Influence of UV irradiation on mechanical performance and shape memory response of 4D printed SMPU/MWCNT nanocomposites

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F70883521%3A28610%2F25%3A63597338" target="_blank" >RIV/70883521:28610/25:63597338 - isvavai.cz</a>

Výsledek na webu

<a href="https://link.springer.com/content/pdf/10.1007/s10965-025-04585-9.pdf?utm_source=clarivate&getft_integrator=clarivate" target="_blank" >https://link.springer.com/content/pdf/10.1007/s10965-025-04585-9.pdf?utm_source=clarivate&getft_integrator=clarivate</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s10965-025-04585-9" target="_blank" >10.1007/s10965-025-04585-9</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Influence of UV irradiation on mechanical performance and shape memory response of 4D printed SMPU/MWCNT nanocomposites

Popis výsledku v původním jazyce

Shape memory polymers (SMPs) are advanced materials capable of recovering predetermined shapes in response to external triggers. Incorporating nanoparticles like multiwalled carbon nanotubes (MWCNTs) into SMPs holds the potential for improving their overall performance. This study developed SMP/MWCNT nanocomposites at various concentrations from 0.25 to 1.0 wt.% and specimens were fabricated via 4D printing. Despite this, the impact of ultraviolet (UV) irradiation on these SMP/MWCNT nanocomposites remains understudied. The current research study explores how UV exposure influences the mechanical, thermal, and shape recovery characteristics of SMP nanocomposite. The specimens were subjected to UV-B irradiation for varying time durations of 250, 500, 750, and 1000 hours (h). The mechanical, thermal, structural, and shape recovery characteristics of pre- and post-irradiation specimens were studied using DSC (Differential Scanning Calorimetry), tensile, flexural, FTIR (Fourier transform infrared spectroscopy), and XRD (X-ray diffraction) tests. The results revealed significant improvements in mechanical, thermal, and shape recovery properties at an irradiation duration of 250 hours, with increases of 41% in tensile strength, 33% in flexural strength, and a 10% increase in glass transition temperature (Tg). Notably, these enhancements were accompanied by a 20-30% acceleration in shape recovery. Significantly, the study showed that all analysed characteristics indicated that 250 hours was the optimal irradiation time. These discoveries offer important insights into the potential use of SMP/MWCNT nanocomposites for outdoor and various other applications.

Název v anglickém jazyce

Influence of UV irradiation on mechanical performance and shape memory response of 4D printed SMPU/MWCNT nanocomposites

Popis výsledku anglicky

Shape memory polymers (SMPs) are advanced materials capable of recovering predetermined shapes in response to external triggers. Incorporating nanoparticles like multiwalled carbon nanotubes (MWCNTs) into SMPs holds the potential for improving their overall performance. This study developed SMP/MWCNT nanocomposites at various concentrations from 0.25 to 1.0 wt.% and specimens were fabricated via 4D printing. Despite this, the impact of ultraviolet (UV) irradiation on these SMP/MWCNT nanocomposites remains understudied. The current research study explores how UV exposure influences the mechanical, thermal, and shape recovery characteristics of SMP nanocomposite. The specimens were subjected to UV-B irradiation for varying time durations of 250, 500, 750, and 1000 hours (h). The mechanical, thermal, structural, and shape recovery characteristics of pre- and post-irradiation specimens were studied using DSC (Differential Scanning Calorimetry), tensile, flexural, FTIR (Fourier transform infrared spectroscopy), and XRD (X-ray diffraction) tests. The results revealed significant improvements in mechanical, thermal, and shape recovery properties at an irradiation duration of 250 hours, with increases of 41% in tensile strength, 33% in flexural strength, and a 10% increase in glass transition temperature (Tg). Notably, these enhancements were accompanied by a 20-30% acceleration in shape recovery. Significantly, the study showed that all analysed characteristics indicated that 250 hours was the optimal irradiation time. These discoveries offer important insights into the potential use of SMP/MWCNT nanocomposites for outdoor and various other applications.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10404 - Polymer science

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

Journal of Polymer Research

ISSN

1022-9760

e-ISSN

—

Svazek periodika

32

Číslo periodika v rámci svazku

10

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

19

Strana od-do

nestránkováno

Kód UT WoS článku

001573179800001

EID výsledku v databázi Scopus

2-s2.0-105016787730