EFFECT OF UV IRRADIATION ON VEGETABLE TANNED LEATHER
Journal Title: Revista de Pielărie Încălţăminte - Year 2015, Vol 15, Issue 4
Abstract
This article aims at studying the influence of UV irradiation on vegetable tanned leather. Vegetable tanned leather was treated in QUV chamber (T = 50°C, irradiance = 1.77 W/mm2nm, λUVA = 340 nm) for 0, 30, 60, 90, 120 and 150 hours. Then, these samples were evaluated by different analytical methods to get a whole picture of the leather during the irradiation. Micro hot table (MHT), differential scanning calorimetry (DSC) and thermogravimetry (TG) were used to evaluate the influences of UV irradiation on thermal behaviors. Damages to mechanical properties were also analyzed by a standard method. Fourier transform infrared spectroscopy (FT-IR) and optical microscopy were used to investigate the changes of structural and histological properties during aging process. With the extension of aging time, thermal stability was gradually reduced to lower values, including shrinkage temperature, thermal denaturation temperature, associated enthalpy and temperature for maximum decomposition rate. In addition, mechanical properties such as tensile strength, tear strength and elongation at break also gradually decreased. The FT-IR results showed that, during the aging process, amide I and amide II band of the tanned collagen gradually shifted to lower numbers, indicating an increasingly serious damage to the structure of the peptide chain, that corresponds to obvious fibril breakages which are also detected through optical microscopy.
Authors and Affiliations
Yanping GAO, Shuang YANG, Xiaoyun JIAN, Lucreţia MIU, Carmen GAIDĂU, Wuyong CHEN
Keywords
Related Articles
- EP ID EP536204
- DOI -
- Views 126
- Downloads 0
EFFECTS OF THE STRIDE LENGTH ON THE GAIT AND INTRA-LIMBS COORDINATION OF HEALTHY CHILDREN AGED 3 TO 6
Body motion adjusts while the stride lengths changes, but few studies report those influences on the gait mechanism and intra-limbs coordination of children; therefore, the purpose of our study was to evaluate the gait m...
REGULATIONS FOR THE PRESCRIPTION OF FOOTWEAR AS MEDICAL DEVICE
Orthopedic footwear is part of the category of medical devices used in the conservative treatment of foot and lower limbs pathomechanics. For the custom-made medical device the manufacturer has to perform the design base...
BIO-COMPOSITES WITH LEATHER FIBERS AND CEMENT - PHYSICO-MECHANICAL AND STRUCTURAL CHARACTERIZATION
Circular economy systems keep the added value in products for as long as possible and eliminate waste. Resources are kept within the economy when a product has reached the end of its life, so that they can be productivel...
INGA 3D – CREATIVE TRANSFER OF COMPETENCE IN 3D FOOTWEAR CAD TO VET PROFESSIONALS
INGA 3D project - Creative Transfer of Competence in 3D Footwear CAD to VET Professionals aims to transfer and extend innovative software solutions and 3D technologies for Footwear Computer Aided Design. The project brin...
INFLUENCE OF TREADS GROOVE, HARDNESS AND CONTAMINANTS ON THE SLIP RESISTANCE OF OUTSOLE OF HIGH-HEELED SHOES
The aim of this study was to explore the interaction effects of hardness (75A, 80A, 90A), structures of tread groove (spacing, width, depth and orientation) and contaminants (dry, wet and vegetable oil) on coefficient of...