1. SEM IMAGES INTRODUCTION MATERIALS & METHODOLOGY 20I 5I-15 CP 10I-10CP
Biodegradable composites from natural rubber, coir pith and Isora fibre as various biomaterials
Amit Aroraa*, Ashish Koundleb, Maneetc,Sandeep pald Sabu Thomase, Nandakumar kalarikkalf
aPh.D. Scholar, Department of Chemical Engineering, IIT ROORKEE, Uttrakhand.
b,cDepartment of Chemical Engineering, Shaheed Bhagat Singh State Technical Campus, Ferozepur, Punjab.
dDepartment of mechanical Engineering,University of Petroleum & Energy studies,Dehradun,Uttrakhand
eSchool of Chemical Sciences, Mahatma Gandhi University, Kottayam, Kerela.
fSchool of Pure and Applied Physics, Mahatma Gandhi University, Kottayam, Kerela.
Corresponding author:
INTRODUCTION
Research efforts are currently being harnessed in developing a new class of fully biodegradable “green” composites by combining (natural/bio) fibres with biodegradable natural rubber. A composite material is a macroscopic combination of two or more distinct materials, having a recognizable interface between them. The properties of a composite are dependent on the properties of the constituent materials, and their distribution and interaction. Composite materials are developed because no single, homogeneous structured material can be found that has all of the desired properties for a given application. The good specific strengths and modulus, low density, economical viability, and biodegradability of the natural fibres over traditional fibres make them attractive candidate for reinforcement of polymers in all green composites. The purpose of making this hybrid composite is to improve the properties and lowering the cost of conventional composites.
RESULTS & DISCUSSIONS
MATERIALS & METHODOLOGY
The materials used to prepare the samples were Natural rubber coir pith and short Isora fibre. The samples were prepared in two roll mill mixer with various proportions of coir pith and Isora fibre such as 20 C.P, 5I-15C.P, 10I-10C.P, 15I-5C.P, 20I respectively with some curing agents(ZnO, Stearic Acid, TMTM, TDQ, CBS, Sulphur). After measuring cure time in Rheo-line meter, sheets were made in compression moulding machine. Sheets were then kept for 24 hours to regain strength, before tensile testing. Then the samples were cut into dumb bell shape specimen and the area that has to be stretched in UTM should be of 2mm thickness and 3mm width. Tensile tests were performed using Tinius Olsen tester. Every sample was then kept in UTM, with a crosshead speed of 500mm/min. And the method used was D412 method.
SEM IMAGES
20I
5I-15 CP
10I-10CP
15I-5CP
CONCLUSION:
The Young’s Modulus is found to show a characteristic distinction with the composition. In general, the modulus is found to increase with the increase in isora content. It is seen from the observation through the graph that the increase in the Modulus is rapid with the increase in isora content.
The elongation decreases with the decrease in content of the coir pith or decreases with the increase in content of short isora fibre. It can be because of the coir pith-coir pith interaction is much higher than the coir pith–isora interaction.
The ultimate tensile strength is also found to increase with the isora loading. The increase is minor upto 25 % isora by weight (or we can say that the ultimate tensile strength is poorly dependent on the coir pith), but it shows a rapid increase in the tensile strength upto 100 % isora content.