Solvent isotope effect on gelation process of methylcellulose studied by NMR and DSC

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

The gelation process of methylcellulose (MC) in light (H2O) and heavy (D2O) waters was investigated using NMR and DSC to elucidate solvent isotope effect on the process. As temperature is raised, MC chains in both solvents undergo the aggregation and subsequent gelation; however, their onset temperatures are lower in D2O than H2O. This demonstrates that D2O enhances the hydrophobic attractive force, which is the driving force for the aggregation and gelation. We propose that the excluded volume effect of the hydrophobic segments in MC chains should play a pivotal role for the enhancement, while, prior to the above investigation, chemical shift assignments of proton and carbon resonances are performed, and six resonances are newly assigned.

Original languageEnglish
Pages (from-to)4245-4255
Number of pages11
JournalPolymer Bulletin
Volume75
Issue number9
DOIs
Publication statusPublished - Sep 1 2018

Fingerprint

Methylcellulose
gelation
Gelation
Isotopes
isotope effect
Nuclear magnetic resonance
nuclear magnetic resonance
Agglomeration
proton resonance
Heavy water
heavy water
Chemical shift
chemical equilibrium
Protons
Carbon
Temperature
augmentation
carbon
temperature

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Condensed Matter Physics
  • Polymers and Plastics
  • Materials Chemistry

Cite this

Solvent isotope effect on gelation process of methylcellulose studied by NMR and DSC. / Miura, Yoshinori.

In: Polymer Bulletin, Vol. 75, No. 9, 01.09.2018, p. 4245-4255.

Research output: Contribution to journalArticle

@article{187032d5615a4677881490a979a09bd0,
title = "Solvent isotope effect on gelation process of methylcellulose studied by NMR and DSC",
abstract = "The gelation process of methylcellulose (MC) in light (H2O) and heavy (D2O) waters was investigated using NMR and DSC to elucidate solvent isotope effect on the process. As temperature is raised, MC chains in both solvents undergo the aggregation and subsequent gelation; however, their onset temperatures are lower in D2O than H2O. This demonstrates that D2O enhances the hydrophobic attractive force, which is the driving force for the aggregation and gelation. We propose that the excluded volume effect of the hydrophobic segments in MC chains should play a pivotal role for the enhancement, while, prior to the above investigation, chemical shift assignments of proton and carbon resonances are performed, and six resonances are newly assigned.",
author = "Yoshinori Miura",
year = "2018",
month = "9",
day = "1",
doi = "10.1007/s00289-017-2265-y",
language = "English",
volume = "75",
pages = "4245--4255",
journal = "Polymer Bulletin",
issn = "0170-0839",
publisher = "Springer Verlag",
number = "9",

}

TY - JOUR

T1 - Solvent isotope effect on gelation process of methylcellulose studied by NMR and DSC

AU - Miura, Yoshinori

PY - 2018/9/1

Y1 - 2018/9/1

N2 - The gelation process of methylcellulose (MC) in light (H2O) and heavy (D2O) waters was investigated using NMR and DSC to elucidate solvent isotope effect on the process. As temperature is raised, MC chains in both solvents undergo the aggregation and subsequent gelation; however, their onset temperatures are lower in D2O than H2O. This demonstrates that D2O enhances the hydrophobic attractive force, which is the driving force for the aggregation and gelation. We propose that the excluded volume effect of the hydrophobic segments in MC chains should play a pivotal role for the enhancement, while, prior to the above investigation, chemical shift assignments of proton and carbon resonances are performed, and six resonances are newly assigned.

AB - The gelation process of methylcellulose (MC) in light (H2O) and heavy (D2O) waters was investigated using NMR and DSC to elucidate solvent isotope effect on the process. As temperature is raised, MC chains in both solvents undergo the aggregation and subsequent gelation; however, their onset temperatures are lower in D2O than H2O. This demonstrates that D2O enhances the hydrophobic attractive force, which is the driving force for the aggregation and gelation. We propose that the excluded volume effect of the hydrophobic segments in MC chains should play a pivotal role for the enhancement, while, prior to the above investigation, chemical shift assignments of proton and carbon resonances are performed, and six resonances are newly assigned.

UR - http://www.scopus.com/inward/record.url?scp=85040318812&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85040318812&partnerID=8YFLogxK

U2 - 10.1007/s00289-017-2265-y

DO - 10.1007/s00289-017-2265-y

M3 - Article

AN - SCOPUS:85040318812

VL - 75

SP - 4245

EP - 4255

JO - Polymer Bulletin

JF - Polymer Bulletin

SN - 0170-0839

IS - 9

ER -