Faculty of Graduate Studieshttp://dr.lib.sjp.ac.lk/handle/123456789/11442024-03-29T10:21:45Z2024-03-29T10:21:45ZSynthesis of bone cement from a natural mineral for biomedical industryHapuhinna, H.K.G.K.D.K.Gunaratne, R.D.Pitawala, H.M.J.C.http://dr.lib.sjp.ac.lk/handle/123456789/127162023-04-06T10:22:40Z2019-01-01T00:00:00ZSynthesis of bone cement from a natural mineral for biomedical industry
Hapuhinna, H.K.G.K.D.K.; Gunaratne, R.D.; Pitawala, H.M.J.C.
Study carried to find out chemical and structural
suitability of newly synthesized Eppawala Hydroxyapatite
composite as bone cement, by comparing and contrasting it with
human bone as well as commercially available bone cement,
which is currently used in orthopedic surgeries. Therefore, a
mixture of commercially available bone cement and its liquid
monomer, commercially available Methyl Methacrylate (MMA)
and a mixture of Solid State synthesized Eppawala
Hydroxyapatite powder with commercially available MMA were
prepared as the direct substitution for bone cement. Then
physical and chemical properties including composition,
crystallinity, presence of functional groups, thermal stability,
surface morphology, and microstructural features were examined
compared to human bone. Results show there is a close similarity
between synthesized product and human bone while credenting
high thermal stability, good crystalline, and porous properties
than the commercial product. Finally, study concluded newly
synthesized composite can be applied directly as a substitution
for commercial bone cement.
2019-01-01T00:00:00ZA novel approach of synthesizing 2-hydroxyethyl methacrylate embedded hydroxyapatite composites for dentistry applicationsHapuhinna, H.K.G.K.D.K.Gunaratne, R.D.Pitawala, H.M.J.C.http://dr.lib.sjp.ac.lk/handle/123456789/127142023-04-06T10:19:18Z2019-01-01T00:00:00ZA novel approach of synthesizing 2-hydroxyethyl methacrylate embedded hydroxyapatite composites for dentistry applications
Hapuhinna, H.K.G.K.D.K.; Gunaratne, R.D.; Pitawala, H.M.J.C.
This research focused to find out chemical and structural suitability of novel Hydroxyapatite composite
synthesized using Chloroapatite and 2-hydroxyethyl methacrylate as Dental filling material. For that, Solid State
Sintering technique was used to produce Hydroxyapatite using Sri Lankan Chloroapatite and Calcium
hydroxide. After reinforcing it with 2-hydroxyethyl methacrylate, physical and chemical properties were
examined via comparing and contrasting it with the human tooth and commercially available Glass Ionomer
cement (GIC), used in the field of Dentistry. Results show there is a close similarity between the synthesized
product and the human tooth. Therefore, the study concluded that synthesized Hydroxyapatite composite can be
used directly as a substitution for commercial dental filling material
2019-01-01T00:00:00ZSynthesis of Hydroxyapatite 2-Hydroxyethyl Methacrylate Blended Material for DentistryHapuhinna, H.K.G.K.D.K .Gunaratne, R.D.Pitawala, H.M.J.C.http://dr.lib.sjp.ac.lk/handle/123456789/127132023-04-06T09:44:33Z2019-01-01T00:00:00ZSynthesis of Hydroxyapatite 2-Hydroxyethyl Methacrylate Blended Material for Dentistry
Hapuhinna, H.K.G.K.D.K .; Gunaratne, R.D.; Pitawala, H.M.J.C.
As a bio ceramic hydroxyapatite and its composites have applied in several biomedical applications.
This research used to examine suitability of Hydroxyapatite 2-hydroxyethyl methacrylate composite
for dentistry. Sri Lankan chlorapatite, ethanol and dil. acid used to synthesize hydroxyapatite by sol
gel technique and then it was reinforced with polymer prior to compare and contrast it’s chemical and
physical properties with human tooth and commercial dental filling material. Results show there is a close
similarity between newly synthesized product and human tooth. It has credent high thermal stability,
good crystalline and porous properties than the commercial product. At the end, the study concluded that
the new material can be used directly as a substitution for human tooth.
2019-01-01T00:00:00ZThermal Mechanical Property Enhancement with Silicon Carbide Ceramic Filled Composites for Industrial ApplicationsHapuhinna, K.Gunaratne, R.D.Pitawala, J.http://dr.lib.sjp.ac.lk/handle/123456789/127122023-04-06T09:32:36Z2022-01-01T00:00:00ZThermal Mechanical Property Enhancement with Silicon Carbide Ceramic Filled Composites for Industrial Applications
Hapuhinna, K.; Gunaratne, R.D.; Pitawala, J.
Epoxy composites with glass fiber reinforcement can be found in the automotive and aer‐
ospace industries. In this study, the properties of the epoxy matrix were enhanced by processing
composites filled with ceramic particles of silicon carbide (SiC). At first, SiC‐filled E‐glass fiber‐re‐
inforced epoxy composites/sandwich structures were processed using the hand layup technique.
Next, processed composites were characterized using a tensile tester and an Izod impact tester to
determine the best mixing ratio of ceramic‐embedded epoxy composites. The highest mechanical
properties were obtained according to ASTM D638 and D256 standards. Next, Fourier transform
infrared spectroscopy (FTIR), scanning electron microscopy (SEM), x‐ray diffraction analysis (XRD),
analysis of differential scanning calorimetry (DSC), and thermogravimetric analysis (TGA) were
carried out respectively to find out the presence of functional groups, surface morphology, crystal‐
lographic structure, glass transition temperature (Tg) and thermal/material stability of processed
composites. In the end, the study elaborates that the mechanical properties of epoxy matrix compo‐
sites were improved by the addition of SiC ceramic fillers, and among processed composites,
10%SiCE composite carried the highest properties, including the Tg value of 62.8 °C, 69.87 MPa for
tensile strength and 57.12 kJ m−1 for impact strength.
2022-01-01T00:00:00Z