Synthesis, characterization, and applied properties of carboxymethyl cellulose and polyacrylamide graft copolymer

Yang, Fang; Li, Gang; He, Yangang; Ren, Fengxia; Wang, Guixiang

doi:10.1016/j.carbpol.2009.04.004

Cited by 147 publications

(40 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…It is obvious that introduction of MS exhibited great influence on the thermal behaviors of the superabsorbents. The weight loss about 6.4 wt% below 251ºC for CMC-g-PNaA (corresponding to an endothermic step at 248ºC) and about 4.9 wt% below 254.7ºC for CMC-g-PNaA/ MS (corresponding to an endothermic step at 253ºC) can be ascribed to the removal of water absorbed, the dehydration of saccharide rings in the chain of CMC [36]. The successive weight loss about 20.4 wt% (251~432ºC) for CMC-g-PNaA and about 17.3 wt% (255~436ºC) for CMC-gPNaA/MS can be attributed to the breaking of C-O-C bonds in CMC chains (corresponding to the endothermic peaks at 399ºC for CMC-g-PNaA and 401ºC for CMC-g-PNaA/MS) and the elimination of water molecule derived from the two neighboring carboxylic groups of the grafted PNaA chains due to the formation of anhydride (corresponding to the endothermic peak at 424ºC for CMC-g-PNaA and 425ºC for CMC-g-PNaA/MS) [37].…”

Section: Results and Discussion 31 Ftir Spectra Analysismentioning

confidence: 99%

A pH-, salt- and solvent-responsive carboxymethylcellulose-g-poly(sodium acrylate)/medical stone superabsorbent composite with enhanced swelling and responsive properties

Wang¹,

Xu²,

Wang³

2011

Express Polym. Lett.

View full text Add to dashboard Cite

Free-radical graft copolymerization among sodium carboxymethylcellulose (CMC), partially neutralized acrylic acid (NaA), medical stone (MS) and crosslinker N,N'-methylene-bis-acrylamide (MBA) was performed to prepare new carboxymethylcellulose-g-poly(sodium acrylate)/medical stone (CMC-g-PNaA/MS) superabsorbent composites. Fourier transform infrared (FTIR) spectra, thermogravimetry- differential scanning calorimetry (TG-DSC) and field emission scanning electromicrsocopic (FESEM) analysis confirmed that NaA had been grafted onto CMC backbone and MS participated in polymerization, and the thermal stability and surface morphologies were improved by the addition of MS. Energy dispersive spectrometer (EDS) and elemental map (EM) analyses revealed the better distribution of MS in the CMC-g-PNaA matrix. The incorporation of 20 wt% MS clearly enhanced the water absorption by 100% (from 317 to 634 g/g). The developed composites showed enhanced swelling rate and On-Off switching swelling characteristics in various pH solutions, saline solutions and hydrophilic organic solvents, which represented interesting and reversible pH-, saline- and hydrophilic organic solvent-responsive characteristics. In addition, the composite exhibited intriguing time-dependent kinetic swelling properties in various heavy metal solutions

show abstract

Section: Results and Discussion 31 Ftir Spectra Analysismentioning

confidence: 99%

A pH-, salt- and solvent-responsive carboxymethylcellulose-g-poly(sodium acrylate)/medical stone superabsorbent composite with enhanced swelling and responsive properties

Wang¹,

Xu²,

Wang³

2011

Express Polym. Lett.

View full text Add to dashboard Cite

show abstract

“…Considerable research has been devoted to the development of copolymers in which CMC is reacted with acrylic monomers and various crosslinking agents to form SAPs (Kuwabara and Kubota 1996;Pourjavadi and Mahdavinia 2005;Pourjavadi and Ghasemzadeh 2006;Abd El-Mohdy 2007;Ibrahim et al 2007;Pourjavadi et al 2007aPourjavadi et al -b, 2008Pourjavadi et al , 2009Pourjavadi et al , 2010Suo et al 2007;Ali et al 2008;Chen et al 2008;Yang et al 2009;El-Din et al 2010;Feng et al 2010a;Lin et al 2010;Bao et al 2011;Eldin et al 2011;Huang et al 2011;Liu et al 2011;Shu et al 2011;Varaprasad et al 2011;Wang et al 2011c). Water absorbency values generally in the range of 40 to 1400 g/g have been reported in such studies, with the highest value reported by Pourjavadi et al (2008).…”

Section: Copolymers Of Cmc By Reaction With Monomersmentioning

confidence: 99%

Section: Effects Of Salinitymentioning

confidence: 99%

“…A number of authors have reported progress in development of somewhat "salt-tolerant" hydrogels (Kulicke and Nottelmann 1989;Yang et al 2009;Wu et al 2012). Yang et al (2009) attributed the observed salt-tolerance to graft polymerization between CMC and polyacrylamide. Rezai and Warner (1997) reported that even though salt greatly decreased the absorbency of acrylonitrile-grafted wood pulp fibers, such fibers still absorbed three times as much water as their ungrafted counterparts.…”

Section: Effects Of Salinitymentioning

confidence: 99%

See 1 more Smart Citation

Enhanced Absorbent Products Incorporating Cellulose and Its Derivatives: A Review

Hubbe¹,

Ayoub²,

Daystar³

et al. 2013

BioResources

View full text Add to dashboard Cite

Cellulose and some cellulose derivatives can play vital roles in the enhancement of the performance of absorbent products. Cellulose itself, in the form of cellulosic fibers or nano-fibers, can provide structure, bulk, water-holding capacity, and channeling of fluids over a wide dimensional range. Likewise, cellulose derivatives such as carboxymethylcellulose (CMC) have been widely studied as components in superabsorbent polymer (SAP) formulations. The present review focuses on strategies and mechanisms in which inclusion of cellulose -in its various formscan enhance either the capacity or the rate of aqueous fluid absorption in various potential applications.

show abstract

“…Carboxymethylation is followed by an etherification using chloroacetic acid or its sodium salt. The aim is to convert hydroxyl groups in carboxymethyl groups [1,2]. CMC has many desirable applications such as coating, formation of emulsions and suspensions, and water retention.…”

Section: Introductionmentioning

confidence: 99%

Properties of modified carboxymethyl cellulose prepared by lyophilisation

Borůvková¹,

Wiener²

2013

Autex Research Journal

View full text Add to dashboard Cite

This study deals with the change of selected properties of samples of modified carboxymethyl cellulose after freeze drying. The investigated properties were changes in thickness, permeability, water sorption, thermal area resistance and thermal absorbing capacity. The prepared materials were evaluated by scanning electron microscopy. The product of presented technology has large internal surface, high wettability and biodegradability. It is nontoxic with high potential in biological applications.

show abstract

Synthesis, characterization, and applied properties of carboxymethyl cellulose and polyacrylamide graft copolymer

Cited by 147 publications

References 12 publications

A pH-, salt- and solvent-responsive carboxymethylcellulose-g-poly(sodium acrylate)/medical stone superabsorbent composite with enhanced swelling and responsive properties

A pH-, salt- and solvent-responsive carboxymethylcellulose-g-poly(sodium acrylate)/medical stone superabsorbent composite with enhanced swelling and responsive properties

Enhanced Absorbent Products Incorporating Cellulose and Its Derivatives: A Review

Properties of modified carboxymethyl cellulose prepared by lyophilisation

Contact Info

Product

Resources

About