scholarly journals Investigation and modeling of moisture sorption behaviour of rice starch/carboxymethyl chitosan blend films

2015 ◽  
Vol 87 ◽  
pp. 012080 ◽  
Author(s):  
R Suriyatem ◽  
C Rachtanapun ◽  
P Raviyan ◽  
P Intipunya ◽  
P Rachtanapun
Keyword(s):  
Moisture Sorption ◽  
Carboxymethyl Chitosan ◽  
Rice Starch ◽  
Sorption Behaviour ◽  
Blend Films

Prediction Modeling for Moisture Sorption Isotherms of Rice Starch/Carboxymethyl Cellulose from Durian Rind Blend Films

2013 ◽  
Vol 431 ◽  
pp. 32-36 ◽  
Author(s):  
Rungsiri Suriyatem ◽  
Pornchai Rachtanapun
Keyword(s):  
Sorption Isotherm ◽  
Carboxymethyl Cellulose ◽  
Sorption Isotherms ◽  
Moisture Sorption ◽  
Rice Starch ◽  
Percentage Error ◽  
Blend Films ◽  
Moisture Sorption Isotherm ◽  
Moisture Sorption Isotherms ◽  
Durian Rind

Rice starch/carboxymethyl cellulose from durian rind (RS/CMCd) blend films were prepared by solution casting. The effect of different ratios between rice starch and CMCd (100:0, 88:12, 67:33, 50:50, 33:67, 12:88 and 0:100) on moisture sorption isotherm of blend films was investigated. The sorption isotherm of RS/CMCd blend films was determined at various relative humidity (RH) at 25°C. The isotherm curves revealed that the highest equilibrium moisture content (EMC) was obtained from CMCd film, at aw=85. Knowledge of sorption isotherms is important to predict the moisture sorption properties of the filmsviamoisture sorption empirical models. The Lewicki, Peleg, Guggenheim-Anderson-deBoer (GAB), BrunauerEmmettTeller (BET), and Oswin models were tested to fit the experimental data. The root mean squares percentage error (%RMS) of Lewicki, Peleg, GAB, BET and Oswin was in the range of 5.3-83.1, 2.2-20.0, 6.9-20.2, 3.4-26.4 and 4.7-41.2, respectively. The Peleg model was found to be the best fitted model for RS/CMCd blend films.

Prediction Models for Moisture Sorption Isotherms of Soy Protein Isolate/Carboxymethyl Chitosan/Oleic Acid Blend Films

2012 ◽  
Vol 506 ◽  
pp. 595-598
Author(s):  
Pornchai Rachtanapun ◽  
R. Suriyatem
Keyword(s):  
Oleic Acid ◽  
Soy Protein ◽  
Acid Content ◽  
Soy Protein Isolate ◽  
Sorption Isotherms ◽  
Moisture Sorption ◽  
Protein Isolate ◽  
Carboxymethyl Chitosan ◽  
Oleic Acid Content ◽  
Blend Films

Soy protein isolate/carboxymethyl chitosan/oleic acid (SPI/CMCH/O) blend films were prepared by solution casting. The effect of various oleic acid content (0, 2.5, 5.0, 10.0, 20.0 pph of SPI and CMCH) on water sorption isotherm of SPI/CMCH base film was investigated. The sorption isotherm of SPI/CMCH/O blend films was evaluated at serveral relative humidity (0, 16, 35, 55 and 76% RH), at 25±1°C. The isotherms showed equilibrium moisture content (%EMC) of SPI/CMCH/O blend films decreased when oleic acid content increased. Understanding of sorption isotherms is an importance for prediction of moisture sorption properties of films via moisture sorption empirical models. Guggenheim-Anderson-de Boer (GAB), BrunauerEmmettTeller (BET) and Oswin sorption models were tested to fit the experimental data. The root mean squares (RMS) of GAB, BET and Oswin were in the range of 68.60-87.02, 22.86-79.38 and 694.78-3797.23, respectively. BET model was found to be the better-fitted model for SPI/CMCH/O blend films at 25±1°C.

scholarly journals Moisture Sorption Behaviour and Mould Ecology of Trade Garri Sold in South Eastern Nigeria

2014 ◽  
Vol 2014 ◽  
pp. 1-10 ◽  
Author(s):  
Tochukwu Samuel ◽  
J. Obeta Ugwuanyi
Keyword(s):  
Moisture Content ◽  
Water Activity ◽  
Central Africa ◽  
Sorption Isotherms ◽  
Moisture Sorption ◽  
Fungal Species ◽  
Temperature Dependent ◽  
Sorption Behaviour ◽  
Moisture Sorption Isotherms ◽  
West And Central Africa

Garri is a creamy white or yellow starchy grit produced by roasting to gelatinization and dryness of peeled, washed, mashed, and fermented dewatered cassava roots. It is the most important product of cassava in West and Central Africa. Mean moisture content of yellow and white garri was 11.11% and 10.81% within 24 hrs of sampling from the market, increasing to 17.27% and 16.14%, respectively, following 3 months of storage at room temperature. The water activity of samples varied from initial 0.587 to 0.934 following storage. Moisture sorption isotherms, determined by static gravimetric techniques at 20° and 30°C, showed temperature dependent BET Sigmoidal type II behaviour typical of carbohydrate rich foods but modulated very slightly by the content of palm oil. Equilibrium moisture content decreased with increase in temperature at constant water activity. A total of 10 fungal species belonging to the generaMucor,Penicillium,Cephalosporium,Aspergillus,Scopulariopsis,Rhizopus, and Paecilomyceswere identified, with range increasing with water activity of samples.

Preparation and Properties of Sodium Carboxymethyl Cellulose-Hyaluronic Acid-Carboxymethyl Chitosan Blend

2010 ◽  
Vol 20-23 ◽  
pp. 1157-1161 ◽  
Author(s):  
Xi Hong Zhao ◽  
Xiao Wei He ◽  
Shi Qi Xie ◽  
Lian Sheng Yang
Keyword(s):  
Hyaluronic Acid ◽  
Water Absorption ◽  
Molecular Interaction ◽  
Carboxymethyl Cellulose ◽  
Solution Method ◽  
Carboxymethyl Chitosan ◽  
Sodium Carboxymethyl Cellulose ◽  
Blend Films ◽  
Ft Ir ◽  
Controllable Degradation

The Sodium carboxymethyl cellulose (CMC)-Hyaluronic acid (HA)-Carboxymethyl chitosan (CMCS) blend films were prepared by solution method, and then characterized by FT-IR,XRD,SEM and water absorption capability. The results suggested that there were strong molecular interaction and good compatibility in the blend films. The blend films are expected to be used as controllable degradation biomaterials in the field of postsurgical hemostasis and anti-adhesion.

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