Preparation of TiO<sub>2</sub>-P(AM-AA) organic-inorganic composite water-retaining agent based on photocatalytic surface-initiated polymerization

Although acrylic acid-based superabsorbent hydrogels (SAHs) are widely used in hygiene and personal care applications, the low degrees of true ionization in such SAHs under practical application places a limit on the degree of superabsorbency that can be achieved. Herein, the preparation and optimization of SAHs based on copolymers of acrylic acid (AA) with 2-acrylamido-2-methylpropane sulfonic acid (AMPS), a strong acid comonomer that remains ionized at all relevant physiological pH values, is described. AA-AMPS recipes optimized using a central composite design response surface method demonstrate significantly enhanced absorbance under load (AUL) values (>15-20% increase) and comparable centrifuge retention capacity (CRC) values compared to the corresponding AA-only controls while maintaining strong mechanics even in the swollen state (as much as twice the modulus of the commercial AA-based superabsorbent). The simplicity of this recipe, coupled with the reproducible achievement of the improved superabsorbency properties using a small adaptation of the commercial SAH synthesis protocol, makes AA-AMPS superabsorbent hydrogels potential candidates for use in commercial hygiene products.

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Design and optimization of superabsorbent hydrogels based on acrylic acid/2‐acrylamido‐2‐methylpropane sulfonic acid copolymers

Farsangi

Song

Yang

et al. 2022

J of Applied Polymer Sci

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Impact of composition and salinity on swelling and gel strength of poly (acrylamide-co-acrylic acid) preformed particle gel

et al. 2023

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The effects of various material compositions and reservoir environments on the ultimate strength and swelling kinetics of a commercial preformed particle gel (PPG) have been investigated. This study used different ratios of acrylamide and acrylic acid copolymers with a specific crosslinker concentration. Results have indicated that increasing the acrylic acid proportion enhances the PPGs’ ability to swell but weakens their network structure. In contrast, increasing the crosslinker content decreases the swelling ratio and increases the gel strength. The highest equilibrium swelling capacity among the six preformed particle gel samples was obtained for PPG2, which has the highest acrylic acid amount and the lowest crosslinker content, with a swelling ratio of 2400 g/g in deionized water and 59.8 g/g in brine 1 (67535.8 mg/l). On the contrary, PPG5, with the lowest acrylic acid and highest crosslinker content, has a swelling capacity of 239 g/g and more than 17 g/g in distilled and brine 1, respectively. Yet, PPG5 has the highest swollen gel strength of 615.5 Pa in deionized water and 3344 Pa in brine 1. The PPGs’ swelling ratios showed stepwise improvements along with increasing temperature, notably after 50 °C, yet, the storage modulus (G′) was negatively affected. The PPGs revealed the highest swelling behavior in pH 6–8, decreasing dramatically in more acidic and basic conditions. The swelling ratios of the PPGs in brine 1 at 50 °C were between 12 and 32 g/g, having strengths in the range of 566–5508 Pa, depending on the crosslinker ratio. The PPGs also demonstrated the ability to compete with other commercial PPGs as they have shown physical and thermal stability when aging at 50 °C, specifically those with high crosslinker content (PPG5).

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Long-lasting anti-bacterial activity and bacteriostatic mechanism of tea tree oil adsorbed on the amino-functionalized mesoporous silica-coated by PAA

Zhou

Shen

Zhu

et al. 2020

Colloids and Surfaces B: Biointerfaces

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Preparation of TiO₂-P(AM-AA) organic-inorganic composite water-retaining agent based on photocatalytic surface-initiated polymerization

Cited by 4 publications

References 35 publications

Design and optimization of superabsorbent hydrogels based on acrylic acid/2‐acrylamido‐2‐methylpropane sulfonic acid copolymers

Design and optimization of superabsorbent hydrogels based on acrylic acid/2‐acrylamido‐2‐methylpropane sulfonic acid copolymers

Impact of composition and salinity on swelling and gel strength of poly (acrylamide-co-acrylic acid) preformed particle gel

Long-lasting anti-bacterial activity and bacteriostatic mechanism of tea tree oil adsorbed on the amino-functionalized mesoporous silica-coated by PAA

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Preparation of TiO2-P(AM-AA) organic-inorganic composite water-retaining agent based on photocatalytic surface-initiated polymerization

Cited by 4 publications

References 35 publications

Design and optimization of superabsorbent hydrogels based on acrylic acid/2‐acrylamido‐2‐methylpropane sulfonic acid copolymers

Design and optimization of superabsorbent hydrogels based on acrylic acid/2‐acrylamido‐2‐methylpropane sulfonic acid copolymers

Impact of composition and salinity on swelling and gel strength of poly (acrylamide-co-acrylic acid) preformed particle gel

Long-lasting anti-bacterial activity and bacteriostatic mechanism of tea tree oil adsorbed on the amino-functionalized mesoporous silica-coated by PAA

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Product

Resources

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Preparation of TiO₂-P(AM-AA) organic-inorganic composite water-retaining agent based on photocatalytic surface-initiated polymerization