PMID- 35330991
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20220414
IS  - 1944-8252 (Electronic)
IS  - 1944-8244 (Linking)
VI  - 14
IP  - 14
DP  - 2022 Apr 13
TI  - High-Strength Liquid Crystal Polymer-Graphene Oxide Nanocomposites from Water.
PG  - 16592-16600
LID - 10.1021/acsami.2c00186 [doi]
AB  - We report on the morphology and mechanical properties of nanocomposite films 
      derived from aqueous, hybrid liquid crystalline mixtures of rodlike aggregates of 
      a sulfonated, all-aromatic polyamide, poly(2,2'-disulfonyl-4,4'-benzidine 
      terephthalamide) (PBDT), and graphene oxide (GO) platelets. An isothermal step at 
      200  degrees C facilitates in situ partial thermal reduction of GO to reduced GO (rGO) in 
      nanocomposite films. X-ray scattering studies reveal that PBDT-rGO nanocomposites 
      exhibit both higher in-plane alignment of PBDT (the order parameter increases 
      from 0.79 to 0.9 at 1.8 vol % rGO) and alignment along the casting direction 
      (from 0.1 to 0.6 at 1.8 vol % rGO). From dynamic mechanical thermal analysis, the 
      interaction between PBDT and rGO causes the beta-relaxation activation energy for 
      PBDT to increase with rGO concentration. Modulus mapping of nanocomposites using 
      atomic force microscopy demonstrates enhanced local stiffness, indicating 
      reinforcement. From stress-strain analysis, the average Young's modulus increases 
      from 16 to 37 GPa at 1.8 vol % rGO and the average tensile strength increases 
      from 210 to 640 MPa. Despite polymer alignment along the casting direction, an 
      average transverse tensile strength of 230 MPa is obtained.
FAU - Fox, Ryan J
AU  - Fox RJ
AUID- ORCID: 0000-0002-1472-6262
AD  - Department of Applied Physical Sciences, University of North Carolina at Chapel 
      Hill, Chapel Hill, North Carolina 27599-3050, United States.
FAU - Hegde, Maruti
AU  - Hegde M
AD  - Department of Applied Physical Sciences, University of North Carolina at Chapel 
      Hill, Chapel Hill, North Carolina 27599-3050, United States.
FAU - Cole, Daniel P
AU  - Cole DP
AD  - DEVCOM Army Research Laboratory, Aberdeen Proving Ground, Maryland 21005, United 
      States.
FAU - Moore, Robert B
AU  - Moore RB
AUID- ORCID: 0000-0001-9057-7695
AD  - Department of Chemistry, Macromolecules Innovation Institute, Virginia Tech, 
      Blacksburg, Virginia 24061, United States.
FAU - Picken, Stephen J
AU  - Picken SJ
AUID- ORCID: 0000-0002-6003-518X
AD  - Faculty of Applied Sciences, Delft University of Technology, Van der Maasweg 9, 
      Delft 2629 HZ, The Netherlands.
FAU - Dingemans, Theo J
AU  - Dingemans TJ
AUID- ORCID: 0000-0002-8559-2783
AD  - Department of Applied Physical Sciences, University of North Carolina at Chapel 
      Hill, Chapel Hill, North Carolina 27599-3050, United States.
LA  - eng
PT  - Journal Article
DEP - 20220324
PL  - United States
TA  - ACS Appl Mater Interfaces
JT  - ACS applied materials & interfaces
JID - 101504991
SB  - IM
OTO - NOTNLM
OT  - graphene oxide
OT  - hybrid liquid crystal
OT  - mechanical reinforcement
OT  - nanocomposite
OT  - reduced graphene oxide
EDAT- 2022/03/26 06:00
MHDA- 2022/03/26 06:01
CRDT- 2022/03/25 05:29
PHST- 2022/03/26 06:00 [pubmed]
PHST- 2022/03/26 06:01 [medline]
PHST- 2022/03/25 05:29 [entrez]
AID - 10.1021/acsami.2c00186 [doi]
PST - ppublish
SO  - ACS Appl Mater Interfaces. 2022 Apr 13;14(14):16592-16600. doi: 
      10.1021/acsami.2c00186. Epub 2022 Mar 24.