Swelling behavior of novel protein‐based superabsorbent nanocomposite

Abstract

A novel superabsorbent nanocomposite based on hydrolyzed collagen was synthesized by simultaneously graft copolymerization of 2-acrylamido-2-methylpropane sulfonic acid (AMPS) and acrylamide (AAm). Sodium montmorilonite (Na-MMt) was used as clay. Methylenebisacrylamide (MBA) and ammonium persulfate (APS) were used as crosslinker and initiator, respectively. The effect of reaction variables such as nanoclay content, MBA and APS concentrations as well as the AMPS/AAm weight ratio on the water absorbency of nanocomposites was investigated. Although the water absorbency was decreased by increasing of MBA concentration, an opti-mum swelling capacity was achieved for clay, APS, and AMPS/AAm variables. The structure of nanocomposite was identified using FTIR spectroscopy, XRD patterns, and scanning electron microscopy graphs. The effect of swelling media comprising various dissolved salts and different pHs was studied. Also, water retention capacity was studied, and the results showed that inclusion of Na-MMt nanoclay causes an increase in water retention under heating.

Effect of pH and nanoclay content on the morphology and physicochemical properties of soy protein/montmorillonite nanocomposite obtained by extrusion

“…The incorporation of this type of materials leads to an increase in water uptake capacity, and, at the same time, enhances the mechanical properties of the hydrogel (especially strength and stiffness) [9]. However, the dispersion of such nanoclay platelets or stacks within a polymer structure is complex and its efficient dispersion in biopolymer matrices is a key problem in the development of biodegradable nanocomposites, in which it is desirable for the material to be exfoliated to improve nanocomposite properties.…”

Synthesis and properties of collagen-g-poly(sodium acrylate-co-2-hydroxyethylacrylate) superabsorbent hydrogels

“…In recent years, much interest has been shown in the development of the synthesis of natural-based superabsorbent hydrogels (Bagheri Marandi et al, 2011;Hua and Wang, 2009;Sadeghi and Hosseinzadeh, 2010;Zhang et al, 2007;Wang et al, 2009;Zheng and Wang, 2009;Chen et al, 2009). These biopolymer materials are crosslinked hydrophilic polymers, capable of absorbing large quantities of water, saline or physiological solutions (Buchholz and Graham, 1997;Peppas and Harland, 1990).…”

Effect of Organic Montmorillonite Type on the Swelling Behavior of Superabsorbent Nanocomposites

“…Because of its low cost and unique characteristic such as good water adsorption, extensive swelling in water, and cation exchange capacity, montmorillonite (MMT) as inorganic layered clay is the interest of researchers. [10][11][12][13][14][15][16] But MMT lacks affinity with organic polymer because of their hydrophilic nature. The inorganic and organic phases are quite incompatible, resulting in phase separation.…”

“…[10][11][12][13][14][15][16] But MMT lacks affinity with organic polymer because of their hydrophilic nature. The inorganic and organic phases are quite incompatible, resulting in phase separation.…”