[논문]Bio-film Composites Composed of Soy Protein Isolate and Silk Fiber: Effect of Concentration of Silk Fiber on Mechanical and Thermal Properties

Prabhakar, M.N.; Song, Jung Il

doi:10.7234/composres.2014.27.5.196

[국내논문] Bio-film Composites Composed of Soy Protein Isolate and Silk Fiber: Effect of Concentration of Silk Fiber on Mechanical and Thermal Properties 원문보기

Composites research = 복합재료, v.27 no.5, 2014년, pp.196 - 200

Prabhakar, M.N. (Dept. of Mechanical Engineering, Changwon National University) , Song, Jung Il (Dept. of Mechanical Engineering, Changwon National University)

Abstract ▼ AI-Helper

A novel, simple and totally recyclable method has been developed for the synthesis of nontoxic, biocompatible and biodegradable bio-composite films from soy protein and silk protein. Bio films are defined as flexible films prepared from biological materials such as protein. These materials have potential application in medical and food as a packaging material. Their use depends on various parameters such as mechanical (strength and modulus), thermal, among others. In this study, prepare and characterization of bio films made from Soy Protein Isolate (SPI) (matrix) and Silk Fiber (SF) (reinforcement) through solution casting method by the addition of plasticizer and crosslinking agent. The obtained SPI and SPI/SF composites were subsequently subjected to evaluate their mechanical and thermal properties by using Universal Testing Machine and Thermal Gravimetric Analyzer respectively. The tensile testing showed significant improvements in strength with increasing amount of SF content and the % elongation at break of the composites of the SPI/SF was lower than that of the matrix. Though the interfacial bonding was moderate, the improvement in tensile strength and modulus was attributed to the higher tensile properties of the silk fiber.

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제안 방법

Thermogravimetric analysis (TGA) measurements of SP and SP/SF composites were carried out on DSC-TGA Q600 (TA instruments) under nitrogen atmosphere (flow rate 50 mL/min) at a heating rate of 20℃/min using approximately 11 mg of sample weight.

이론/모형

The tensile test was performed according to ASTM D638 standard using Universal Testing Machine INSTRAN 3369 at a crosshead speed of 5 mm/min and gauge length 50 mm and the test were performed at 28℃. Average and standard deviation of five specimens for each sample were tested and the tensile strength and tensile modulus were expressed as:

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