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Abstrak :
ABSTRAK
Plastik sebagai bahan kemasan dan coating mengalami peningkatan global setiap tahun. Ini menimbulkan masalah serius bagi lingkungan karena sulitnya terdegradasi. Salah satu solusi untuk mengatasi masalah limbah plastik adalah penggunaan bioplastik. Untuk meningkatkan sifat mekanik dari bioplastik, biokomposit yang dibuat dengan penambahan aditif dan pengisi tertentu. Tujuan dari penelitian ini adalah untuk mengetahui pengaruh Butil Benzyl Phthalate plasticizer BBP dan Seng Oksida ZnO nanopartikel terhadap sifat mekanik dan termal biokomposit selulosa asetat butirat CAB / organoclay.Nanopartikel ZnO disintesis dari prekursor ZnO komersial melalui metode reduksi ukuran sol-gel menggunakan asam sitrat. Seng sitrat dikalsinasi pada suhu 600oC. ZnO nanopartikel dengan ukuran rata-rata 44,4 nm diperoleh pada rasio seng nitrat 1:2 terhadap asam sitrat. Film biokomposit dibuat dengan menggunakan metode solution casting dengan aseton sebagai pelarut. Penambahan plasticizer BBP dan nanopartikel ZnO sebesar masing-masing 30 dan 10 membuat biokomposit memiliki nilai kekuatan tarik 2,22 MPa. Pergeseran nilai suhu transisi gelas Tg selulosa asetat butirat tidak dapat terlihat dikarenakan homogenitas biokomposit saat proses casting.

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ABSTRACT
Plastics as packaging materials and coatings have increased globally every year. This poses a serious problem for the environment because of the difficulty to degrade. One solution to overcome the problem of plastic waste is the use of bioplastics. To improve the mechanical properties of bioplastics, biocomposites are fabricated with the addition of certain additives and fillers. The purpose of this study was to determine the effect of plasticizer Butyl Benzyl Phthalate BBP and Zinc Oxide ZnO nanoparticles to the mechanical and thermal properties of biocomposite cellulose acetate butyrate CAB organoclay.ZnO nanoparticles were synthesized from a commercial ZnO precursor through sol gel method to reduce the size using citric acid. Zinc citrate was calcined at a temperature of 600oC. ZnO nanoparticles with an average size of 44.4 nm were obtained at a mole ratio of zinc nitrate citric acid was 1 2. Biocomposite films were made by solution casting method using acetone as the solvent. The addition of plasticizer BBP and ZnO nanoparticles by 30 and 10 respectively in the biocomposites produced a tensile strength of 2,223 MPa. Shifting value of the glass transition temperature Tg of cellulose acetate butyrate could not been observed due to the homogeneity of the biocomposite during the process of casting.

Abstrak :
Pada penelitian ini dipelajari pengaruh penambahan plasticizer pada maleabilitas pelat implan berbasis PLA untuk aplikasi fraktur tulang kraniomaksilofasial. Spesimen disintesis dengan menambahkan plasticizer dengan konsentrasi 2% pada campuran PLLA dan PDLLA (70:30). Proses pencampuran dilakukan dengan rheomixing dan pencetakan spesimen dengan oven vakum. Spesimen dikarakterisasi untuk mengetahui sifat-sifatnya. Penambahan plasticizer gliserol, castor oil dan PEG 400 memberikan pengaruh terhadap pergeseran nilai absorbansi spektrum infra merah. Selain itu, nilai temperatur transisi gelas (Tg) juga mengalami penurunan dari 62,3oC menjadi 58,5oC. Penambahan plasticizer juga menurunkan nilai kekuatan tekuk, regangan tekuk, dan modulus elastisitas spesimen. Hasil evaluasi analisis mikrostruktur menunjukkan bahwa campuran bersifat miscibel. Hasil pengujian degradasi menunjukkan bahwa spesimen 30PDLLA/gliserol mengalami proses degradasi dengan nilai penurunan terkecil. ......In this study, the effect of plasticization to the maleability of polilactide-based implant plate in craniomaxillofacial bone fracture application was studied. Specimens were synthesized by adding a plasticizer with a concentration of 2 %wt in a mixture of PLLA and PDLLA (70:30). The mixing process was carried out by rheomixing, and the forming process was utilized a vacuum oven. Specimens were characterized to determine their properties. The addition of glycerol plasticizer, PEG 400, and castor oil has an effect on the shift in the absorbance value of the infrared spectra. In addition, the value of the glass transition temperature (Tg) also decreased from 62.3oC to 58.5oC. The addition of plasticizer also reduces the bending strength, bending strain, and modulus of elasticity of the specimens. The evaluation of the microstructural analysis showed that the mixture was miscible. The results of the degradation test showed that the plasticized specimen 30PDLLA/glycerol underwent a degradation process with the smallest portion.