PMID- 32544333
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20210122
LR  - 20210122
IS  - 1520-5207 (Electronic)
IS  - 1520-5207 (Linking)
VI  - 124
IP  - 28
DP  - 2020 Jul 16
TI  - Influence of Hydrogen Bond Donor Identity and Intentional Water Addition on the 
      Properties of Gelatin-Supported Deep Eutectic Solvent Gels.
PG  - 5986-5992
LID - 10.1021/acs.jpcb.0c03361 [doi]
AB  - Deep eutectic solvent (DES) gel electrolytes have recently emerged as promising 
      alternatives to ionic liquid- or water-based gels for "ionic skin" sensor 
      applications. Researchers have also been exploring the effects that varying 
      amounts of water may have on the local hydrogen bonding environment within a few 
      model DES systems. In this study, the physical properties and ionic 
      conductivities of biopolymer (gelatin)-supported gels featuring two established 
      DESs and three DES/water mixture formulations are investigated and compared. The 
      DES/water mixtures are formed by combining choline chloride with one of three 
      organic hydrogen bond donors (HBDs), ethylene glycol, glycerol, or 
      1,2-propanediol, in a 1:2 molar ratio, together with a controlled amount of 
      water, 25 mol % (approximately 5-6 wt % water). For the same fixed gelatin 
      content (20 wt %), DES/water mixture gel Young's modulus values are found to be 
      tunable based on the organic HBD identity, increasing 6-fold from 7 
      (1,2-propanediol) to 42 (glycerol) kPa. Furthermore, large differences are 
      observed in the resulting gel properties when water has been intentionally added 
      to well-studied DESs. Coformulation with water is found to increase ethylene 
      glycol-based DES gel toughness, measured via tensile testing, from 23 to 68 
      kJ/m(3) while simultaneously boosting gel room temperature ionic conductivity 
      from 3.3 to 5.2 mS/cm. These results highlight the multiple roles that controlled 
      amounts of water in DES can play within gelatin-supported DES/mixture gel 
      electrolytes, such as influencing gelatin self-assembly and reducing local 
      viscosity to promote facile ion transport.
FAU - Owyeung, Rachel E
AU  - Owyeung RE
AD  - Department of Chemical and Biological Engineering, Tufts University, 4 Colby 
      Street, Medford, Massachusetts 02155, United States.
AD  - Nano Lab, Advanced Technology Laboratory, Tufts University, 200 Boston, Suite 
      2600, Medford, Massachusetts 02155, United States.
FAU - Sonkusale, Sameer R
AU  - Sonkusale SR
AUID- ORCID: 0000-0003-3579-910X
AD  - Nano Lab, Advanced Technology Laboratory, Tufts University, 200 Boston, Suite 
      2600, Medford, Massachusetts 02155, United States.
AD  - Department of Electrical and Computer Engineering, Tufts University, Halligan 
      Hall, 161 College Ave, Medford, Massachusetts 02155, United States.
FAU - Panzer, Matthew J
AU  - Panzer MJ
AUID- ORCID: 0000-0002-1741-8548
AD  - Department of Chemical and Biological Engineering, Tufts University, 4 Colby 
      Street, Medford, Massachusetts 02155, United States.
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
PT  - Research Support, U.S. Gov't, Non-P.H.S.
DEP - 20200630
PL  - United States
TA  - J Phys Chem B
JT  - The journal of physical chemistry. B
JID - 101157530
SB  - IM
EDAT- 2020/06/17 06:00
MHDA- 2020/06/17 06:01
CRDT- 2020/06/17 06:00
PHST- 2020/06/17 06:00 [pubmed]
PHST- 2020/06/17 06:01 [medline]
PHST- 2020/06/17 06:00 [entrez]
AID - 10.1021/acs.jpcb.0c03361 [doi]
PST - ppublish
SO  - J Phys Chem B. 2020 Jul 16;124(28):5986-5992. doi: 10.1021/acs.jpcb.0c03361. Epub 
      2020 Jun 30.