Hydrogel: Preparation, characterization, and applications: A review

Ahmed, Enas M.

doi:10.1016/j.jare.2013.07.006

Cited by 4,280 publications

(2,324 citation statements)

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“…Hydrogel products are a group of polymeric material which have hydrophilic structure that is responsible for their ability to hold large amounts of water in threedimensional network. A detailed method of its preparation, characterization, and application has been reviewed by Ahmed [90]. A hydrogel can be stimulated by various methods as shown in Fig.…”

Section: Bio-mimicked Lubrication Inspired By Catfish Skin Mucus Usinmentioning

confidence: 99%

“…But still, these artificial lubricants are yet be used efficiently for an engineering application as its use is limited to lubricating layer of few microns and low load conditions. Hence, most of its application are currently limited to medical field as reported by Ahmed [90].…”

Section: Bio-mimicked Lubrication Inspired By Catfish Skin Mucus Usinmentioning

confidence: 99%

“…This high speed during ascent is attributed to Fig. 15 Various stimulis' to make a hydrogel swell (absorb water) [90] Fig. 16 a COF of catfish skin under varying environment conditions; b.…”

Section: Air Lubrication Of Emperor Penguins To Propelmentioning

confidence: 99%

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Advances in Bio-inspired Tribology for Engineering Applications

Siddaiah

Menezes

2016

J Bio Tribo Corros

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Bio-inspired tribology is an interdisciplinary field of science where scientists and engineers seek to investigate and incorporate tribological properties encountered in biological beings into engineering applications. In this paper, bio-inspired tribological research that are speculated to have a huge impact on tribological applications have been reviewed. These research involve (1) investigations related to replication of lubricin found in synovial fluids of mammalian joints which have super-low friction values that can be utilized in IC engines, (2) surface replication concerning to superhydrophobic properties of gecko skin which is seen to have anti-wetting and selfcleaning properties, (3) friction-reducing shark skin through specialized nanoparticle coatings that is seen to give a different perspective on surface texturing, (4) new techniques, such as soft lithography to replicate surfaces of lotus leaf and air lubrication phenomenon inspired by emperor penguins that is being applied to propel boats, ships, and torpedoes faster by reducing skin friction underwater. Further, an investigation in self-healing materials inspired from pitcher plant that has led to the innovation of self-healing and slippery liquid-infused porous surfaces has been discussed. These research works reviewed not only provide a deep insight into the current advances in bio-inspired tribology but also helps understand the plausibility of the research applications in the future and the practicality of innovations possible.

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Section: Bio-mimicked Lubrication Inspired By Catfish Skin Mucus Usinmentioning

confidence: 99%

Section: Bio-mimicked Lubrication Inspired By Catfish Skin Mucus Usinmentioning

confidence: 99%

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Advances in Bio-inspired Tribology for Engineering Applications

Siddaiah

Menezes

2016

J Bio Tribo Corros

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“…The major bioink material used in tissue biofabrication and 3D bioprinting is hydrogel matrix and usually nature-derived. It is because of that high-water content of hydrogel, up to 1000 times of their original weight in aqueous media [16], enables well penetration of oxygen, nutrients, growth factors and other water-soluble components, thereby making them very suitable for tissue or organoid fabrication [17]. Recent advances in bioink materials for constructing 3D cell environments have greatly promoted the development of tissue engineering.…”

Section: Introductionmentioning

confidence: 99%

3D bioprinting for cell culture and tissue fabrication

Jian

Wang

et al. 2018

Bio-des. Manuf.

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Three-dimensional (3D) bioprinting is a computer-assisted technology which precisely controls spatial position of biomaterials, growth factors and living cells, offering unprecedented possibility to bridge the gap between structurally mimic tissue constructs and functional tissues or organoids. We briefly focus on diverse bioinks used in the recent progresses of biofabrication and 3D bioprinting of various tissue architectures including blood vessel, bone, cartilage, skin, heart, liver and nerve systems. This paper provides readers a guideline with the conjunction between bioinks and the targeted tissue or organ types in structuration and final functionalization of these tissue analogues. The challenges and perspectives in 3D bioprinting field are also illustrated.

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“…Several applications for hydrogels have been developed in biomedical and industrial fields such as artificial implants, contact lenses, enzyme immobilization (4)(5)(6) . Recent applications for hydrogels are interesting in drug delivery and agriculture in which water release from hydrogel is essential features (7)(8)(9)(10)(11)(12) . Radiation crosslinking is considered as clean and effective method for hydrogel preparation.…”

mentioning

confidence: 99%

Bio-based Hydrogel Formed by Gamma Irradiation

2016

Egypt. J. Chem.

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ARBOXYMETHYL chitosan (CMCt) was synthesized through ….. carboxymethylation reaction for chitosan. The prepared (CMCt) was subjected to crosslinking reaction by using γ-radiation. Different process parameters were investigated to clarify the effect of radiation dose, pH, and time upon the gel fraction and swelling properties of the produced hydrogels. The gel fraction was reduced after radiation dose 20 KG. The swelling% was dependent on the paste concentrations. At higher paste concentrations, 30-40% higher doses of γ-radiation, 20 KG, were required for optimum swelling. The high concentration paste, 40%, showed superior swelling in alkaline medium, pH > 8, while lower concentration paste manifested optimum swelling in neutral medium, pH = 7. The prepared (CMCt) hydrogels were characterized by FTIR, SEM, DSC and swelling kinetics.Keywords: Carboxymethyl chitosan (CMCt), Hydrogel, γ-ray radiation, Swelling, FTIR, SEM and DSC.Hydrogels are three-dimensional structure of cross-linked polymer, which have affinity for water absorption (1) . The hydrogel matrix has been hold by chemical or physical cross-linking that involves hydrophilic groups of homopolymers or copolymers (2) . Hydrogels swell in water by retaining a significant fraction of water within the pores structure without dissolving (3) . Several applications for hydrogels have been developed in biomedical and industrial fields such as artificial implants, contact lenses, enzyme immobilization (4)(5)(6) . Recent applications for hydrogels are interesting in drug delivery and agriculture in which water release from hydrogel is essential features (7)(8)(9)(10)(11)(12) . Radiation crosslinking is considered as clean and effective method for hydrogel preparation. On comparison with conventional hydrogel preparation, cross-linking through irradiation process did not need initiators, or chemical cross-linking. Radiation methods are efficient and safe alternative for cross-linking without using toxic additives (13) . Lugao reviewed the application of radiation processing in preparing hydrogels (14) . It was shown that the radiation technique is a powerful tool for controlling the degree of cross-linking of the produced hydrogels. Hydrogels, biodegradable and biocompatible polymers, obtained by irradiation cross-linking have a variety of applications, in different fields, such as biomedical devices (15) and control release of drug (16) .

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Hydrogel: Preparation, characterization, and applications: A review

Abstract: Graphical abstract

Cited by 4,280 publications

References 65 publications

Advances in Bio-inspired Tribology for Engineering Applications

Advances in Bio-inspired Tribology for Engineering Applications

3D bioprinting for cell culture and tissue fabrication

Bio-based Hydrogel Formed by Gamma Irradiation

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