نتایج جستجو برای: water vapor permeability
تعداد نتایج: 617569 فیلتر نتایج به سال:
Abstract Curing is a crucial process during the construction phase of concrete structures, as it plays significant role in ensuring durability and strength. During curing process, kept moist to allow properly hydration hardening. This helps prevent cracking, increase concrete's compressive strength, improve its resistance weathering, abrasion, other forms wear. Therefore, essential that carried...
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...
Background and Objectives: Cold plasma is an eco-friendly and non-thermal technique, which has become an important technology to change the physical and chemical features of polymers. Recently, cold plasma has been considered in the decontamination and modification of packaging materials in the food industry. Therefore, the objective of this study was to survey the effect of using low-pressure ...
Chitosan films with olive leaf extract (OLE) incorporated at different concentrations were characterized regarding their antimicrobial, antioxidant and some relevant physical properties (i.e., solubility, water vapor permeability, tensile properties). Results indicate that the active have substantial antimicrobial activity against Listeria monocytogenes Campylobacter jejuni mostly extending mic...
UNLABELLED Chitosan is a biopolymer obtained by N-deacetylation of chitin, produced from shellfish waste, which may be employed to elaborate edible films or coatings to enhance shelf life of food products. This study was conducted to evaluate the effect of different concentrations of nanofiller (cellulose nanofibers, CNF) and plasticizer (glycerol) on tensile properties (tensile strength-TS, el...
In this study, water vapour permeability, wrinkle recovery, UV protection and contact angle properties of ion implanted Polyester (PES) fabrics were investigated. order to achieve goal; our Metal Vapor Vacuum Arc (MEVVA) source Pb, Ag, Ag+N, Ti+O Cr+O the PES with 5x1016 ion/cm2 30 kV acceleration voltage. The test results compared unimplanted fabric. indicated that Protection values increased ...
Vacuum and temperature effects on moisture content, water vapor permeability (WVP), color (L, a, b, and DE), tensile strength (TS), elongation (E), and total soluble matter (TSM) of soy protein isolate (SPI) films were examined. SPI films were cured at 60, 72.5, or 85 °C and at 101.3, 81.32, or 61.32 kPa for 24 h. As a result of heat-curing moisture content, WVP, E, and TSM decreased, and total...
−− A mathematical model was developed to describe mass transport in polymeric films based on modifications of Fick’s law in a continuous macroscopic approach. The purpose of this work was specifically to model the transport of water vapor and oxygen in polymeric films at the pore level, based on physical aspects of the condensation process and the morphology and connectivity of the porous mediu...
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