Grafted CMC/silica gel superabsorbent composite: Synthesis and investigation of swelling behavior in various media

Pourjavadi, Ali; Seidi, Farzad; Satha, Hamid; Soleyman, Rouhollah

doi:10.1002/app.27998

Cited by 23 publications

(23 citation statements)

References 31 publications

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“…There is an interesting parallel between the effects of spacers and the effects of certain very fine mineral products, which were mentioned earlier (Pourjavadi et al 2008;Zhang et al 2008b;2009;Wang et al , 2011aEl Salmawi and Ibrahim 2011). Such nano-minerals, if poorly adhered to the adjacent polymeric material, can be expected to allow the opening up of fluid-filled spaces within the hydrogel.…”

Section: Cross-link Lengthmentioning

confidence: 87%

“…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). Copolymers incorporating CMC have also been prepared with polyvinyl alcohol (El Salmawi 2007), hydroxyethyl cellulose (Oppermann 1995;Lionetto et al 2003;Sannino and Nicolais 2005;Demitri et al 2008;Dai and Kadla 2009), and with hydroxypropylethyl cellulose (Faroongwarng and Sukonrat 2008).…”

Section: Copolymers Of Cmc By Reaction With Monomersmentioning

confidence: 96%

“…As one might expect based on environmental concerns, many researchers have investigated the preparation of "all-natural-based" hydrogels incorporating cellulose or its derivatives (Harsh and Gehrke 1991;Barbucci et al 2000;Bin et al 2000;Fei et al 2000;Wach et al 2001Wach et al , 2002Hirsh and Spontak 2002;Liu et al 2002Liu et al , 2005aRodriguez et al 2003;Sannino et al 2003Sannino et al , 2004aSannino and Nicolais 2005;Yoshimura et al 2006;Demitri et al 2008;Faroongwang and Sukonrat 2008;Pourjavadi et al 2008Pourjavadi et al , 2010Chang et al 2009Chang et al , 2010Dai and Kadla 2009;El Salmawi and Ibrahim 2011;Salam et al 2011a,b;Wang et al 2011b;Kono and Fujita 2012;Pan and Ragauskas 2012;. For instance, a hydrogel based on a combination of cellulose and CMC can be prepared from a solution of the ingredients in a NaOH/urea solvent system .…”

Section: Hydrogels Based On Cellulose With Other Natural-based Polymersmentioning

confidence: 99%

“…"nanoclay", or other finely divided minerals have been added to the formulation during the preparation of SAPs (Pourjavadi and Ghasemzadeh 2006;Pourjavadi et al 2008;Dai and Kadla 2009;Zhang et al 2008b;2009;Wang et al , 2011aAnirudhan et al 2011;Bao et al 2011;Chang and Zhang 2011;El Salmawi and Ibrahim 2011;Kabiri et al 2011). In some cases the inclusion of nano-sized mineral particles during hydrogel preparation yielded a substantial increase in water absorption capacity (Pourjavadi et al 2008;Zhang et al 2008b;2009;Wang et al , 2011aEl Salmawi and Ibrahim 2011), whereas in some other cases the nanominerals tended to suppress absorbency (Pourjavadi and Ghasemzadeh 2006;Dai and Kadla 2009). A possible mechanism to account for the enhancement of absorption, in the cases indicated, could be a debonding effect, allowing pools of fluid to occupy openings that are made available by poor bonding of the adjacent SAP material to a suitably sized mineral surface.…”

Section: Integration Of Cellulosic Solids Into Sapsmentioning

confidence: 99%

“…Hydrogels that contain carboxylic groups generally exhibit increasing absorbency with increasing pH, especially within the pH range of about 3 to 7; the following examples are from studies involving cellulose-based materials in SAPs (Barbucci et al 2000;Harsh and Gehrke 1991;Sannino and Nicolais 2005;Pourjavadi et al 2008;Anirudhan et al 2011;Bao et al 2011;Wang et al 2011a). The effect has been attributed to dissociation of the groups to the carboxylate form (Barbucci et al 2000).…”

Section: Ionizable Groups and Absorbencymentioning

confidence: 99%

See 4 more Smart Citations

Enhanced Absorbent Products Incorporating Cellulose and Its Derivatives: A Review

Hubbe¹,

Ayoub²,

Daystar³

et al. 2013

BioResources

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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.

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Section: Cross-link Lengthmentioning

confidence: 87%

Section: Copolymers Of Cmc By Reaction With Monomersmentioning

confidence: 96%

Section: Hydrogels Based On Cellulose With Other Natural-based Polymersmentioning

confidence: 99%

Section: Integration Of Cellulosic Solids Into Sapsmentioning

confidence: 99%

Section: Ionizable Groups and Absorbencymentioning

confidence: 99%

See 3 more Smart Citations

Enhanced Absorbent Products Incorporating Cellulose and Its Derivatives: A Review

Hubbe¹,

Ayoub²,

Daystar³

et al. 2013

BioResources

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show abstract

Superabsorbent Materials

Wang¹,

Wang²

2009

Kirk-Othmer Encyclopedia of Chemical Technology

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Superabsorbent materials (SAMs) are hydrophilic polymer networks that can rapidly absorb water at amounts hundreds or even thousands times their own mass, and they can retain the absorbed water for a long time even under some pressure. Because of their excellent properties, SAMs are mainly used in disposable hygiene products as substitutes for traditional absorbents (cotton, sponge, wood pulp, and colloidal silica) and used in modern agriculture as water‐saving materials. Since the commercialization of the first SAM in 1978, the global yield and consumption of SAM was dramatically increased year by year, and the applications of such materials were also extended to other fields, such as wastewater treatment, medicine, construction, and sealing materials. Although SAMs are only decades old, they has developed into one of the most potential and prospective polymer materials in the market. Common SAMs are generally white sugar‐like hygroscopic materials, which can be classified as the following three types: starch‐based SAM, cellulose‐based SAM, and synthetic SAM. Today, the common commercial SAMs are cross‐linked sodium polyacrylate prepared through solution or inverse‐suspension polymerization techniques. In allusion to the drawbacks of currently prepared SAMs (including low salt‐resistance, high production cost, and poor gel strength), multiple kinds of raw materials and preparation methods were developed and adopted by manufacturers. Based on the above description, the development background, characteristics, chemical structures, type, physical and chemical properties of SAM, and the corresponding applied research works and future development prospects are introduced in this article.

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Salep‐g‐poly(sodium acrylate)/alumina as an environmental‐sensitive biopolymer superabsorbent composite: Synthesis and investigation of its swelling behavior

et al. 2011

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ABSTRACT:A novel kind of a biopolymer-based superabsorbent composite, salep-g-poly(sodium acrylate)/alumina, was prepared from salep, sodium acrylate, and alumina by aqueous polymerization, using N,N -methylenebisacrylamide (MBA) as a cross-linker and ammonium persulfate (APS) as an initiator. The reaction parameters [i.e., acrylic acid (AA), MBA, APS amounts, and neutralization percentage of AA as well as alumina/salep weight ratio] affecting the water absorbency of the hydrogel composite were optimized using systematic method to achieve a composite with high swelling capacity as possible. The swelling behavior of optimum superabsorbent composite was measured in various pH solutions. In addition, swelling kinetics, swelling in various NaCl concentrations, swelling in various solvents, and the absorbency underload were investigated. Also, pH-reversibility and the on-off switching behaviors of the composite in various environments were investigated. C 2011 Wiley Periodicals, Inc. Adv Polym Techn 31: 41-51, 2012; View this article online at wileyonlinelibrary.com.

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Grafted CMC/silica gel superabsorbent composite: Synthesis and investigation of swelling behavior in various media

Cited by 23 publications

References 31 publications

Enhanced Absorbent Products Incorporating Cellulose and Its Derivatives: A Review

Enhanced Absorbent Products Incorporating Cellulose and Its Derivatives: A Review

Superabsorbent Materials

Salep‐g‐poly(sodium acrylate)/alumina as an environmental‐sensitive biopolymer superabsorbent composite: Synthesis and investigation of its swelling behavior

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