One Pot Synthesis and Characterization of Alginate Stabilized Semiconductor Nanoparticles

Parani, Sundarrajan; Prabakaran, E.; Marimuthu, Alexander; Subhadra, Lakshmi Baddireddi; Pandian, K.

doi:10.5012/bkcs.2012.33.10.3218

Cited by 145 publications

(47 citation statements)

References 39 publications

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“…These interactions cause a disorganization in the polymer structure, resulting in an amorphous phase and in the absence of the peak at 22° in the cross‐linked samples . With the addition of microparticles to the hydrogel, the crystallinity of the material probably diminished, which is indicated by the decreased intensity of the peak . The presence of neomycin sulphate or propolis could not be noted in the XRD profiles of the samples, probably due to low amounts of the added materials .…”

Section: Resultsmentioning

confidence: 99%

“…Sodium alginate is an amorphous material that shows narrow diffraction peaks at 13° and 22° and a shoulder at 40° . The diffraction peak at 13° is relative to the reflection of the polyguluronate unit of alginate, the peak at 22° is relative to the reflection of the polymannuronate unit, while the shoulder at 40° shows an amorphous halo . The profile of the samples changed when compared with sodium alginate powder.…”

Section: Resultsmentioning

confidence: 99%

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Alginate hydrogels incorporating neomycin or propolis as potential dressings for diabetic ulcers: Structure, swelling, and antimicrobial barrier properties

Candido

Conceição

Moreira

et al. 2019

Polymers for Advanced Techs

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Alginate hydrogels have many attractive characteristics for potential use as wound dressing materials. However, they are not considered to possess any intrinsic activity against microbial infection, often present in neuropathic wounds. To overcome this, the effect of incorporating neomycin or propolis in alginate hydrogels was investigated, both by direct blending alone and also by further addition of loaded alginate microparticles prepared by the extrusion dripping method. The morphological, microstructural, thermal, mechanical, and swelling properties of each film were evaluated, as well as particle size distribution and antimicrobial penetration analysis. Microparticle size was considered suitable for drug delivery applications and incorporation in hydrogel films. The presence of neomycin and propolis, in both blended and microparticle form, interfered with film properties leading to hydrogels with different characteristics. All samples showed swelling degrees up to 100% and mechanical and thermal properties suitable for application as wound dressings. In addition, all samples acted as barriers to microbial penetration.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Alginate hydrogels incorporating neomycin or propolis as potential dressings for diabetic ulcers: Structure, swelling, and antimicrobial barrier properties

Candido

Conceição

Moreira

et al. 2019

Polymers for Advanced Techs

View full text Add to dashboard Cite

show abstract

“…Chitosan has been reported to have diffraction peaks at *10°and *20°2h [23]. Collagen, a major constituent of ECM, shows a broad diffraction pattern at 10°2h along with a characteristic peak at 23°2h [24]. The typical peaks (12°2h and 21°2h) of chitosan were noticed in the composite films.…”

Section: Molecular Interaction Studiesmentioning

confidence: 92%

Evaluation extracellular matrix–chitosan composite films for wound healing application

Asthana

Goyal

Dhar

et al. 2015

J Mater Sci: Mater Med

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The present study describes the preparation of extracellular matrix (ECM; from porcine omentum) based chitosan composite films for wound dressing applications. The films were prepared by varying the ECM content, whereas, the amount of chitosan was kept constant. The interactions amongst the components of the films were analyzed by FTIR and XRD studies. The films were thoroughly characterized for surface hydrophilicity, moisture retention capability, water vapor permeability, mechanical and biocompatibility. FTIR study indicated that both chitosan and ECM were present in their native form and did not lose their activity. XRD analysis suggested composition dependent change in the crystallinity of the films. The mechanical properties suggested that the composite films had sufficient properties to be used for wound dressing applications. An increase in the ECM content resulted in better hydrophilicity of the films and hence better the moisture retention capacity and retardant water vapor transmission rate property of the composite films. The films were found to be biocompatible to both blood and adipose tissue derived stem cells. In gist, the prepared films may be explored as wound dressing materials.

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“…O plano cristalino de difração para o bloco M é referente ao plano (200) e para o bloco G o plano é (110). 27,28 Com relação ao hidrogel de alginato de cálcio observam-se 2 alargamentos. O primeiro encontra se na região de 13,92° em 2θ e o outro na região de 21,22°.…”

Section: Difração De Raios-xunclassified

Otimização da síntese de hidrogéis nanocompósitos intercalados para possível aplicação na área médica

Fernandes¹,

Moura²,

Aouada³

2016

Quim. Nova

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. In this study, the hydrogel formulations based on polysaccharide sodium alginate were investigated for further development of intercalated nanocomposite hydrogels, for purposes of future applications in the areas of health as a carrier in drug delivery systems. Thus, the objective of the work dealt with in the optimization of hydrogels synthesis and obtaining nanostructured hydrogels with clay in an intercalated conformation. The optimization of the hydrogel synthesis was successful, and it is possible to define the materials and / or solutions to be used and concentrations of these solutions to the best formulations of hydrogels. The choice of the concentration of the polysaccharide, the type of crosslinking agent and nanofiller to continued development work, it was determined following criteria as the degree of swelling, and in some cases the physical properties, contributed to determine the best hydrogels. The development of intercalated nanocomposites hydrogel beads was confirmed by the X-ray diffraction technique, which thus could be used to observe evidence of effective incorporation or intercalation of the nanoclay in the hydrogel matrix.Keywords: hydrogels; nanocomposites; sodium alginate; nanofillers; intercalation. INTRODUÇÃOTendo em vista a necessidade de equipamentos sofisticados na área biomédica, os que são disponibilizados para utilização apresentam alto custo, sendo este um impasse no que diz respeito à aquisição. Deste modo, os biomateriais surgem como uma opção interessante, já que desde a última década vem se estudando e trabalhando com este tipo de material, principalmente na área médica. Existem diferentes maneiras de se definir o termo biomateriais. Dentre essas, os biomateriais são definidos como materiais utilizados na substituição de algum órgão vital que perdeu sua atividade no organismo. Atualmente o campo de aplicação engloba desde as próteses até a utilização para regeneração óssea. 1 Dentro da classe dos biomateriais, existem os polímeros, que são macromoléculas que se permitem serem moldadas de acordo com a área a ser empregada. 2 A utilização de polímeros está em ascendência, e se mostra altamente proveitoso na biomedicina principalmente quando se trata de polímeros naturais. A motivação está fundamentada nas propriedades como biodegradabilidade e biocompatibilidade. Dessa maneira, o alginato de sódio (sendo um polímero natural), em razão das propriedades já mencionadas e pelo fato de ser atóxico, termoestável e de baixo custo, vem recebendo grande atenção para tal finalidade. 3 O alginato de sódio é um polissacarídeo obtido por meio da extração de algas marrons (Phaeophyceae). As cadeias macromoleculares são lineares com segmento rígidos e flexíveis. 4 O segmento rígido é atribuído aos blocos G formado pelo monossacarídeo ácido α-L-gulurônico e o segmento flexível está associado aos blocos M que são constituídos de unidades monossacarídicas de ácido β-D-manurônico. 4 O alginato de sódio pode apresentar cadeias com apenas blocos M ou apenas blocos G, ou pode ser constituída por ...

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One Pot Synthesis and Characterization of Alginate Stabilized Semiconductor Nanoparticles

Cited by 145 publications

References 39 publications

Alginate hydrogels incorporating neomycin or propolis as potential dressings for diabetic ulcers: Structure, swelling, and antimicrobial barrier properties

Alginate hydrogels incorporating neomycin or propolis as potential dressings for diabetic ulcers: Structure, swelling, and antimicrobial barrier properties

Evaluation extracellular matrix–chitosan composite films for wound healing application

Otimização da síntese de hidrogéis nanocompósitos intercalados para possível aplicação na área médica

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