Alteração do caráter hidrofílico de filmes de quitosana por tratamento de plasma de HMDS

Assis, O. B. G.

doi:10.1590/s0100-40422010000300022

Cited by 13 publications

(8 citation statements)

References 15 publications

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“…The wettability is a phenomenon resulting from the molecular interactions between two fluids 14 . Thus, the existence of polar and non-polar groups on the surface directly influences the wettability property 7 . The Figure 1 shows the wettability behavior for PPure films as well as for P1V, P3V, and P6V films that were treated through C 1 .…”

Section: Contact Anglementioning

confidence: 99%

Investigation of the Wettability Using Contact Angle Measurements of Green Polyethylene Flat Films and Expanded Vermiculite Clay Treated by Plasma

et al. 2019

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Polyethylene (PE) is a polymer that has a low adhesion property, which is related to its low surface energy. However, the plasma treatment aims the modification of the surface properties without affecting the polymer structure. In this sense, the objective of this work was to prepare biocomposite films via flat extrusion with Green PE matrix and Expanded Vermiculite Clay (VMT), contents of 1, 3 and 6%. The films were treated by plasma in two different ways: Oxygen (O 2) atmosphere (Condition 1); and Argon/Hydrogen (Ar/H 2) atmosphere followed by a plasma treatment under O 2 atmosphere (Condition 2). The results of the contact angle measurements indicated that the incorporation of VMT and the conditions used for plasma treatment increased the films wettability due to the hydrophilic character of VMT and also as a consequence of the plasma. In contrast, the XRD diffractograms indicated that there were no significant changes in the films structure.

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Section: Contact Anglementioning

confidence: 99%

Investigation of the Wettability Using Contact Angle Measurements of Green Polyethylene Flat Films and Expanded Vermiculite Clay Treated by Plasma

et al. 2019

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“…Dne of the materials still unexplored in Brazil as a component of fruit biofilms is chitosan, although some national and international research work has shown that it can be very advantageous in the development of new materials for use in technological and biomedical applications (Laranjeira & Fávere, 2009;Assis, 2010). Chitosan is the second most abundant polysaccharide available in nature and can be obtained from the deacetylation reaction of chitin (Aider, 2010).…”

Section: Introductionmentioning

confidence: 99%

Impact of edible coatings based on cassava starch and chitosan on the post-harvest shelf life of mango (Mangifera indica) ‘Tommy Atkins’ fruits

et al. 2018

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“…Swelling capacity is one of the most important features to application in polymeric drug delivery systems because it exerts an important effect on the release kinetics of drug incorporated in the films. Furthermore, it is directly related with mucoadhesivity, since the bioadhesive sites in the polymers chain are exposed during the swelling process when the absorption of the medium by the polymers happens [46].…”

Section: Film Propertiesmentioning

confidence: 99%

Manufacture and Characterization of Mucoadhesive Buccal Films Based on Pectin and Gellan Gum Containing Triamcinolone Acetonide

Fernandes

Fortes

Fonseca

et al. 2018

International Journal of Polymer Science

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The treatment of canker sores can be quite compromised by the short period of the drug in the place of action. In this context, there is a need to develop drug dosage forms that allow more contact with the oral mucosa providing prolonged drug release. Therefore, the aim of this work was to obtain and characterize buccal films based on pectin and gellan gum in order to evaluate the potential use of these natural polymers in the production of pharmaceutical dosage forms for controlled release of TA in the oral mucosa. Using a 23 full factorial design, eight formulations were prepared by solvent casting method. The raw materials and films were characterized using techniques such as FTIR, DSC, and TG. In addition, thickness, mechanical properties, mucoadhesive strength, swelling, drug content, and dissolution profile of the films were evaluated. The results of FTIR, DSC, and TG showed that new chemical species are not formed in the production of films, and that these dosage forms have an adequate thermal behavior. All formulation showed a high degree of swelling, good mechanical resistance and elasticity, and a good mucoadhesive strength as well as able to act as a controlled release system.

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Alteração do caráter hidrofílico de filmes de quitosana por tratamento de plasma de HMDS

Cited by 13 publications

References 15 publications

Investigation of the Wettability Using Contact Angle Measurements of Green Polyethylene Flat Films and Expanded Vermiculite Clay Treated by Plasma

Investigation of the Wettability Using Contact Angle Measurements of Green Polyethylene Flat Films and Expanded Vermiculite Clay Treated by Plasma

Impact of edible coatings based on cassava starch and chitosan on the post-harvest shelf life of mango (Mangifera indica) ‘Tommy Atkins’ fruits

Manufacture and Characterization of Mucoadhesive Buccal Films Based on Pectin and Gellan Gum Containing Triamcinolone Acetonide

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