Characterization of Aloe vera-chitosan composite films and their use for reducing the disease caused by fungi in papaya Maradol

Four kinds of edible composite films based on chitosan combined with additional substances (konjac glucomannan, cassava starch, maltodextrin and gelatin) and the addition of lysozyme were prepared and used as packaging materials for Mongolian cheese. The prepared composite films were evaluated using scanning electron microscopy and Fourier transform infrared spectroscopy. The physicochemical properties of all chitosan composite films, including thickness, viscosity, opacity, color, moisture content, water vapor permeability, tensile strength and elongation at break, were measured. The results show that Konjac glucomannan–chitosan composite film presented the strongest mechanical property and highest transparency. The cassava starch–chitosan composite film presented the highest water barrier property. The study on the storage characteristics of Mongolian cheese was evaluated at 4 °C. The results show that the cheese packaging by cassava starch–chitosan composite film presented better treatment performance in maintaining the quality, reducing weight loss and delayering microbial growth.

Download Full-text

Characterization of Aloe vera-banana starch composite films reinforced with curcumin-loaded starch nanoparticles

Food Structure ◽

10.1016/j.foostr.2019.100131 ◽

2019 ◽

Vol 22 ◽

pp. 100131 ◽

Cited By ~ 7

Author(s):

Leonardo Nieto-Suaza ◽

Leonardo Acevedo-Guevara ◽

Leidy T. Sánchez ◽

Magda I. Pinzón ◽

Cristian C. Villa

Keyword(s):

Composite Films ◽

Aloe Vera ◽

Starch Nanoparticles

Download Full-text

Fabrication and characterization of kidney bean (Phaseolus vulgaris L.) protein isolate–chitosan composite films at acidic pH

Food Hydrocolloids ◽

10.1016/j.foodhyd.2012.10.007 ◽

2013 ◽

Vol 31 (2) ◽

pp. 237-247 ◽

Cited By ~ 28

Author(s):

Wen Ma ◽

Chuan-He Tang ◽

Xiao-Quan Yang ◽

Shou-Wei Yin

Keyword(s):

Phaseolus Vulgaris ◽

Composite Films ◽

Protein Isolate ◽

Kidney Bean ◽

Acidic Ph ◽

Phaseolus Vulgaris L ◽

L Protein ◽

Fabrication And Characterization ◽

Chitosan Composite

Download Full-text

KARAKTERISASI FILM KOMPOSIT ALGINAT DAN KITOSAN

REAKTOR ◽

10.14710/reaktor.14.2.158-164 ◽

2012 ◽

Vol 14 (2) ◽

pp. 158 ◽

Cited By ~ 2

Author(s):

Nur Rokhati ◽

Bambang Pramudono ◽

Nyoman Widiasa ◽

Heru Susanto

Keyword(s):

Composite Films ◽

Raw Material ◽

Layer By Layer ◽

Permeability Test ◽

Natural Polymers ◽

Layer Method ◽

Degree Of Swelling ◽

Chitosan Films ◽

Chitosan Composite

CHARACTERIZATION OF ALGINATE AND CHITOSAN COMPOSITE FILM. Due to the specific characteristics of (thin) films, the use of polymer films in various aplications has singnificantly increased. Alginate and chitosan are natural polymers, which have potential as a raw material for the manufacture of composite films. This paper presents the preparation and characterization of alginate, chitosan and chitosan-alginate composite films. The film characterization included permeability test, degree of swelling, mechanical property, morphology (by SEM), and surface chemistry (by FTIR). The results showed that alginate films have a higher permeability and degree of swelling (DS) than chitosan films. Both permeability and DS decreased with increasing concentration for both alginate and chitosan films. DS experiments showed that the films have the highest DS in water followed by ethanol 95% and ethanol >99.9%, respectively. The mechanical strength of chitosan films was larger than alginate films. Alginate-chitosan composite films prepared by layer by layer method showed better characteristics than the composite films prepared by blending of alginate and chitosan solutions. Meningkatnya aplikasi film polimer di berbagai industri tidak terlepas dari keunggulan yang dimiliki. Alginat dan kitosan merupakan polimer alam yang mempunyai potensi sebagai bahan dasar pembuatan film komposit. Pada penelitian ini dilakukan pembuatan dan karakterisasi film komposit berbasis alginat dan kitosan. Karakterisasi film yang dilakukan meliputi uji: permeabilitas, derajat swelling, mekanik, morfologi (dengan SEM), dan struktur kimia permukaan (dengan FTIR). Hasil penelitian menunjukkan bahwa film alginat mempunyai nilai permeabilitas maupun derajat swelling yang lebih tinggi dibanding dengan film kitosan. Baik pada kitosan maupun alginat memberikan fenomena bahwa semakin besar konsentrasi larutan maka semakin kecil nilai permeabilitas maupun derajat swelling, dengan derajat swelling terhadap air adalah yang paling besar kemudian diikuti oleh ethanol teknis (± 95%) dan yang terkecil adalah ethanol PA (> 99,9%). Kekuatan mekanik film kitosan lebih besar dibanding dengan film alginat. Film komposit alginat-kitosan yang dibuat dengan metode layer by layer memberikan karakteristik yang lebih baik dibanding dengan film komposit yang dibuat dengan pencampuran larutan alginat dan larutan kitosan.

Download Full-text

Synthesis and Characterization of Acetic Acid-Doped Polyaniline and Polyaniline–Chitosan Composite

Biomimetics ◽

10.3390/biomimetics4010015 ◽

2019 ◽

Vol 4 (1) ◽

pp. 15 ◽

Cited By ~ 8

Author(s):

Bianca Pasela ◽

Acelle Castillo ◽

Rhenish Simon ◽

Maria Pulido ◽

Haidee Mana-ay ◽

...

Keyword(s):

Acetic Acid ◽

Composite Films ◽

Cell Viability Assay ◽

Viability Assay ◽

Vis Spectroscopy ◽

Significant Difference ◽

Solution Casting Method ◽

Doped Polyaniline ◽

Chitosan Composite

Polyaniline–chitosan (PAni–Cs) composite films were synthesized using a solution casting method with varying PAni concentrations. Polyaniline powders used in the composite synthesis were polymerized using acetic acid as the dopant media. Raman spectroscopy revealed that the PAni powders synthesized using hydrochloric acid and acetic acid did not exhibit significant difference to the chemical features of PAni, implying that PAni was formed in varying concentrations of the dopant media. The presence of agglomerated particles on the surface of the Cs composite, which may have been due to the presence of PAni powders, was observed with scanning electron microscope–energy dispersive X-ray spectroscopy (SEM–EDX). Ultraviolet–visible (UV–Vis) spectroscopy further showed the interaction of PAni with Cs where the Cs characteristic peak shifted to a higher wavelength. Cell viability assay also revealed that the synthesized PAni–Cs composites were nontoxic and may be utilized for future biomedical applications.

Download Full-text