Swelling behaviors, tensile properties and thermodynamic studies of water sorption of 2-hydroxyethyl methacrylate/epoxy methacrylate copolymeric hydrogels

Wang, Jianquan; Wu, Wenhui

doi:10.1016/j.eurpolymj.2004.11.034

Cited by 80 publications

(38 citation statements)

References 31 publications

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“…Therefore, the small sized fibre filled composites sorb less solvent than the untreated counterparts. The diffusion coefficient is also related to penetration rate (P r ) as shown in equation 10. The penetration rate may be expressed by the rate of the advancing swollen fronts which could be calculated from the linear portion of the sorption curve.…”

Section: Diffusion Coefficient (D)mentioning

confidence: 99%

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Organic Solvents Transport Through Alkali-Treated Agro-waste Microfibre Incorporated with Low Density Polyethylene Composites

Obasi¹

2017

AJPST

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Abstract:We report the transport behaviour of low density polyethylene composites containing both untreated and alkalitreated agro-waste microfibre in three aromatic organic solvents (benzene, toluene, and xylene) at 40, 60 and 80°C by the conventional weight-gain method. The effects of fibre content, alkali treatment, and filler particle size on solvent sorption were analysed. Transport parameters such as diffusion coefficient, sorption coefficient, and permeation coefficient have been calculated in terms of microfibre content, particle size, nature of the solvent, and temperature. It was observed that all the systems follow the Fickian mode of transport on increasing temperature. The van't Hoff's relationship was used to determine the thermodynamic parameters and was found that the estimated free energies of sorption were all positive, indicating nonspontaneity of the solubility of micro fibre/LDPE composites. The first order kinetic rate constant and swelling parameters were also evaluated.

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Section: Diffusion Coefficient (D)mentioning

confidence: 99%

“…The diffusion of solvents through polymeric films, filled blends, membranes and composites have been investigated by several researchers [7][8][9][10][11][12][13]. Cates and White [14][15][16] were among the pioneer researchers to study the diffusion of solvents through polymeric membranes.…”

Section: Introductionmentioning

confidence: 99%

Organic Solvents Transport Through Alkali-Treated Agro-waste Microfibre Incorporated with Low Density Polyethylene Composites

Obasi¹

2017

AJPST

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“…Since then, the use of hydrogels has extended to various applications. Due to their excellent hydrophilic properties, high swelling ratio and biocompatibility, hydrogels have been widely used in agriculture, in biomedicine as antibacterial materials, biosensors and in tissue engineering, in sorbents for the removal of heavy metals, and many other applications [2,3]. These materials have been also used in the development of the smart drug delivery systems.…”

Section: Introductionmentioning

confidence: 99%

New crosslinked hydrogels derivatives of 2-hydroxyethyl methacrylate: Synthesis, modifications and properties

Podko¹,

Bartnicki²,

Gawdzik³

2012

Express Polym. Lett.

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Abstract. This paper presents the synthesis, physicochemical properties and modifications of 2-hydroxyethyl methacrylate copolymers. It describes the new 2-hydroxyethyl methacrylate hydrogels in the form of microbeads of different degrees of crosslinking (2, 5, 8, 10, 15 and 20% mol). As crosslinking monomers bis[4(2-hydroxy-3-methacryloyloxypropoxy) phenyl]-sulfide and ethylene glycol dimethacrylate were used. The new hydrogels were obtained by two alternative methods in a suspension copolymerisation procedure. The copolymers were modified with diethylenetriamine in an epoxide opening reaction. Thermal properties (differential scanning calorimetry, thermogravimetric analysis) and swelling characteristic in typical solvents of the obtained functional hydrogels were examined. The chemical structure of the copolymers before and after modification was confirmed by Fourier transform infrared spectroscopy and elemental analyses. Moreover, their sorptive properties in removal of Cu(II), Zn(II), Cd(II), and Pb(II) ions from aqueous solutions were also presented. The Langmuir and Freundlich isotherm models are used to describe the adsorption characteristics of the selected modified hydrogels.

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“…HEMA (2-hydroxyethylmethacrylate) was the first monomer used to synthesize hydrogels for biomedical applications [8]. Its water swelling properties are improved by co-polymerization with more hydrophilic monomers [7,[9][10]. Hydrogels may be synthesized via various polymerization techniques, such as thermal polymerization [11], oxidation-reduction (redox) polymerization [12] and photopolymerization [13][14].…”

Section: Introductionmentioning

confidence: 99%

“…One major advantage of photopolymerization is that hydrogels can be synthesized in the presence of an active principle, facilitating the incorporation of drugs during the synthesis of the hydrogels. Photopolymerization has been employed to obtain hydrogels for drug delivery applications using a variety of mono functional monomers such as HEMA [7][8][9][10][11][12]15], and crosslinkers such as poly (ethylene glycol) dimethacrylate [16], and poly(ethylene glycol) diacrylate [17]. The co-polymerization of HEMA, acrylamide (AAm) and a suitable crosslinker provides a unique combination of properties of the resulting hydrogels, making them capable of swelling especially at high pH values [18][19].…”

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confidence: 99%

Influence of the ionic character of a drug on its release rate from hydrogels based on 2-hydroxyethylmethacrylate and acrylamide synthesized by photopolymerization

Gómez¹,

Williams²,

Montejano³

et al. 2012

Express Polym. Lett.

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Abstract. The influence of the ionic character of a specific drug on its release rate from a hydrogel based on 2-hydroxyethylmethacrylate (HEMA) and acrylamide (AAm) is analyzed. The hydrogel was synthesized by photopolymerization employing visible light, safranine O (Saf), as sensitizer, and a silsesquioxane functionalized with amine and methacrylate groups (SFMA), as co-initiator and crosslinker. Safranine O (Saf) was employed as a model of a cationic drug and the anionic form of resorufin (Rf) as a model of an anionic drug. Saf exhibited a larger affinity with functional groups of the hydrogel than that of Rf. This produced a lower loading and a faster release rate of Rf with respect to Saf. Besides, the release rate of Rf followed a Fickian behavior, while that of Saf exhibited a non-Fickian behavior. By hydrolyzing the hydrogel at pH = 13, amide groups supplied by AAm were irreversibly converted into carboxylic acid groups. Higher loadings and slower release rates of Saf from the hydrolyzed hydrogels were observed, making them particularly suitable for the slow drug-delivery of cationic drugs.

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Swelling behaviors, tensile properties and thermodynamic studies of water sorption of 2-hydroxyethyl methacrylate/epoxy methacrylate copolymeric hydrogels

Cited by 80 publications

References 31 publications

Organic Solvents Transport Through Alkali-Treated Agro-waste Microfibre Incorporated with Low Density Polyethylene Composites

Organic Solvents Transport Through Alkali-Treated Agro-waste Microfibre Incorporated with Low Density Polyethylene Composites

New crosslinked hydrogels derivatives of 2-hydroxyethyl methacrylate: Synthesis, modifications and properties

Influence of the ionic character of a drug on its release rate from hydrogels based on 2-hydroxyethylmethacrylate and acrylamide synthesized by photopolymerization

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