KARAKTERISASI NANOSTRUKTUR KARBON DARI GRAFIT HASIL MILLING[Characterization of Nanostructured Carbon from Graphite as Milling Product]

Yunasfi Yunasfi
2017 Metalurgi  
Intisari KARAKTERISASI NANOSTRUKTUR KARBON DARI GRAFIT HASIL MILLING. Telah dilakukan karakterisasi nanostruktur karbon dari grafit hasil milling. Nanostruktur karbon dibuat melalui proses milling dengan teknik high energy milling (HEM) terhadap serbuk grafit dengan variasi waktu milling antara 25 jam sampai 100 jam. Serbuk grafit hasil milling kemudian diidentifikasi fasanya dengan metoda difraktometer sinarx (XRD), ukuran partikel yang terbentuk dengan metoda particle size analyzer (PSA) dan
more » ... analyzer (PSA) dan diamati secara detil topologinya dengan metoda transmission electron microscopy (TEM). Hasil identifikasi fasa terhadap serbuk grafit hasil milling menunjukkan bahwa hanya muncul puncak difraksi C(002) dan C(004). Hal ini menunjukkan bahwa struktur grafit masih didominasi oleh fasa heksagonal. Intensitas puncak difraksi ini semakin rendah seiring dengan bertambahnya waktu milling. Hasil analisa dengan PSA menunjukkan terbentuknya karbon nanostruktur hasil milling, dimana ditunjukkan bahwa ukuran partikel karbon semakin kecil seiring dengan peningkatan waktu milling, yaitu dari 540 nm (25 jam) menjadi 190 nm (75 jam). Hasil analisa TEM menunjukkan adanya serat-serat pipih panjang berukuran diameter 10 -75 nm dan panjang 20 -200 nm. Kuantitas serat karbon ini semakin banyak seiring dengan peningkatan waktu milling. Hal ini menunjukkan bahwa akibat adanya tumbukan antara partikel karbon dengan bola-bola milling selama proses milling mengakibatkan penghancuran partikel-partikel karbon sampai ke ukuran nano serta pembentukan serat karbon. Abstract CHARACTERIZATION OF NANOSTRUCTURED CARBON FROM GRAPHITE AS MILLING PRODUCT. Characterization of nanostructured carbon from graphite as milling product of high energy milling (HEM) technique was carried out. Nanostructured carbon was prepared by milling process against the graphite powder with various of milling time between 25 hours up to 100 hours. A milled graphite powder was then identified their phase by using phase identification with x-ray diffractometer methods, formed particle size was measured by particle size analyzer (PSA) and the detail phase including the tophology and measurement of particle size were observed with transmission electron microscopy (TEM) methods. The result of identification phase of the graphite powder milling results showed that the intensity of diffraction peaks which appear only diffraction peaks for carbon C(002) C(004) and C(110), while for other atoms do not identified. This indicates that the graphite structure is still dominated by the hexagonal phase. The intensity of diffraction peaks is lower along with increasing milling time. PSA analysis result shows the formation of carbon nanostructure as the result of milling process, which the carbon particle size decreases with the increasing of milling time; from 540 nm (25 hours) to 190 nm (75 hours). TEM analysis result shows the existence of long small fiber with the size of 10 -75 nm and the length of 20 -200 nm. This shows that the result of collisions between particles of graphite powder with milling balls during milling process, resulting in the destruction of the graphite particles until nano size and also in the forming of carbon fiber.
doi:10.14203/metalurgi.v27i3.238 fatcat:emhswkkymrb55eoz5gytumph6y