Chitosan-Cloisite Clay Bionanocomposites

Çankaya, Nevin; Sökmen, Özlem

doi:10.12739/nwsa.2016.1a26pb

Cited by 2 publications

(3 citation statements)

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“…The process of removing acetyl groups in the chitin polysaccharide chain is called deacetylation. Chitin, which usually has a degree of deacetylation greater than 50%, is considered to be chitosan [7,8]. The molecular weight of chitosan varies depending on the conditions applied during the deacetylation process and the source from which it is obtained.…”

Section: Physical and Chemical Properties Of Chitosanmentioning

confidence: 99%

Chitosan-Based Nanocomposites for Biological Applications

Yalçın¹,

Çankaya²

2022

Nanoclay - Recent Advances, New Perspectives and Applications

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Chitosan is an important natural cationic polymer. Chitosan is produced as a deacetylated form of chitin, and its excellent biocompatible, biodegradable, nontoxic, natural chemical, and thermal stability properties have led to its common use in especially biomedical applications. The combination of nanomaterials and chitosan has been considered an excellent approach to overcoming the handicaps associated with biopolymer. The chitosan-based nanocomposites are potentially efficient in a number of areas including medical fields. Chitosan is biodegradable, biocompatible, basic, nontoxic, and also approved by GRAS (Generally recognized as safe by the United States Food and Drug Administration [US FDA]). Chitosan-based nanocomposites have different applications in drug delivery including ocular, per-oral, pulmonary, nasal mucosal, gene, buccal drug, vaccine, vaginal, and cancer therapy. Chitosan has low toxicity in both in vitro and in vivo models. In this chapter, we discussed the preparation techniques and various forms of chitosan materials in biomedical applications. In addition, this chapter explores recent research on chitosan-based nanocomposites for medical studies.

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Section: Physical and Chemical Properties Of Chitosanmentioning

confidence: 99%

Chitosan-Based Nanocomposites for Biological Applications

Yalçın¹,

Çankaya²

2022

Nanoclay - Recent Advances, New Perspectives and Applications

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show abstract

“…Chitosan is a natural polymer with excellent properties such as biodegradability, biocompatibility and bioadhesive properties [6,8]. Chitosan is nontoxic so it is frequently used in medical applications and pharmaceutical industry.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, clay layers are modified with hydrophobic agents to allow the clay layers to be more compatible with hydrophobic polymers. The method used to modify smectites is based on cation exchange with alkylammonium ion and the resulting material is called as organoclays [8]. The most important application of organoclays is to prepare different types of nanocomposites.…”

Section: Introductionmentioning

confidence: 99%

Kil/Organokil-Kitosan ve Kil/Organokil-Trietil Kitosan Nanokompozit Sentezi ve Karakterizasyonu

Çelebi

Yıldız

2022

Politeknik Dergisi

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Bu çalışmada montmorillonite (Mt) kili kullanılarak kil-kitosan, organokil-kitosan, kil-trietil kitosan ve organokil-trietil kitosan nanokompozitleri sentezlenmiş ve karakterizasyonları yapılmıştır. Organokil elde etmek için kil yüzeyi uzun zincirli (setil trimetil amonyum bromür (CTAB)), kısa zincirli (tetrametil amonyum bromür (TEAB)), ve halkalı (benzil trietil amonyum bromür (BTEAB)) yüzey aktif maddeleri ile modifiye edilmiştir. Organokiller CTAB-O (setil trimetil amonyum bromür ile modifiye edilmiş kil), BTEAB-O (benzil trietil amonyum bromür ile modifiye edilmiş kil) ve TEAB-O (tetrametil amonyum bromür ile modifiye edilmiş kil) olarak gösterilmiştir. Nanokompozitlerin yapısal ve termal özellikleri X ışını kırınım difraktometresi (XRD), transmisyon elektron mikroskobu (TEM) ve termogravimetrik analiz (TGA) ile incelenmiştir. XRD ve TEM sonuçları, kil-kitosan kompozitleri ve düşük miktarda CTAB-O, TEAB-O and BTEAB-O organokili içeren organokil-kitosan kompozitleri için dağılmış tabakalı (exfoliation) yapı elde edildiğini göstermiştir. Trietil kitosan kompozitlerinde (kil-TEC, organokil-TEC) ise bütün kil ve organo kil miktarları (%2.5, %5, %10) trietil kitosan içinde dağılarak, dağılmış tabakalı (exfoliated) kompozit yapı oluşturmuştur. %50 kütle kaybındaki termal bozunma sıcaklığı tek başına kitosan için 350 °C civarında iken, 10% kil-kitosan and bazı organokil-kitosan kompozitleri (5% and 10% TEAB-O-kitosan; 10% BTEAB-O-kitosan) için 375 °C civarına kadar artmıştır. Ayrıca, trietil kitosan kompozitlerinde (kil-TEC, organokil-TEC) termal bozunma sıcaklığı, kitosan kompozitlerine (kil-kitosan, organokil-kitosan) göre önemli ölçüde artmıştır. En yüksek termal bozunma sıcaklığına (965-968 ˚C), %50 kütle kaybında kil-TEC (%2.5 ve %10), CTAB-O-TEC (%5) ve BTEAB-O-TEC (5% ve %10) kompozitleri için ulaşılmıştır.

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Chitosan-Cloisite Clay Bionanocomposites

Cited by 2 publications

References 0 publications

Chitosan-Based Nanocomposites for Biological Applications

Chitosan-Based Nanocomposites for Biological Applications

Kil/Organokil-Kitosan ve Kil/Organokil-Trietil Kitosan Nanokompozit Sentezi ve Karakterizasyonu

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