—

Number of pages

7

Pages from-to

162-168

Publisher name

Trans Tech Publications

Place of publication

Zürich - Uetikon

Event location

Suzhou

Event date

Apr 17, 2016

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

—