Homeotropically Aligned Monodomain-like Smectic-A Structure in Liquid Crystalline Epoxy Films: Analysis of the Local Ordering Structure by Microbeam Small-Angle X-ray Scattering.
Journal
ACS omega
ISSN: 2470-1343
Titre abrégé: ACS Omega
Pays: United States
ID NLM: 101691658
Informations de publication
Date de publication:
25 Aug 2020
25 Aug 2020
Historique:
received:
08
04
2020
accepted:
30
07
2020
entrez:
3
9
2020
pubmed:
3
9
2020
medline:
3
9
2020
Statut:
epublish
Résumé
For the development of functional thin films with high thermal conductivity, the local ordering structure of a cured liquid crystalline epoxy resin (LCER) droplet was investigated by using synchrotron radiation microbeam small-angle X-ray scattering. The cured LCER in the vicinity of a substrate with low surface free energy was revealed to form a polydomain smectic-A (SmA) structure in which the normal direction of the layers was random in each domain, although the alignment was planar near the air interface. On the other hand, the cured LCER on a substrate with high surface free energy formed a homeotropically aligned SmA structure in the region within 21 μm from the surface of the substrate. Therefore, a 20 μm thick LCER film was fabricated and found to form a homeotropically aligned monodomain-like SmA structure throughout the whole film with a high thermal conductivity (0.81-5.8 W m
Identifiants
pubmed: 32875213
doi: 10.1021/acsomega.0c01603
pmc: PMC7450511
doi:
Types de publication
Journal Article
Langues
eng
Pagination
20792-20799Informations de copyright
Copyright © 2020 American Chemical Society.
Déclaration de conflit d'intérêts
The authors declare no competing financial interest.
Références
ACS Omega. 2018 Mar 27;3(3):3562-3570
pubmed: 31458608
ACS Appl Mater Interfaces. 2019 Oct 9;11(40):37112-37120
pubmed: 31532992
Macromolecules. 1998 Jul 28;31(15):4730-8
pubmed: 9680406
Nat Nanotechnol. 2010 Apr;5(4):251-5
pubmed: 20208547
ACS Nano. 2018 Jul 24;12(7):6378-6388
pubmed: 29741364
ACS Appl Mater Interfaces. 2016 Nov 9;8(44):30492-30501
pubmed: 27762538
Nat Commun. 2019 Apr 16;10(1):1771
pubmed: 30992436
ACS Appl Mater Interfaces. 2017 Apr 19;9(15):13544-13553
pubmed: 28362080
ACS Appl Mater Interfaces. 2018 Oct 17;10(41):35557-35562
pubmed: 30088761
ACS Appl Mater Interfaces. 2009 Feb;1(2):225-7
pubmed: 20353204