Paper wet performance and ester crosslinking of wood pulp cellulose by poly(carboxylic acid)s

Yang, Charles Q.; Xu, Yufeng

doi:10.1002/(sici)1097-4628(19980124)67:4<649::aid-app8>3.0.co;2-u

Cited by 42 publications

(23 citation statements)

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“…It is well known that paper treated with polycarboxylic acids has improved wet strength but it also makes the paper more brittle (Yang and Xu 1998). It can be seen in the images of the cross-section of the foam materials that the foam P-CA is much denser than the other three foams (Fig.…”

Section: Structural Analysismentioning

confidence: 95%

“…Polycarboxylic acids, especially butanetetracarboxylic acid (BTCA), can be used in polysaccharide based materials to increase the stability in water, it have e.g. been used as crosslinking agents in cotton textiles to reduce wrinkles (El-Tahlawy et al 2005;Yang and Xu 1998). BTCA has also been used to improve the wet strength of paper (Gu and Yang 1998).…”

Section: Introductionmentioning

confidence: 99%

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Water-stable cellulose fiber foam with antimicrobial properties for bio based low-density materials

Ottenhall

Seppänen

2018

Cellulose

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New bio-based packaging materials are highly interesting for replacing conventional fossil based products for a more sustainable society. Waterstable cellulose fiber foams have been produced in a simple one-batch foam-forming process with drying under ambient conditions. The cellulose fiber foams have a low density (33-66 kg/m 3 ) and can inhibit microbial growth; two highly valuable features for insulating packaging materials, especially in combination with stability in water. Cationic chitosan and/or polyvinylamine have been added during the foamforming process to give the foams water-stability and antimicrobial properties. The structural and mechanical properties of the cellulose fiber foams have been studied and the antimicrobial properties have been evaluated with respect to both Escherichia coli, a common model bacteria and Aspergillus brasiliensis, a sporulating mold. The cellulose foams containing chitosan had both good water-stability and good antibacterial and antifungal properties, while the foams containing PVAm did disintegrate in water and did not inhibit fungal growth when nutrients were added to the foam, showing that it is possible to produce a bio-based foam material with the desired characters. This can be an interesting low-density packaging material for protection from both mechanical and microbial damage without using any toxic compounds.

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Section: Structural Analysismentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Water-stable cellulose fiber foam with antimicrobial properties for bio based low-density materials

Ottenhall

Seppänen

2018

Cellulose

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“…Vail 1972;Frick and Harper 1982;Welch 1992) to fluid retention and dimension stability of paper Yang and Xu 1998;Caulifield 1994), gels (Esposito et al 1996;Sannino et al 2004), and absorbents (Heinze et al 1990; Guo and Ruckenstein 2002).…”

Section: Introductionmentioning

confidence: 99%

“…Most of them rely on action of di-or polyfunctional agents capable of reacting with cellulose hydroxyls upon formation of covalent bridges, usually composed of acetal (Frick and Harper 1982;Smith 1972;Welch 1983), ether (Guo and Ruckenstein 2002;Tasker and Badyal 1994), ester (Welch 1988;Xu et al 1998;Yang and Xu 1998;Caulifield 1994), sulfone (Esposito et al 1996), disulfide (Sakamoto et al 1970), urethane (Verburg and Snowden 1967;Morak and Ward 1970) or urea linkages (Vail 1972;Stevens and Smith 1970). Properties of the crosslinked cellulose materials are dependent on the nature and distribution of the crosslinks, but are also affected by the supramolecular and morphological state of cellulose during the reaction.…”

Section: Introductionmentioning

confidence: 99%

Self-crosslinking of 2-hydroxypropyl-N-methylmorpholinium chloride cellulose fibres

Hasani

Westman

2011

Cellulose

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Crosslinking of cellulose fibres was obtained by inducing a substitution reaction in a cationic cellulose ether (NMM-cellulose) prepared by action of N-oxiranylmethyl-N-methylmorpholinium chloride. During the reaction the N-methylmorpholine moiety of the cellulosic ether acts as a leaving group facilitating a covalent bond formation between the ether substituent and a hydroxyl or other nucleophilic group present in the cellulose chain. In order to provide additional evidence of the suggested crosslinking route and investigate its possibilities, different reaction conditions have been investigated and assessed in terms of the obtained fibre properties. The crosslinked fibres were characterized by means of elemental analysis and structure accessibility studies, including accessibility to water, anions and nitrogen gas. According to these investigations heating at 105°C induces a significant crosslinking. Pretreatment with acetone restricts it mainly to formation of intra-fibre crosslinks, whereas heating from water suppresses the reactivity but results nevertheless in highly crosslinked structure with both intra-and inter-fibre crosslinks involved.

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“…There has been an interest in using citric acid and other multifunction carboxylic acid compounds to improve mechanical properties of paper and textile products, without using formaldehyde (Trask-Morrell, Kottes-Andrews et al 1991;Yang and Xu 1998). The methods that have been studied usually employ a compound with three or more acid groups that are reacted thermochemically to esterify cellulose hydroxyls.…”

Section: Introductionmentioning

confidence: 99%

Effect of Citric Acid Modification of Aspen Wood on Sorption of Copper Ion

McSweeny

Rowell

Min

2006

Journal of Natural Fibers

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ABSTRACT. Milled aspen wood was thermochemically modified with citric acid for the purpose of improving the copper (Cu 2+ ) ion sorption capacity of the wood when tested in 24-hour equilibrium batch tests. The wood-citric acid adducts provided additional carboxyl groups to those in the native wood and substantially increased Cu 2+ ion uptake of the modified wood compared with that of the unmodified wood. Sorption capacity (q e ) measured with an unbuffered standard solution increased to a maximum of 7.9 mg Cu 2+ ion/g of wood (treated) from 1.3 mg Cu 2+ ion/ g wood (untreated). When measured with a buffered standard solution, the q e increased to a maximum of 13.8 mg Cu 2+ ion/g of wood (treated) from 4.1 mg Cu 2+ ion/g wood (untreated). The treatment necessary for maximum q e was 2 hours at 130°C. Modification treatments included three time periods (2, 4, 6 hours) and three temperature regimes (110, 120, 130°C). To further evaluate the efficacy of modification treatments, weight change after treatment was monitored as an indirect measure of bound citric acid. It was found that increases to the original mass of greater than about 30% were associated with no further increase or a decline in q e . The contribution of citric acid ester linkages to increasing mass at longer reaction times was monitored with ATR/FTIR.

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Paper wet performance and ester crosslinking of wood pulp cellulose by poly(carboxylic acid)s

Cited by 42 publications

References 0 publications

Water-stable cellulose fiber foam with antimicrobial properties for bio based low-density materials

Water-stable cellulose fiber foam with antimicrobial properties for bio based low-density materials

Self-crosslinking of 2-hydroxypropyl-N-methylmorpholinium chloride cellulose fibres

Effect of Citric Acid Modification of Aspen Wood on Sorption of Copper Ion

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