Solvent and water retention in dental adhesive blends after evaporation

Cynthia K.Y. Yiu, Edna L. Pashley, Noriko Hiraishi, Nigel M. King, Cecilia Goracci, Marco Ferrari, Ricardo M. Carvalho, David Henry Pashley, Franklin Chi Meng Tay

Research output: Contribution to journalArticle

179 Citations (Scopus)

Abstract

This study examined the extent of organic solvent and water retention in comonomer blends with different hydrophilicity (Hoy's solubility parameter for hydrogen bonding, δh) after solvent evaporation, and the extent of tracer penetration in polymerised films prepared from these resins. For each comonomer blend, adhesive/solvent mixtures were prepared by addition of (1) 50 wt% acetone, (2) 50 wt% ethanol, (3) 30 wt% acetone and 20 wt% water and (4) 30 wt% ethanol and 20 wt% water. The mixtures were placed in glass wells and evaporated for 30-60 s for acetone-based resins, and 60-120 s for ethanol-based resins. The weight of the comonomer mixtures was measured before and after solvent evaporation. Resin films were prepared for transmission electron microscopy (TEM) after immersion in ammonical silver nitrate. The percentages of solvent and water retained in the comonomer mixtures, and between the acetone and ethanol groups were measured gravimetrically and were statistically compared. In comonomer-organic solvent mixtures, the percentage of solvent retained in acetone and ethanol-based mixtures increased significantly with hydrophilicity of the comonomer blends (P<0.05). In resin-organic solvent-water mixtures, significantly more solvent and water were retained in the ethanol-based mixtures (P<0.0001), when compared to acetone-based mixtures after 60 s of air-drying. TEM revealed residual water being trapped as droplets in resin films containing acetone and water. Water-filled channels were seen along the film periphery of all groups and throughout the entire resin films containing ethanol and water. The addition of water to comonomer-ethanol mixtures results in increased retention of both ethanol and water because both solvents can hydrogen bond to the monomers.

Original languageEnglish (US)
Pages (from-to)6863-6872
Number of pages10
JournalBiomaterials
Volume26
Issue number34
DOIs
StatePublished - Dec 1 2005

Fingerprint

Dental Cements
Adhesives
Evaporation
Acetone
Ethanol
Water
Resins
Organic solvents
Hydrophilicity
Transmission Electron Microscopy
Hydrophobic and Hydrophilic Interactions
Hydrogen bonds
Silver Nitrate
Transmission electron microscopy
Aquaporins
Immersion
Hydrogen Bonding
Polymer blends
Solubility
Glass

Keywords

  • Acetone
  • Ethanol
  • Hydrophilicity
  • Resin
  • Solubility parameter

ASJC Scopus subject areas

  • Bioengineering
  • Ceramics and Composites
  • Biophysics
  • Biomaterials
  • Mechanics of Materials

Cite this

Yiu, C. K. Y., Pashley, E. L., Hiraishi, N., King, N. M., Goracci, C., Ferrari, M., ... Tay, F. C. M. (2005). Solvent and water retention in dental adhesive blends after evaporation. Biomaterials, 26(34), 6863-6872. https://doi.org/10.1016/j.biomaterials.2005.05.011

Solvent and water retention in dental adhesive blends after evaporation. / Yiu, Cynthia K.Y.; Pashley, Edna L.; Hiraishi, Noriko; King, Nigel M.; Goracci, Cecilia; Ferrari, Marco; Carvalho, Ricardo M.; Pashley, David Henry; Tay, Franklin Chi Meng.

In: Biomaterials, Vol. 26, No. 34, 01.12.2005, p. 6863-6872.

Research output: Contribution to journalArticle

Yiu, CKY, Pashley, EL, Hiraishi, N, King, NM, Goracci, C, Ferrari, M, Carvalho, RM, Pashley, DH & Tay, FCM 2005, 'Solvent and water retention in dental adhesive blends after evaporation', Biomaterials, vol. 26, no. 34, pp. 6863-6872. https://doi.org/10.1016/j.biomaterials.2005.05.011
Yiu CKY, Pashley EL, Hiraishi N, King NM, Goracci C, Ferrari M et al. Solvent and water retention in dental adhesive blends after evaporation. Biomaterials. 2005 Dec 1;26(34):6863-6872. https://doi.org/10.1016/j.biomaterials.2005.05.011
Yiu, Cynthia K.Y. ; Pashley, Edna L. ; Hiraishi, Noriko ; King, Nigel M. ; Goracci, Cecilia ; Ferrari, Marco ; Carvalho, Ricardo M. ; Pashley, David Henry ; Tay, Franklin Chi Meng. / Solvent and water retention in dental adhesive blends after evaporation. In: Biomaterials. 2005 ; Vol. 26, No. 34. pp. 6863-6872.
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AB - This study examined the extent of organic solvent and water retention in comonomer blends with different hydrophilicity (Hoy's solubility parameter for hydrogen bonding, δh) after solvent evaporation, and the extent of tracer penetration in polymerised films prepared from these resins. For each comonomer blend, adhesive/solvent mixtures were prepared by addition of (1) 50 wt% acetone, (2) 50 wt% ethanol, (3) 30 wt% acetone and 20 wt% water and (4) 30 wt% ethanol and 20 wt% water. The mixtures were placed in glass wells and evaporated for 30-60 s for acetone-based resins, and 60-120 s for ethanol-based resins. The weight of the comonomer mixtures was measured before and after solvent evaporation. Resin films were prepared for transmission electron microscopy (TEM) after immersion in ammonical silver nitrate. The percentages of solvent and water retained in the comonomer mixtures, and between the acetone and ethanol groups were measured gravimetrically and were statistically compared. In comonomer-organic solvent mixtures, the percentage of solvent retained in acetone and ethanol-based mixtures increased significantly with hydrophilicity of the comonomer blends (P<0.05). In resin-organic solvent-water mixtures, significantly more solvent and water were retained in the ethanol-based mixtures (P<0.0001), when compared to acetone-based mixtures after 60 s of air-drying. TEM revealed residual water being trapped as droplets in resin films containing acetone and water. Water-filled channels were seen along the film periphery of all groups and throughout the entire resin films containing ethanol and water. The addition of water to comonomer-ethanol mixtures results in increased retention of both ethanol and water because both solvents can hydrogen bond to the monomers.

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KW - Ethanol

KW - Hydrophilicity

KW - Resin

KW - Solubility parameter

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