The Effect of Adding Silica from Rice Husk Ash to CFRP Composite on Thermal Properties

Abstrak

ABSTRACT

RAHMATILLAH, C. A, SUTRISNO, H. H., SARI, Y. 2022. The Effect of Adding Silica from Rice Husk Ash to CFRP Composite on Thermal Properties.

The increasing use of CFRP composites for various applications, particularly in the automotive field, emphasizes its importance in the analysis of the thermal properties. In the effort to improve the thermal properties of CFRP composites, an experiment was carried out in the form of adding silica from rice husk ash which theoretically has a high melting point and can reduce the rate of fire propagation of material. This research was conducted to determine the effect of the addition of silica from rice husk ash on the thermal stability of CFRP composites. Composite samples were made using epoxy resin, unidirectional long continuous carbon fiber, and silica from rice husk ash with various compositions: 0% (without silica), 5%, 10%, 15%, 20%, and 25%. The manufacturing process is carried out using the Hand Lay-Up method and were tested using a Thermogravimetric Analysis (TGA). The resulting thermogravimetric curve generated the data of thermal stability indicators values in the form of extrapolated onset temperature, mass change, and decomposition temperature. Based on the results of the research, it can be concluded that the addition of 15% silica from rice husk ash is the sample with the highest thermal stability value and generally, the addition of silica from rice husk ash to the CFRP composite can increase its thermal properties and can withstand ambient temperatures up to 405.9° C.

Key Words: CFRP composite, silica, thermal properties

ABSTRAK

RAHMATILLAH, C. A, SUTRISNO, H. H., SARI, Y. 2022. Pengaruh Penambahan Silika dari Abu Sekam Padi pada Material Komposit CFRP Terhadap Sifat Termal.

                Peningkatan penggunaan komposit CFRP menekankan pentingnya/signifikansinya dalam analisis sifat termal. Dalam upaya peningkatan sifat termal komposit CFRP, dilakukan eksperimen berupa penambahan silika dari abu sekam padi yang secara teori memiliki titik leleh yang tinggi dan dapat menurunkan laju rambat api pada material. Penelitian ini dilakukan untuk mengetahui pengaruh penambahan silika dari abu sekam padi terhadap stabilitas termal komposit CFRP. Pembuatan sampel komposit menggunakan resin epoksi, serat karbon jenis unidirectional long continous fiber, serta silika dari abu sekam padi dengan variasi komposisi: 0% (tanpa silika), 5%, 10%, 15%, 20%, dan 25%. Proses pembuatan dilakukan menggunakan metode Hand Lay-Up dan diuji menggunakan mesin Thermogravimetric Analysis (TGA). Kurva termogravimetri yang dihasilkan menunjukkan data nilai indikator stabilitas termal berupa temperatur onset ekstrapolasi, perubahan massa, dan temperatur dekomposisi. Berdasarkan hasil penelitian, dapat disimpulkan bahwa penambahan silika dari abu sekam padi sebanyak 15% merupakan sampel dengan nilai stabilitas termal tertinggi dan secara umum penambahan silika dari abu sekam padi pada komposit CFRP dapat meningkatkan sifat termalnya serta mampu menahan suhu ambien hingga 405,9 °C.

Kata kunci: komposit CFRP, silika, sifat termal