Superabsorbent hydrogel composites and nanocomposites: A review

Superabsorbent polymers are hydrophilic networks that can absorb and retain huge amounts of water or aqueous solutions. They are currently used in many areas including hygienic and bio-related uses (particularly in disposable diapers), agricultural uses (e.g., water reserving in soil, soil conditioning, and controlled release of agrochemicals), pharmaceutical dosage forms, separation technology, fibers/textiles, water-swelling rubbers, soft actuators/valves, electrical, construction, packaging, artificial snow, sludge/coal dewatering, fire-extinguishing gels, etc. Addition of clays and organo-modified clays into superabsorbent formulation has funded new generations of these hydrogels, i.e., superabsorbent hydrogel composites (SHCs) and superabsorbent hydrogel nanocomposites (SHNCs). New superabsorbent hydrogels are cheaper in price, and possess superior mechanical properties than non-composite counterparts. This review introduces the SHC and SHNC polymers with the focus on different minerals and humic additives, synthetic methods, the hydrogel characteristics and their applications. POLYM. COMPOS., 2011. © 2010 Society of Plastics Engineers

[1]  Li Wang,et al.  Removal of methylene blue from aqueous solution using chitosan-g-poly(acrylic acid)/montmorillonite superadsorbent nanocomposite , 2008 .

[2]  Lan Wu,et al.  Preparation and characterization of cellulose acetate‐coated compound fertilizer with controlled‐release and water‐retention , 2008 .

[3]  Andi Li,et al.  Synthesis and properties of clay-based superabsorbent composite , 2005 .

[4]  Jihuai Wu,et al.  Influence of the COOH and COONa groups and crosslink density of poly(acrylic acid)/ montmorillonite superabsorbent composite on water absorbency , 2001 .

[5]  Aiqin Wang,et al.  Preparation and characterization of a novel pH-sensitive chitosan-g-poly (acrylic acid)/attapulgite/sodium alginate composite hydrogel bead for controlled release of diclofenac sodium , 2009 .

[6]  Jian Shen,et al.  The preparation and properties of dextrin‐graft‐acrylic acid/montmorillonite superabsorbent nanocomposite , 2009 .

[7]  Aiqin Wang,et al.  Synthesis and characterization of chitosan-g-poly(acrylic acid)/sodium humate superabsorbent , 2007 .

[8]  Aiqin Wang,et al.  Study on superabsorbent composite XVI. Synthesis, characterization and swelling behaviors of poly(sodium acrylate)/vermiculite superabsorbent composites , 2007 .

[9]  Jian Shen,et al.  Synthesis and properties of a poly(acrylic acid)/ montmorillonite superabsorbent nanocomposite , 2006 .

[10]  O. Okay,et al.  Unusual swelling behavior of polymer–clay nanocomposite hydrogels , 2007 .

[11]  Aiqin Wang,et al.  Preparation and swelling properties of superabsorbent nanocomposites based on natural guar gum and organo-vermiculite , 2009 .

[12]  Kun Xu,et al.  Spontaneous volume transition of polyampholyte nanocomposite hydrogels based on pure electrostatic interaction. , 2008, Journal of colloid and interface science.

[13]  P. Butler,et al.  Large Scale Structures in Nanocomposite Hydrogels , 2005 .

[14]  Andi Li,et al.  Studies on poly(acrylic acid)/attapulgite superabsorbent composites. II. Swelling behaviors of superabsorbent composites in saline solutions and hydrophilic solvent–water mixtures , 2004 .

[15]  Y. Bulut,et al.  Synthesis of clay-based superabsorbent composite and its sorption capability. , 2009, Journal of hazardous materials.

[16]  J L West,et al.  Independent Optical Control of Microfluidic Valves Formed from Optomechanically Responsive Nanocomposite Hydrogels , 2005, Advanced materials.

[17]  A. Yousefi,et al.  Effects of structural variables on AUL and rheological behavior of SAP gels , 2009 .

[18]  K. Yurdakoç,et al.  Preparation and characterization of poly(acrylic acid)‐iron rich smectite superabsorbent composites , 2007 .

[19]  Jide Wang,et al.  Modification of Na-bentonite by polycations for fabrication of amphoteric semi-IPN nanocomposite hydrogels , 2009 .

[20]  Aiqin Wang,et al.  Preparation, Swelling Behaviors, and Slow-Release Properties of a Poly(acrylic acid-co-acrylamide)/Sodium Humate Superabsorbent Composite , 2006 .

[21]  Eric Elliott,et al.  Mechanism of Forming Organic/Inorganic Network Structures during In-situ Free-Radical Polymerization in PNIPA−Clay Nanocomposite Hydrogels , 2005 .

[22]  Kazutoshi Haraguchi,et al.  Spontaneous Formation of Characteristic Layered Morphologies in Porous Nanocomposites Prepared from Nanocomposite Hydrogels , 2005 .

[23]  A. Pourjavadi,et al.  Antipolyelectrolyte superabsorbing nanocomposites: Synthesis and properties , 2009 .

[24]  H. Mirzadeh,et al.  Solvent-, ion- and pH-specific swelling of poly(2-acrylamido-2-methylpropane sulfonic acid) superabsorbing gels , 2010 .

[25]  R. Heimann,et al.  Rheological properties of poly(acrylamide)-bentonite composite hydrogels , 1999 .

[26]  Meifang Zhu,et al.  High clay content nanocomposite hydrogels with surprising mechanical strength and interesting deswelling kinetics , 2006 .

[27]  E. Tambourgi,et al.  One-pot synthesis of a chitosan-based hydrogel as a potential device for magnetic biomaterial , 2009 .

[28]  Lin Zhang,et al.  Preparation and morphology of high‐performance exfoliated poly(sodium acrylate)/hydrotalcite nanocomposite superabsorbents , 2009 .

[29]  B. Sreedhar,et al.  First successful design of semi-IPN hydrogel-silver nanocomposites: a facile approach for antibacterial application. , 2008, Journal of colloid and interface science.

[30]  Wen-Fu Lee,et al.  Effect of montmorillonite on the swelling behavior and drug-release behavior of nanocomposite hydrogels , 2003 .

[31]  Kazutoshi Haraguchi,et al.  Nanocomposite gels : new advanced functional soft materials , 2007 .

[32]  N. Sahiner.  In situ metal particle preparation in cross-linked poly(2-acrylamido-2-methyl-1-propansulfonic acid) hydrogel networks , 2006 .

[33]  Aiqin Wang,et al.  Preparation, characterization and properties of superabsorbent nanocomposites based on natural guar gum and modified rectorite , 2009 .

[34]  K. Yao,et al.  Gelatin/montmorillonite hybrid nanocomposite. I. Preparation and properties , 2002 .

[35]  Andi Li,et al.  Utilization of starch and clay for the preparation of superabsorbent composite. , 2007, Bioresource technology.

[36]  Aiqin Wang,et al.  Study on superabsorbent composites XIX. Synthesis, characterization and performance of chitosan-g-poly (acrylic acid)/vermiculite superabsorbent composites , 2009 .

[37]  W. Oppermann,et al.  Swelling, elasticity, and spatial inhomogeneity of poly(N-isopropylacrylamide)/clay nanocomposite hydrogels , 2005 .

[38]  B. Sreedhar,et al.  Controlled silver nanoparticles synthesis in semi-hydrogel networks of poly(acrylamide) and carbohydrates: A rational methodology for antibacterial application , 2009 .

[39]  Peng Chen,et al.  Synthesis and properties of starch grafted poly[acrylamide-co-(acrylic acid)]/montmorillonite nanosuperabsorbent via γ-ray irradiation technique , 2005 .

[40]  Aiqin Wang,et al.  Utilization of Plant Ash for the Fabrication of Novel Superabsorbent Composites with Potassium-Release Characteristics , 2010 .

[41]  A. Durmuş,et al.  Enhanced swelling and adsorption properties of AAm‐AMPSNa/clay hydrogel nanocomposites for heavy metal ion removal , 2008 .

[42]  Jian Shen,et al.  Waste polystyrene foam‐graft‐acrylic acid/montmorillonite superabsorbent nanocomposite , 2007 .

[43]  M. Zohuriaan‐Mehr,et al.  Residual Monomer in Superabsorbent Polymers: Effects of the Initiating System , 2009 .

[44]  R. Heimann,et al.  Development of a novel moisture sensor based on superabsorbent poly(acrylamide)-montmorillonite composite hydrogels , 2001 .

[45]  Aiqin Wang,et al.  Study on superabsorbent composite. IV. Effects of organification degree of attapulgite on swelling behaviors of polyacrylamide/organo-attapulgite composites , 2006 .

[46]  Wen-Fu Lee,et al.  Preparation of reactive mineral powders used for poly(sodium acrylate) composite superabsorbents , 2005 .

[47]  A. Pourjavadi,et al.  Grafted CMC/silica gel superabsorbent composite: Synthesis and investigation of swelling behavior in various media , 2008 .

[48]  A. Pourjavadi,et al.  Protein‐ and homo poly(amino acid)‐based hydrogels with super‐swelling properties , 2009 .

[49]  Herbert Nagorski.  Characterization of a New Superabsorbent Polymer Generation , 1994 .

[50]  N. Ravi,et al.  Hydrogel Nanocomposite as a Synthetic Intra‐Ocular Lens Capable of Accommodation , 2005 .

[51]  Y. Ni,et al.  Alkaline hydrolysis of methyl acrylate grafted cellulose fibers , 2008 .

[52]  M. Zohuriaan‐Mehr,et al.  Superabsorbent hydrogel composites , 2003 .

[53]  M. S. Johnson,et al.  Effect of superabsorbent polymers on survival and growth of crop seedlings , 1991 .

[54]  Aiqin Wang,et al.  Study on Superabsorbent Composite. XX. Effects of Cation-Exchanged Montmorillonite on Swelling Properties of Superabsorbent Composite Containing Sodium Humate , 2009 .

[55]  Andi Li,et al.  Study on superabsorbent composite. V. Synthesis, swelling behaviors and application of poly(acrylic acid‐co‐acrylamide)/sodium humate/attapulgite superabsorbent composite , 2005 .

[56]  Jinghong Ma,et al.  Preparation and characterization of sodium carboxymethylcellulose/poly(N-isopropylacrylamide)/clay semi-IPN nanocomposite hydrogels , 2007 .

[57]  M. Zohuriaan‐Mehr,et al.  Thermo-hydrolytic stability of swelling capacity of superabsorbing composite hydrogels based on AMPS and acrylamide , 2010 .

[58]  H. Mirzadeh,et al.  Chitosan Modified MMT-Poly(AMPS) Nanocomposite Hydrogel: Heating Effect on Swelling and Rheological Behavior , 2010 .

[59]  Wen-Fu Lee,et al.  Effect of intercalated hydrotalcite on swelling and mechanical behavior for poly(acrylic acid-co-N-isopropylacrylamide)/hydrotalcite nanocomposite hydrogels , 2005 .

[60]  Lin Zhang,et al.  Preparation of nanocomposite superabsorbents based on hydrotalcite and poly(acrylic-co-acrylamide) by inverse suspension polymerization , 2008 .

[61]  Superabsorbent polymer composite (SAPC) materials and their industrial and high-tech applications , 2002 .

[62]  Q. Yan,et al.  Frontal polymerization synthesis of starch-grafted hydrogels: Effect of temperature and tube size on propagating front and properties of hydrogels. , 2006, Chemistry.

[63]  L. Liang,et al.  Thermosensitive Poly(N-isopropylacrylamide)−Clay Nanocomposites with Enhanced Temperature Response , 2000 .

[64]  Y. Yi,et al.  Preparation of bentonite–poly[(acrylic acid)-acrylamide] water superabsorbent by photopolymerization , 2006 .

[65]  F. Santiago,et al.  Preparation of composites and nanocomposites based on bentonite and poly(sodium acrylate). Effect of amount of bentonite on the swelling behaviour , 2007 .

[66]  A. Yousefi,et al.  Rheological determination of the swollen gel strength of superabsorbent polymer hydrogels , 2006 .

[67]  Kazutoshi Haraguchi,et al.  Characteristic Sliding Frictional Behavior on the Surface of Nanocomposite Hydrogels Consisting of Organic-Inorganic Network Structure , 2005 .

[68]  Andi Li,et al.  Study on superabsorbent composite. VI. Preparation, characterization and swelling behaviors of starch phosphate-graft-acrylamide/attapulgite superabsorbent composite , 2006 .

[69]  Aiqin Wang,et al.  Evaluation of ammonium removal using a chitosan-g-poly (acrylic acid)/rectorite hydrogel composite. , 2009, Journal of hazardous materials.

[70]  A. Deshpande,et al.  Rheology of poly(sodium acrylate) hydrogels during cross-linking with and without cellulose microfibrils , 2009 .

[71]  Aiqin Wang,et al.  Study on superabsorbent composites. IX: Synthesis, characterization and swelling behaviors of polyacrylamide/clay composites based on various clays , 2007 .

[72]  M. Chu,et al.  Influence of Potassium Humate on the Swelling Properties of a Poly(acrylic acid-co-acrylamide) Potassium Humate Superabsorbent Composite , 2008 .

[73]  Haixia Qiu,et al.  Polyacrylate/(carboxymethylcellulose modified montmorillonite) superabsorbent nanocomposite: Preparation and water absorbency , 2008 .

[74]  V. Athawale,et al.  Recent Trends in Hydrogels Based on Starchgraft‐Acrylic Acid: A Review , 2001 .

[75]  K. Kabiri,et al.  Porous Superabsorbent Hydrogel Composites: Synthesis, Morphology and Swelling Rate , 2004 .

[76]  Hong Gao,et al.  Synthesis and Properties of Sepiolite/poly (acrylic acid-co-acrylamide) Nanocomposites , 2005 .

[77]  Guoxi Xi,et al.  Synthesis of wheat straw-g-poly(acrylic acid) superabsorbent composites and release of urea from it , 2009 .

[78]  Kun Xu,et al.  Polyampholytes superabsorbent nanocomposites with excellent gel strength , 2007 .

[79]  Toru Takehisa,et al.  Nanocomposite Hydrogels: A Unique Organic–Inorganic Network Structure with Extraordinary Mechanical, Optical, and Swelling/De‐swelling Properties , 2002 .

[80]  ZhengHua Deng,et al.  Thermoswitchable Electronic Properties of a Gold Nanoparticle/Hydrogel Composite , 2005 .

[81]  Jihuai Wu,et al.  Synthesis and properties of starch-graft-polyacrylamide/ clay superabsorbent composite , 2000 .

[82]  Wen-Fu Lee,et al.  Effect of intercalated reactive mica on water absorbency for poly(sodium acrylate) composite superabsorbents , 2005 .

[83]  R. Heimann,et al.  Structure and mechanical properties of superabsorbent poly(acrylamide)-montmorillonite composite hydrogels , 1993 .

[84]  Mingzhu Liu,et al.  Preparation and properties of diatomite composite superabsorbent , 2007 .

[85]  Aiqin Wang,et al.  Study on superabsorbent composites. XVIII. Preparation, characterization, and property evaluation of poly(acrylic acid-co-acrylamide)/organomontmorillonite/sodium humate superabsorbent composites , 2008 .

[86]  Andi Li,et al.  Preparation, swelling behaviors and application of polyacrylamide/attapulgite superabsorbent composites , 2006 .

[87]  A. Durmuş,et al.  Dye removal by a novel hydrogel-clay nanocomposite with enhanced swelling properties , 2008 .

[88]  H. Mirzadeh,et al.  Chitosan-modified nanoclay-poly(AMPS) nanocomposite hydrogels with improved gel strength , 2009 .

[89]  Aiqin Wang,et al.  Study on superabsorbent composite. III. Swelling behaviors of polyacrylamide/attapulgite composite based on acidified attapulgite and organo-attapulgite , 2005 .

[90]  Ji Zhang,et al.  Preparation and properties of polyacrylate/bentonite superabsorbent hybrid via intercalated polymerization , 2007 .

[91]  Andi Li,et al.  Studies on poly(acrylic acid)/attapulgite superabsorbent composite. I. Synthesis and characterization , 2004 .

[92]  N. Kim,et al.  Novel PAAm/Laponite clay nanocomposite hydrogels with improved cationic dye adsorption behavior , 2008 .

[93]  Kun Xu,et al.  The Effect of MMT/Modified MMT on the Structure and Performance of the Superabsorbent Composite , 2008 .

[94]  Li‐Ming Zhang,et al.  Studies of sodium humate/polyacrylamide/clay hybrid hydrogels. I. Swelling and rheological properties of hydrogels , 2007 .

[95]  Dajun Chen,et al.  Preparation of a novel pH-responsive silver nanoparticle/poly (HEMA-PEGMA-MAA) composite hydrogel , 2007 .

[96]  Ö. Üzüm,et al.  Swelling and dye sorption studies of acrylamide/2-acrylamido-2-methyl-1-propanesulfonic acid/bentonite highly swollen composite hydrogels , 2008 .

[97]  Aiqin Wang,et al.  Adsorption characteristics of Cu(II) from aqueous solution onto poly(acrylamide)/attapulgite composite. , 2009, Journal of hazardous materials.

[98]  Yu-Chen Huang,et al.  Swelling and antibacterial properties for the superabsorbent hydrogels containing silver nanoparticles , 2007 .

[99]  Jihuai Wu,et al.  Study on starch-graft-acrylamide/mineral powder superabsorbent composite , 2003 .

[100]  I. Willner,et al.  Control of the Electronic Properties of Thermosensitive Poly(N‐isopropylacrylamide) and Au‐Nano‐particle/Poly(N‐isopropylacrylamide) Composite Hydrogels upon Phase Transition , 2002 .

[101]  G. Güçlü,et al.  Removal of acidic dye from aqueous solutions using poly(DMAEMA–AMPS–HEMA) terpolymer/MMT nanocomposite hydrogels , 2009 .

[102]  Wen-Fu Lee,et al.  Superabsorbent polymeric materials. XII. Effect of montmorillonite on water absorbency for poly(sodium acrylate) and montmorillonite nanocomposite superabsorbents , 2004 .

[103]  A. Mucientes,et al.  Synthesis and swelling behaviour of poly (sodium acrylate)/sepiolite superabsorbent composites and nanocomposites , 2006 .

[104]  G. Güçlü,et al.  Synthesis and properties of starch‐graft‐acrylic acid/Na‐montmorillonite superabsorbent nanocomposite hydrogels , 2008 .

[105]  A. Pourjavadi,et al.  Taguchi optimized synthesis of collagen-g-poly(acrylic acid)/kaolin composite superabsorbent hydrogel , 2008 .

[106]  Aiqin Wang,et al.  Synthesis, characterization and swelling behaviors of sodium alginate-g-poly(acrylic acid)/sodium humate superabsorbent , 2009 .

[107]  Lan Wu,et al.  Preparation and properties of chitosan-coated NPK compound fertilizer with controlled-release and water-retention , 2008 .

[108]  Aiqin Wang,et al.  Preparation, Swelling, and Slow-Release Characteristics of Superabsorbent Composite Containing Sodium Humate , 2008 .

[109]  P. Sahoo,et al.  Synthesis and biodegradability of starch-g-ethyl methacrylate/sodium acrylate/sodium silicate superabsorbing composite , 2006 .

[110]  W. Borchard,et al.  Synthesis and characterization of glass-containing superabsorbent polymers , 2005 .

[111]  Hossein Omidian,et al.  Synthesis of fast-swelling superabsorbent hydrogels: effect of crosslinker type and concentration on porosity and absorption rate , 2003 .

[112]  S. Jana,et al.  Mechanism of Exfoliation of Nanoclay Particles in Epoxy−Clay Nanocomposites , 2003 .

[113]  K. Yurdakoç,et al.  Preparation and characterization of poly(acrylic acid)/pillared clay superabsorbent composite , 2009 .

[114]  R. Heimann,et al.  Box—Behnken design applied to study the strengthening of aluminate concrete modified by a superabsorbent polymer/clay composite , 1997 .

[115]  Aiqin Wang,et al.  Fast removal of ammonium nitrogen from aqueous solution using chitosan-g-poly(acrylic acid)/attapulgite composite , 2009 .

[116]  M. Kokabi,et al.  PVA–clay nanocomposite hydrogels for wound dressing , 2007 .

[117]  N. Kim,et al.  Swelling behavior of polyacrylamide/laponite clay nanocomposite hydrogels: pH-sensitive property , 2009 .

[118]  Lan Wu,et al.  Preparation and properties of a double-coated slow-release NPK compound fertilizer with superabsorbent and water-retention. , 2008, Bioresource technology.

[119]  San-Yuan Chen,et al.  Drug release behavior of chitosan-montmorillonite nanocomposite hydrogels following electrostimulation. , 2008, Acta biomaterialia.

[120]  Toru Takehisa,et al.  Effects of Clay Content on the Properties of Nanocomposite Hydrogels Composed of Poly(N-isopropylacrylamide) and Clay , 2002 .

[121]  Andi Li,et al.  Synthesis and characterization of multifunctional poly(acrylic acid-co-acrylamide)/sodium humate superabsorbent composite , 2006 .

[122]  H. Mirzadeh,et al.  Undesirable effects of heating on hydrogels , 2008 .

[123]  Wen-Fu Lee,et al.  Effect of hydrotalcite on the physical properties and drug-release behavior of nanocomposite hydrogels based on poly[acrylic acid-co-poly(ethylene glycol) methyl ether acrylate] gels , 2004 .

[124]  Wen-Fu Lee,et al.  Effect of bentonite on the physical properties and drug‐release behavior of poly(AA‐co‐PEGMEA)/bentonite nanocomposite hydrogels for mucoadhesive , 2004 .

[125]  Aiqin Wang,et al.  Preparation and Properties of Chitosan-g-poly(acrylic acid)/Montmorillonite Superabsorbent Nanocomposite via in Situ Intercalative Polymerization , 2007 .