We have generated closed-cell microcellular foams from gliadin, an abundantly available wheat storage protein. The extraction procedure of gliadin from wheat gluten, which involves only the natural solvents water and ethanol, respectively, is described with emphasis on the precipitation step of gliadin which results in a fine dispersion of mostly spherical, submicron gliadin particles composed ...

open-celled foams are capable to allow the passage of fluids through their structure, because of interconnections between the open cells or bubbles and therefore these structures can be used as a membrane and filter. in thiswork, we have studied the production of polystyrene open-celled microcellular foam by using co2 as blowing agent. to achieve such structures, it is necessary to control the ...

Abstract In this paper, silicone rubber materials with foam/solid alternating multilayered structures were successfully constructed by combining the two methods of hot-pressing and supercritical carbon dioxide (SCCO 2 ) foaming. The cellular morphology mechanical properties systematically studied. results show that growth cell was restrained solid layer, resulting in a decrease size. addition, ...

Abstract Foamed materials play an important role in a lightweight design. Foam injection molding (FIM) is advanced and convenient way to fabricate structural materials. Recently, new foam machine developed, which only needs ultra‐low gas pressure microcellular foam. As universal plastic, polypropylene (PP) widely used due its good mechanical properties. But after foaming, the toughness of PP te...

Introduction Microcellular foams with cell sizes less than 10 μm and cell densities larger than 10cells/cm [1] are gaining commercial importance as lightweight structural materials. The idea of introducing small bubbles in solid polymers was first proposed by Num P. Suh [2] in 1890s and the rationale was that if the bubbles are even smaller than the critical flaws in the polymer matrix and can ...

Abstract Poly(3‐hydroxybutyrate‐co‐3‐hydroxyhexanoate) (PHBH) foams were prepared by a foam injection molding (FIM) process using nitrogen (N 2 ) as physical blowing agent. PHBH is marine degradable polymer known for its heat treatment weakness. Gel permeation chromatography and rheological measurements showed that the molecular weight was reduced when processed at temperature higher than 160°C...

Microcellular foams with unique cellular structures were prepared from poly(lactic acid) (PLA) and poly(butylene succinate-co-adipate) (PBSA) blends using a foam injection molding technique core-back operation. PLA PBSA are biopolymers that partially miscible each other. When these blended, several blend morphologies appeared found to be dependent on the ratio. The thermal rheological propertie...

Microcellular plastics are investigated for a basis for application as insulation in large electrical transformers. These cellular foams contain billions of cells per cubic centimeter with diameters smaller than 10 microns. The insulation material concept involves saturating microcellular plastics with mineral oil. The electrical strength of the insulation is dependent on completely filling all...

The production of microporous carbon foams from renewable starch microcellular foam-fiber (SMCF-Fiber) composites is described. Carbon foams are used in applications such as thermal insulation, battery electrodes, filters, fuel cells, and medical devices. SMCF-Fiber composites were created from an aquagel. The water in the aquagel was exchanged with ethanol and then dried and carbonized. Higher...