Characterization of calcium carbonate obtained from oyster and mussel shells and incorporation in polypropylene

Abstract

There is a high content of calcium carbonate in mussel and oyster shells, which can be used in the formulation of medicine, in construction or as filler in polymer materials. This work has as its main objective to obtain calcium carbonate from mussel and oyster shells and used as filler in polypropylene compared their properties with polypropylene and commercial calcium carbonate composites. The shellfish was milling and heated at 500 °C for 2 hours. The powder obtained from shellfish were characterized by scanning electron microscopy (SEM), X-ray fluorescence, particle size distribution and abrasiveness and compared with commercial CaCO 3 and mixed with polypropylene. The thermal and mechanical properties of polypropylene with CaCO 3 obtained from oyster and mussel shells and with commercial CaCO 3 were analysed. The results showed that CaCO 3 can be obtained from oyster and mussel shell and is technically possible to replace the commercial CaCO 3 for that obtained from the shells of shellfish in polypropylene composites.

Characterization of green composites from biobased epoxy matrices and bio-fillers derived from seashell wastes

“…The optimum curing time is close to 20-25 min since the storage modulus tends to a constant value of 3.6 MPa as observed in influence the oxidation of the polymeric matrix appear in concentrations below to 0.5 wt. % reducing the risk of this kind of oxidation [22].…”

PRESSURE CHANGES IN MEDIA MAINTENANCE OF SHELL PEARL (Pinctada maxima) LARVAE ON PROTEASE ENZYME ACTIVITY ENHANCING GROWTH AND SURVIVAL

“…Penerbitan yang telah dilakukan dijadikan sebagai pendekatan referensi dan acuan dalam peningkatan kualitas hasil pemijahan hingga 656 http://itk.fpik.ipb.ac.id/ej_itkt72 pembesaran di laut. Pertumbuhan cangkang kerang dan pembentukan butiran adalah hasil biomineralisasi dari lapisan cairan nacre yang mengandung kalsium karbonat (CaCO 3 ) (Naganuma et al, 2014;Caiping et al, 2005;Hamester et al, 2012). Dikemukakan pula bahwa persentasi kandungan kalsium karbonat dalam cangkang kerang sebesar 95% sementara sisanya adalah kandungan bahan organik yang lain (Hamester et al, 2012;Feng et al, 2009) Proses pembentukan cangkang larva kerang mutiara sangat ditentukan oleh ketersedian kalsium karbonat yang diproduksi oleh enzim dalam mencerna protein.…”

“…Pertumbuhan cangkang kerang dan pembentukan butiran adalah hasil biomineralisasi dari lapisan cairan nacre yang mengandung kalsium karbonat (CaCO 3 ) (Naganuma et al, 2014;Caiping et al, 2005;Hamester et al, 2012). Dikemukakan pula bahwa persentasi kandungan kalsium karbonat dalam cangkang kerang sebesar 95% sementara sisanya adalah kandungan bahan organik yang lain (Hamester et al, 2012;Feng et al, 2009) Proses pembentukan cangkang larva kerang mutiara sangat ditentukan oleh ketersedian kalsium karbonat yang diproduksi oleh enzim dalam mencerna protein. Sebagaimana dikemukakan oleh Naganuma et al (2014) bahwa kegagalan pembentukan cangkang kerang mabe (Pteria penguin) pada fase D-veliger sangat ditentukan oleh ketersedian komponen protein yang digunakan untuk proses metabolisme enzim dalam pembentukan cairan nacre yang menghasilkan elemen kristal kalsium karbonat (CaCO 3 ).…”

“…Demikian juga penjelasan Feng et al (2009) bahwa ketersedian kandungan protein dalam daging sangat mempengaruhi endapan kalsium karbonat (CaCO3) dalam memben tuk pertumbuhan cangkang melalui cairan nacre. Dijelaskan terdahulu bahwa persentasi kandungan kalsium karbonat dalam cangkang kerang sebesar 95%, sementara sisanya adalah kandungan bahan organik yang lain (Hamester et al, 2012;Feng et al, 2009) …”

Sea coral-derived cuttlebone reinforced epoxy composites: Characterization and tensile properties evaluation with mathematical models

“…36 SEM images of neat epoxy showed brittle type of fracture while CB/EP and HB/ EP composites showed smooth fracture surfaces. Previous studies [13][14][15]20 have reported the use of organic compounds to improve the interaction between CaCO 3 and matrix. Cuttlebone particles having organic compounds on the surface by nature induced good interaction between filler and composites.…”