نتایج جستجو برای: water vapor permeability and tensile strength were determinedalso

تعداد نتایج: 16989607  

Journal: :journal of chemical health risks 0
m. rojhan biopolymer research group, food science and technology division, agriculture department, damghan branch, islamic azad university, damghan, semnan, iran l. nouri biopolymer research group, food science and technology division, agriculture department, damghan branch, islamic azad university, damghan, semnan, iran

starch is found in abundance in nature and it is one of the raw materials used for food packaging because of the low price, biodegradability, good mechanical and barrier properties. the recycling ability of coating materials was significantly increased by using edible films and coating in comparison to traditional packaging and it could be an alternative for synthetic films. in this research, t...

Journal: :جنگل و فرآورده های چوب 0
علی عبدالخانی استادیار گروه علوم و صنایع چوب و کاغذ، دانشکدة منابع طبیعی، دانشگاه تهران، کرج، ایران جابر حسین زاده دانشجوی کارشناسی ارشد، گروه علوم و صنایع چوب و کاغذ، دانشکدة منابع طبیعی، دانشگاه تهران، کرج، ایران سحاب حجازی استادیار گروه علوم و صنایع چوب و کاغذ، دانشکدة منابع طبیعی، دانشگاه تهران، کرج، ایران

polylactic acid based biodegradable nanocomposites reinforced with acetylated nanocellulose were fabricated with solution casting procedure. the nanocomposites were prepared by adding 1, 3 and 5% nanofiber loadings. the microstructure, physical, mechanical and thermal properties of the prepared nanocomposites were investigated. scanning electronic microscope (sem) analysis of the composites con...

2014
Gholamreza Kavoosi Seyed Mohammad Mahdi Dadfar Seyed Mohammad Ali Dadfar Farhad Ahmadi Mehrdad Niakosari

Gelatin composite films were prepared from gelatin solutions (10% w/v) containing multi-walled carbon nanotubes (MWCNT, 0.5, 1, 1.5, and 2% w/w gelatin) as nanofiller. The water solubility, water swelling, water uptake, water vapor permeability (WVP), mechanical, and antibacterial properties of the films were examined. Water solubility, water swelling, water uptake, and WVP for gelatin films we...

Journal: :جنگل و فرآورده های چوب 0
علی عبدالخانی دانشیار، گروه علوم و صنایع چوب و کاغذ، دانشکده منابع طبیعی دانشگاه تهران، کرج، ایران ابراهیم حجتی مروست کارشناس ارشد، گروه علوم و صنایع چوب و کاغذ، دانشکده منابع طبیعی دانشگاه تهران، کرج، ایران علی نقی کریمی استاد، گروه علوم و صنایع چوب و کاغذ، دانشکده منابع طبیعی دانشگاه تهران، کرج، ایران؛ و مؤسسه تحقیقاتی introp، دانشگاه پوترا، پوترا، مالزی سهیلا ایزدیار استادیار، گروه علوم و صنایع چوب و کاغذ، دانشکده منابع طبیعی دانشگاه تهران، کرج، ایران

in this research, cellulose-silk composites production in liquid phase was studied. in this respect,bmimcl ionic liquid was synthesized in the laboratory and was used for dissolution purpose. afterdissolution of the biopolymers and mixing them in the liquid phase, obtained suspension was spread ina petri dish. then, the composite gel was washed with running methanol to remove the il, cellulosea...

Journal: :مهندسی بیوسیستم ایران 0
فرزانه کوراوند دانشجوی کارشناسی ارشد، گروه صنایع غذایی، دانشکده علوم دامی و صنایع غذایی، دانشگاه کشاورزی و منابع طبیعی رامین خوزستان حسین جوینده عضو هیات علمی گروه علوم و صنایع غذایی، دانشکده علوم دامی و صنایع غذایی، دانشگاه کشاورزی و منابع طبیعی رامین خوزستان حسن برزگر عضو هیات علمی گروه علوم و صنایع غذایی، دانشکده علوم دامی و صنایع غذایی، دانشگاه کشاورزی و منابع طبیعی رامین خوزستان محمد حجتی عضو هیات علمی گروه علوم و صنایع غذایی، دانشکده علوم دامی و صنایع غذایی، دانشگاه کشاورزی و منابع طبیعی رامین خوزستان

the effect of enzymatic treatment time of microbial transglutaminase (mtgase) on the characteristics of whey protein isolate (wpi) films was investigated. results shown that the properties of mtgase-treated films were affected by increasing the enzymatic treatment time. enzymatic treatment at lower incubation time, i.e. for 1 h, significantly resulted in higher values of tensile strength (ts) a...

In this study, biodegradable kefiran-chitosan-nanocellulose blend films were developed and their physical, mechanical, barrier, thermal and structural properties determined. Results showed that adding nanocellulose had not any significant effect on the thickness, moisture content and water solubility. Also, water vapor permeability, tensile strength and lightness increased and the elongation at...

Journal: :علوم و تکنولوژی پلیمر 0
هادی الماسی بابک قنبرزاده علی اکبر انتظامی

novel citric acid modified starch-carboxy methyl cellulose (cmc) -montmorillonite (mmt) bionanocomposite films were prepared by casting method and the effect of mmt on the structural and physical properties of the starch-cmc biocomposites was studied. x-ray diffraction test showed thatstrong polar interactions between the hydroxyl groups present in the starch and cmc chains and in the silicate ...

Journal: :Journal of food science 2009
Henriette M C Azeredo Luiz Henrique C Mattoso Delilah Wood Tina G Williams Roberto J Avena-Bustillos Tara H McHugh

Cellulose nanoreinforcements have been used to improve mechanical and barrier properties of biopolymers, whose performance is usually poor when compared to those of synthetic polymers. Nanocomposite edible films have been developed by adding cellulose nanofibers (CNF) in different concentrations (up to 36 g/100 g) as nanoreinforcement to mango puree based edible films. The effect of CNF was stu...

Journal: :journal of agricultural science and technology 2010
s. saremnezhad m. h. azizi m. barzegar s. abbasi e. ahmadi

there has been a renewed interest in edible films made of renewable and natural polymers such as protein, polysaccharide and lipids. natural polymers derived from natural sources like food protein, offer the greatest opportunities because of their biodegradability and their ability to supplement nutritional value of foods. faba bean is a valuable source of protein and is cultivated in large qua...

Journal: :پژوهش های علوم و صنایع غذایی ایران 0
h. baghaei f. aghaei n. sedaghat m. mohebbi

in view of the importance environmental pollution caused by plastic food packaging, in recent years there is a considerable interest in edible films and coating based on polysaccharides, proteins, lipids or combination of them. edible coatings also serve as carriers of food additives such as anti-browning and antimicrobials agents, colorants, flavor, nutrients and spices, so act as active packa...

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