Highly porous, fast responding acrylamide hydrogels through emulsion polymerization using coconut oil
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Mihisirini Bhagya Dharmasiri
Abstract
Conventional acrylamide hydrogel exhibits a slow swelling rate which limits its potential for novel applications. It is a formidable challenge to increase the rate of swelling and if addressed successfully, this paves new paths for significant advanced applications. Fast responding polyacrylamide hydrogels with microporous structures and an interconnected network of capillary channels have been successfully synthesized by free radical emulsion-templated polymerization (a 2.5 m acrylamide monomer solution was crosslinked with 1% N,N-methylenebisacrylamide using 5% potassium persulfate as the initiator). Virgin coconut oil (70% v/v) was used as the pore forming agent, which was dispersed in the aqueous monomer solution by using 5% non-ionic surfactant (Tween 80®). Developed porous acrylamide hydrogel displayed approximately 600 wt% water absorptivity compared to the dry weight of the sample in 15 s at 30°C. Swelling ratio and scanning electron microscopy studies uncovered the characteristic microporous structure of the hydrogel. Pores of the hydrogel are interconnected to form capillary channels and thus they are responsible for the higher swelling rate of the hydrogel.
Acknowledgments
The Center for Advanced Material Research and Instrument Center of the Faculty of Applied Sciences, University of Sri Jayewardenepura facilitated the instrumental analysis for this study.
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©2020 Walter de Gruyter GmbH, Berlin/Boston
Artikel in diesem Heft
- Frontmatter
- Material properties
- The effect of unidirectional shear flow-induced orientation on foaming properties of polypropylene
- An investigation on electro-induced shape memory performances of CE/EP/CB/SCF composites applied for deployable structure
- Nanocomposite film with green synthesized TiO2 nanoparticles and hydrophobic polydimethylsiloxane polymer: synthesis, characterization, and antibacterial test
- Preparation and assembly
- Binary solvent systems for durable self-adhesive conductive hydrogels
- Development of surface properties of ultra-high-molecular-weight polyethylene film using side-chain crystalline block copolymers
- Highly porous, fast responding acrylamide hydrogels through emulsion polymerization using coconut oil
- Engineering and processing
- Multizone barrel temperature control of the eccentric rotor extrusion process
- The influence of mold temperature on thermoset in-mold forming
- Innovative γ rays irradiated styrene butadiene rubber/reclaimed waste tire rubber blends: a comparative study using mechano-chemical and microwave devulcanizing methods
- Experimental study on influence of molding parameters on self-reinforcement characteristics of polymer co-injection molding
Artikel in diesem Heft
- Frontmatter
- Material properties
- The effect of unidirectional shear flow-induced orientation on foaming properties of polypropylene
- An investigation on electro-induced shape memory performances of CE/EP/CB/SCF composites applied for deployable structure
- Nanocomposite film with green synthesized TiO2 nanoparticles and hydrophobic polydimethylsiloxane polymer: synthesis, characterization, and antibacterial test
- Preparation and assembly
- Binary solvent systems for durable self-adhesive conductive hydrogels
- Development of surface properties of ultra-high-molecular-weight polyethylene film using side-chain crystalline block copolymers
- Highly porous, fast responding acrylamide hydrogels through emulsion polymerization using coconut oil
- Engineering and processing
- Multizone barrel temperature control of the eccentric rotor extrusion process
- The influence of mold temperature on thermoset in-mold forming
- Innovative γ rays irradiated styrene butadiene rubber/reclaimed waste tire rubber blends: a comparative study using mechano-chemical and microwave devulcanizing methods
- Experimental study on influence of molding parameters on self-reinforcement characteristics of polymer co-injection molding
