Swelling of carboxymethylated cellulose fibres

Research output: Contribution to journalArticle

35 Citations (Scopus)

Abstract

Swelling of cotton cellulose fibres having different proportions of carboxyl groups in the H-form was studied. The carboxyl groups were introduced by carboxymethylation under different reaction conditions. By studying the swelling of modified cellulose samples (water retention value of non-dried fibre) it was shown that the concentration of sodium hydroxide was the dominant factor among the investigated reaction parameters. The number of acidic groups was found to play a significant but not determinative role in the level of improvement in swelling caused by carboxymethylation. A linear correlation was observed between swelling and iodine sorption capacity. The degree of collapse of the highly accessible structure of cellulose during drying (hornification) was larger in the case of more accessible carboxymethylated fibres than for the alkali treated sample. The degree of hornification increased with growing swellability and with growing number of carboxyl groups in the investigated interval (40-120 mmol carboxyl/mol cellulose). This type of modified cellulosic fibre could be used for enhanced entrapping and release of chemicals.

Original languageEnglish
Pages (from-to)293-303
Number of pages11
JournalCellulose
Volume4
Issue number4
Publication statusPublished - 1997

Fingerprint

Cellulose
Swelling
Fibers
Sodium Hydroxide
Alkalies
Iodine
Cotton
Sorption
Drying
Sodium
Water

Keywords

  • Acid groups
  • Carboxymethylcellulose
  • Hornification
  • Swelling
  • Water retention

ASJC Scopus subject areas

  • Polymers and Plastics

Cite this

Swelling of carboxymethylated cellulose fibres. / Rácz, I.; Borsa, J.

In: Cellulose, Vol. 4, No. 4, 1997, p. 293-303.

Research output: Contribution to journalArticle

@article{ce6651b795074317b04e86cd8c37ce61,
title = "Swelling of carboxymethylated cellulose fibres",
abstract = "Swelling of cotton cellulose fibres having different proportions of carboxyl groups in the H-form was studied. The carboxyl groups were introduced by carboxymethylation under different reaction conditions. By studying the swelling of modified cellulose samples (water retention value of non-dried fibre) it was shown that the concentration of sodium hydroxide was the dominant factor among the investigated reaction parameters. The number of acidic groups was found to play a significant but not determinative role in the level of improvement in swelling caused by carboxymethylation. A linear correlation was observed between swelling and iodine sorption capacity. The degree of collapse of the highly accessible structure of cellulose during drying (hornification) was larger in the case of more accessible carboxymethylated fibres than for the alkali treated sample. The degree of hornification increased with growing swellability and with growing number of carboxyl groups in the investigated interval (40-120 mmol carboxyl/mol cellulose). This type of modified cellulosic fibre could be used for enhanced entrapping and release of chemicals.",
keywords = "Acid groups, Carboxymethylcellulose, Hornification, Swelling, Water retention",
author = "I. R{\'a}cz and J. Borsa",
year = "1997",
language = "English",
volume = "4",
pages = "293--303",
journal = "Cellulose",
issn = "0969-0239",
publisher = "Springer Netherlands",
number = "4",

}

TY - JOUR

T1 - Swelling of carboxymethylated cellulose fibres

AU - Rácz, I.

AU - Borsa, J.

PY - 1997

Y1 - 1997

N2 - Swelling of cotton cellulose fibres having different proportions of carboxyl groups in the H-form was studied. The carboxyl groups were introduced by carboxymethylation under different reaction conditions. By studying the swelling of modified cellulose samples (water retention value of non-dried fibre) it was shown that the concentration of sodium hydroxide was the dominant factor among the investigated reaction parameters. The number of acidic groups was found to play a significant but not determinative role in the level of improvement in swelling caused by carboxymethylation. A linear correlation was observed between swelling and iodine sorption capacity. The degree of collapse of the highly accessible structure of cellulose during drying (hornification) was larger in the case of more accessible carboxymethylated fibres than for the alkali treated sample. The degree of hornification increased with growing swellability and with growing number of carboxyl groups in the investigated interval (40-120 mmol carboxyl/mol cellulose). This type of modified cellulosic fibre could be used for enhanced entrapping and release of chemicals.

AB - Swelling of cotton cellulose fibres having different proportions of carboxyl groups in the H-form was studied. The carboxyl groups were introduced by carboxymethylation under different reaction conditions. By studying the swelling of modified cellulose samples (water retention value of non-dried fibre) it was shown that the concentration of sodium hydroxide was the dominant factor among the investigated reaction parameters. The number of acidic groups was found to play a significant but not determinative role in the level of improvement in swelling caused by carboxymethylation. A linear correlation was observed between swelling and iodine sorption capacity. The degree of collapse of the highly accessible structure of cellulose during drying (hornification) was larger in the case of more accessible carboxymethylated fibres than for the alkali treated sample. The degree of hornification increased with growing swellability and with growing number of carboxyl groups in the investigated interval (40-120 mmol carboxyl/mol cellulose). This type of modified cellulosic fibre could be used for enhanced entrapping and release of chemicals.

KW - Acid groups

KW - Carboxymethylcellulose

KW - Hornification

KW - Swelling

KW - Water retention

UR - http://www.scopus.com/inward/record.url?scp=0012928859&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0012928859&partnerID=8YFLogxK

M3 - Article

VL - 4

SP - 293

EP - 303

JO - Cellulose

JF - Cellulose

SN - 0969-0239

IS - 4

ER -