Synthesis and characterization of superabsorbent hydrogels based on hydroxyethylcellulose and acrylic acid

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Abstract

Hydroxyethylcellulose (HEC)/acrylic acid (AAc) copolymer gels with superabsorbent properties were synthesized from aqueous solutions by radiation-initiated crosslinking. The effect of the acrylic acid content on gel properties was determined at different synthesis conditions. The partial replacement of the cellulose derivative with acrylic acid improved the gelation, leading to higher gel fraction and lower water uptake even in very low concentrations (1–5%). In the presence of acrylic acid lower dose and solute concentration was required for the gel synthesis. The molecular properties of the hydroxyethylcellulose also had a major effect on the gelation: higher molecular mass resulted in better gel properties. The acrylic acid also affected the electrolyte sensitivity of the hydrogels: while pure HEC gels were unaffected by the ionic strength of the solvent, the water uptake of HEC/AAc gels decreased with the salt concentration. The sensitivity also depended on the acrylic acid ratio.

Original languageEnglish
Pages (from-to)300-308
Number of pages9
JournalCarbohydrate Polymers
Volume166
DOIs
Publication statusPublished - Jun 15 2017

Fingerprint

Hydrogels
Acrylics
Gels
Acids
Gelation
Cellulose derivatives
Water
Molecular mass
hydroxyethylcellulose
acrylic acid
Ionic strength
Crosslinking
Electrolytes
Copolymers
Salts
Radiation

Keywords

  • Acrylic acid
  • Crosslinking
  • Hydrogel
  • Hydroxyethylcellulose
  • Irradiation
  • Superabsorbent

ASJC Scopus subject areas

  • Polymers and Plastics
  • Organic Chemistry
  • Materials Chemistry

Cite this

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title = "Synthesis and characterization of superabsorbent hydrogels based on hydroxyethylcellulose and acrylic acid",
abstract = "Hydroxyethylcellulose (HEC)/acrylic acid (AAc) copolymer gels with superabsorbent properties were synthesized from aqueous solutions by radiation-initiated crosslinking. The effect of the acrylic acid content on gel properties was determined at different synthesis conditions. The partial replacement of the cellulose derivative with acrylic acid improved the gelation, leading to higher gel fraction and lower water uptake even in very low concentrations (1–5{\%}). In the presence of acrylic acid lower dose and solute concentration was required for the gel synthesis. The molecular properties of the hydroxyethylcellulose also had a major effect on the gelation: higher molecular mass resulted in better gel properties. The acrylic acid also affected the electrolyte sensitivity of the hydrogels: while pure HEC gels were unaffected by the ionic strength of the solvent, the water uptake of HEC/AAc gels decreased with the salt concentration. The sensitivity also depended on the acrylic acid ratio.",
keywords = "Acrylic acid, Crosslinking, Hydrogel, Hydroxyethylcellulose, Irradiation, Superabsorbent",
author = "Tam{\'a}s Fekete and J. Borsa and E. Tak{\'a}cs and L. Wojn{\'a}rovits",
year = "2017",
month = "6",
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doi = "10.1016/j.carbpol.2017.02.108",
language = "English",
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journal = "Carbohydrate Polymers",
issn = "0144-8617",
publisher = "Elsevier Limited",

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TY - JOUR

T1 - Synthesis and characterization of superabsorbent hydrogels based on hydroxyethylcellulose and acrylic acid

AU - Fekete, Tamás

AU - Borsa, J.

AU - Takács, E.

AU - Wojnárovits, L.

PY - 2017/6/15

Y1 - 2017/6/15

N2 - Hydroxyethylcellulose (HEC)/acrylic acid (AAc) copolymer gels with superabsorbent properties were synthesized from aqueous solutions by radiation-initiated crosslinking. The effect of the acrylic acid content on gel properties was determined at different synthesis conditions. The partial replacement of the cellulose derivative with acrylic acid improved the gelation, leading to higher gel fraction and lower water uptake even in very low concentrations (1–5%). In the presence of acrylic acid lower dose and solute concentration was required for the gel synthesis. The molecular properties of the hydroxyethylcellulose also had a major effect on the gelation: higher molecular mass resulted in better gel properties. The acrylic acid also affected the electrolyte sensitivity of the hydrogels: while pure HEC gels were unaffected by the ionic strength of the solvent, the water uptake of HEC/AAc gels decreased with the salt concentration. The sensitivity also depended on the acrylic acid ratio.

AB - Hydroxyethylcellulose (HEC)/acrylic acid (AAc) copolymer gels with superabsorbent properties were synthesized from aqueous solutions by radiation-initiated crosslinking. The effect of the acrylic acid content on gel properties was determined at different synthesis conditions. The partial replacement of the cellulose derivative with acrylic acid improved the gelation, leading to higher gel fraction and lower water uptake even in very low concentrations (1–5%). In the presence of acrylic acid lower dose and solute concentration was required for the gel synthesis. The molecular properties of the hydroxyethylcellulose also had a major effect on the gelation: higher molecular mass resulted in better gel properties. The acrylic acid also affected the electrolyte sensitivity of the hydrogels: while pure HEC gels were unaffected by the ionic strength of the solvent, the water uptake of HEC/AAc gels decreased with the salt concentration. The sensitivity also depended on the acrylic acid ratio.

KW - Acrylic acid

KW - Crosslinking

KW - Hydrogel

KW - Hydroxyethylcellulose

KW - Irradiation

KW - Superabsorbent

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U2 - 10.1016/j.carbpol.2017.02.108

DO - 10.1016/j.carbpol.2017.02.108

M3 - Article

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VL - 166

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EP - 308

JO - Carbohydrate Polymers

JF - Carbohydrate Polymers

SN - 0144-8617

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