ساخت و مشخصه يابي نانو كامپوزيت پلي اتيلن

چكيده انگليسي :

Synthesis and Characterization of Forsterite Polyethylene Nanocomposite Mehran Jaberzadeh mehran jaberzadeh@gmail com February 05 2011 Department of Materials Engineering Isfahan University of Technology Isfahan 84156 83111 Iran Degree M ScLanguage FarsiSupervisor R Emadi remadi@cc iut ac ir Abstract In recent years the use of polymer matrix nano composites to repair of bone defects and implantdevelopment is increasing This is while the natural bone is detected as a nano composite with polymer matrixmade by collagen and hydroxyapatite as reinforcements Although collagen hydroxyapatite nano composite isthe most similar nano composite to the bone limitation of sources and methods providing collagen and lowstrength of this nano composite limite its usage Showing the bioactivity and better mechanical characteristics ofnano forsterite than nano hydroxyapatite polyethylene forsterite nano composite is discussed as a replacementof collagen hydroxyapatite nano composite while polyethylene is an available polymer The objective ofpresent research was synthesis and characterization of polyethylene forsterite nano composite In this study talc magnesium carbonate and polyethylene UHMWPE were used as initial materials First the powder of talcand magnesium carbonate was mixed with specific fraction to manufacture of forsterite Second themanufactured forsterite was heated in 10 minutes at 1000 c Afterwards the manufactured forsterite in this way was analysed with X Ray Diffraction XRD in order to observe the phase structure and SEM in order toobserve the morphology and distribution of nano forsterite and bioactivation analysis for four weeks in SBF solution The synthesized forsterite was mixed with polyethylene by mechanical milling and was transformed tonano composite with foure different volumes of forsterite by two ways extrusion and press The manufacturednano composites with these two ways were analysed with XRD in order to observe the phase structure toendorse the existence of intent phases In order to observe the morphology of nano composite and distribution offorsterite nano crystallite in polymer matrix SEM was used In order to analyse the bioactivity of nanocomposites they were put in SBF solution for 28 days After bioactivation analysis they were analysed byXRD SEM and EDX to identify the new productions and their morphology Also the nano compositesmanufactured by extrosion were used for tensile examaination to analyse their mechanical characteristics andcompare with bone and other polyethylene matrix nanocomposites with similar applications The results wereshowing the creation of forsterite with 30 nano meter dimensions after 10 hour mechanical activation and heattreatment in 1000 C for 10 minutes Furthermore the forsterite used in nano composites were 30 nanometerwith desirable distribution The nano composites had ability to make hydroxyapatite despite their lowerbioactivity than other polyethylene matrix biocomposites The nano composite with 40 percent volume forsteritehas the most bioactivity among the polyethylene forsterite nano composites Also this nano composite has themost elasticity module and in this way is the most similar polyethylene matrix nano composite to the bonebecause it has the most similar mecahnical characteristics to the bone specially cortical bone Key wordsNano Composite Forsterite Polyethylene Extrosion Press Elasticity Module Bioacactive

جابرزاده، مهران

ساخت و مشخصه يابي نانو كامپوزيت پلي اتيلن - فورستريت

اكستروژن , پرس , مدول الاستيسيته , زيست فعال