Modifikasi Substrat Aerogel Selulosa Berbasis Serabut Kelapa Dengan Metode Elektroforesis Sebagai Substrat Solar Steam Generator (SSG)

Pertiwi, Beta Cahaya (2023) Modifikasi Substrat Aerogel Selulosa Berbasis Serabut Kelapa Dengan Metode Elektroforesis Sebagai Substrat Solar Steam Generator (SSG). Masters thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Ketersediaan air bersih saat ini sangat memprihatinkan. Steam Generation (SSG) diyakini mampu menjadi solusi untuk permasalahan air bersih ini. Penelitian ini bertujuan untuk mempelajari modifikasi orientasi serat selulosa menjadi tegak dan sejajar dengan menggunakan metode elektroforesis aerogel selulosa sebagai substrat SSG. Aerogel selulosa berfungsi untuk mengalirkan air dari reservoir ke permukaan evaporasi dan berfungsi sebagai isolator. Aerogel selulosa disintesis dari sabut kelapa dengan metode sol-gel, yang diawali dengan delignifikasi dengan NaOH. Selulosa yang didapatkan kemudian didispersikan ke dalam larutan crosslinker urea-NaOH atau urea-NH4OH, lalu dilanjutkan dengan proses gelasi-elektroforesis untuk memodifikasi arah serat selulosa. Gel selulosa yang terbentuk dikoagulasi dengan menggunakan larutan etanol, dan dilanjutkan solvent exchange dengan air demin sampai aroma etanol hilang. Hidrogel kemudian dikeringkan dengan metode freeze drying untuk menghilangkan kadar air, tanpa merusak struktur aerogel selulosa. Sedangkan untuk mengetahui kinerja aerogel selulosa sebagai substrat SSG, dilakukan analisa lanjutan seperti densitas, porositas, kapilaritas dan konduktivitas termal. Kristalinitas aerogel selulosa diuji pula dengan menggunakan XRD.
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The availability of clean water is currently very concerning. Steam Generation (SSG) is believed to be a solution to this clean water problem. This study aims to study the modification of the orientation of cellulose fibers to be upright and parallel using the cellulose aerogel electrophoresis method as an SSG substrate. Cellulose aerogel serves to drain water from the reservoir to the evaporating surface and serves as an insulator. Cellulose aerogel is synthesized from coconut husk by sol-gel method, which begins with delignification with NaOH. The cellulose obtained is then dispersed into a solution of urea-NaOH or urea-NH4OH, then continued with a gelation-electrophoresis process to change the direction of the cellulose fibers. The formed cellulose gel is coagulated using ethanol solution and continued solvent exchange with demineralized water until the ethanol aroma disappears. The hydrogel is then dried using a freeze-drying method to remove the moisture content, without damaging the structure of the cellulose aerogel. Meanwhile, to find the performance of cellulose aerogel as an SSG substrate, further analysis was carried out such as density, porosity, capillarity, and thermal conductivity. The crystallinity of cellulose aerogel was also tested using XRD.

Item Type:	Thesis (Masters)
Uncontrolled Keywords:	Cellulose aerogel, Electrophoresis, Substrate, Aerogel Selulosa, Elektroforesis, Substrat, Isolator, Solar Steam Generation
Subjects:	Q Science > QD Chemistry > QD320 Cellulose. Hydrolysis
Divisions:	Faculty of Industrial Technology and Systems Engineering (INDSYS) > Chemical Engineering > 24101-(S2) Master Thesis
Depositing User:	Beta Cahaya Pertiwi
Date Deposited:	07 Feb 2023 18:15
Last Modified:	07 Feb 2023 18:15
URI:	http://repository.its.ac.id/id/eprint/96477

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