Synthesis and characterization of polypyrrole grafted chitin

Ramaprasad, A.T.; Latha, D.; Rao, Vijayalakshmi

doi:10.1016/j.jpcs.2017.01.017

Cited by 36 publications

(19 citation statements)

References 27 publications

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“…The values of transition and endothermic temperature and the transition changes are summarized in table 4. The transition temperature of three samples was little in comparison to values reported in literature [16][17] and the temperatures of Ch1 and Ch2 were similar between themselves. However, transition temperature of chitin increased 25-26 °C with the second treatment.…”

Section: Differential Thermal Analysissupporting

confidence: 72%

Extracción y caracterización de quitina de escamas de tilapia roja (oreochromis sp.) del Huila mediante métodos químicos

Gómez

Quintero

Salazar

2019

Rev. ing. univ. Medellín

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La quitina es el segundo biopolímero lineal más importante en el mundo. Avances recientes sugieren que la quitina se puede obtener de las escamas de peces. Para este artículo, se utilizaron tres tratamientos diferentes para obtener quitina de las escamas de tilapia roja (Orechromis sp.). Todas las muestras fueron insolubles en los solventes y ácidos usados; también presentaron diferentes porcentajes de carbono (3,27-55,80 %), oxígeno (22,09-42,51 %), nitrógeno (11,61-11,81 %), P (1,08-22,2 %), Ca (1,26-26,11 %), Na (0,53-1,02 %) y Mg (0,26-0,91 %). Las bandas de 3.340 cm-1 presentes en el espectro de infrarrojo corresponden al grupo hidroxilo de las bases de glucosamina poliméricas y los picos 1.415-1.456 cm-1 están relacionados con la banda N-H característica del grupo funcional amida. Las imágenes (SE) muestran diferentes dimensiones de partículas (0,1-30 μm) y las masas moleculares promedio, Mw, para Ch1, Ch2 y Ch3 fueron 1.064,28; 1.064,56; y 823,428, respectivamente, con una polidispersidad de 1,0074.

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Section: Differential Thermal Analysissupporting

confidence: 72%

Extracción y caracterización de quitina de escamas de tilapia roja (oreochromis sp.) del Huila mediante métodos químicos

Gómez

Quintero

Salazar

2019

Rev. ing. univ. Medellín

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“…[25][26][27] Improving the optical properties of biomaterials such as cellulose and polysaccharide is now the focus of attention due to its potential applications. A chitin nanocrystal conjugated with both uorescent dye and carbohydrate ligand has been developed for biorecognition applications.…”

Section: 22-24mentioning

confidence: 99%

Fluorescence control of chitin and chitosan fabricatedviasurface functionalization using direct oxidative polymerization

Hai

Sugimoto

2018

RSC Adv.

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The copolymer of 3-hexylthiophene (3HT) and fluorene (F) was directly grafted onto chitin and chitosan using FeCl 3 as an oxidant. The properties of the grafted chitin/chitosan were characterized by Fourier transform infrared (FT-IR) spectroscopy, UV-Vis spectroscopy, fluorescence spectroscopy, X-ray diffraction analysis, thermogravimetric analysis (TGA), transmission electron microscopy-energy dispersive X-ray spectroscopy, and quantum yield measurements. The UV-Vis absorption peaks of the chitin/chitosan grafted with 3-hexylthiophene and fluorene copolymer were increasingly blue-shifted upon increasing the fluorene content and the red-shifted emission of the grafted chitin/chitosan were controlled by varying the monomers feed of the 3HT/F units. The hypsochromic and bathochromic shifts of chitin/chitosan were ascribed to the (3HT/F) moieties grafted to their surface. The quantum yield of grafted chitin/chitosan increased upon increasing the fluorene content. The TGA and XRD analysis revealed that the thermal stability and crystallinity of chitin/chitosan decreased upon grafting the copolymer of fluorene and 3-hexylthiophene. This article represents a simple route towards the surface modification of chitin and chitosan using conducting copolymers, providing multicolor chitin and chitosan via a one-step reaction.

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“…The PPy morphology was strongly influenced by the experimental conditions. [13][14][15][16][17][18][19] Xia et al [13] used an oxidative polymerization method and reported that the PPy morphology changed from particle to nanofiber upon changing the β-naphthalene sulfuric acid concentration and polymerization temperature. Ammonium persulfate was used as oxidant.…”

Section: Resultsmentioning

confidence: 99%

“…The first one below 130 C is attributed to water loss and other volatiles. [17] The second one in the range of 130-265 C is attributed to the elimination of dopant anions from the PPy chains. [34] The third one above…”

Section: Macromolecular Symposiamentioning

confidence: 99%

Preparation and Characterization of Polymeric Microfibers of PLGA and PLGA/PPy Composite Fabricated by Solution Blow Spinning

Nahuis

Valente

Oliveira

et al. 2019

Macromolecular Symposia

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In this study, microfibers of poly(L‐lactic‐co‐glycolic acid) (PLGA) and PLGA/polypyrrole (PPy) composite (90/10 wt%) are produced by using the solution blow spinning (SBS) technique. PPy is synthesized by the oxidative polymerization method using p‐toluenesulfonic acid (p‐TSA) as the dopant and FeCl3 as the oxidant. The prepared PPy showed microfibers with globular particles morphology. Mixtures of porous and nonporous microfibers and microfibers incorporated with PPy are obtained. A wettability test shows that the PLGA and PLGA/PPy fibrous mats are hydrophobic. The electrical conductivity of the PLGA/PPy composite is of the same order as that of pure PLGA (≈10−10 S cm−1), indicating that the electrical percolation threshold is not reached for PPy loading of 10 wt%. The incorporation of PPy into PLGA microfibers improved the thermal stability of the composite and also increases the PLGA crystalline phase.

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Synthesis and characterization of polypyrrole grafted chitin

Cited by 36 publications

References 27 publications

Extracción y caracterización de quitina de escamas de tilapia roja (oreochromis sp.) del Huila mediante métodos químicos

Extracción y caracterización de quitina de escamas de tilapia roja (oreochromis sp.) del Huila mediante métodos químicos

Fluorescence control of chitin and chitosan fabricatedviasurface functionalization using direct oxidative polymerization

Preparation and Characterization of Polymeric Microfibers of PLGA and PLGA/PPy Composite Fabricated by Solution Blow Spinning

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