Prakasa, Bhisma Anugerah Agung and Matahari, Sam (2015) Sintesa superabsorben aerogel selulosa dari kertas bekas. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Penelitian ini bertujuan untuk mempelajari proses sintesa
dan karakteristik dari superabsorbent aerogel dari kertas bekas.
Proses sintesa diawali dengan tahap pembuatan pulp dari kertas
bekas untuk memperoleh selulosa. Selanjutnya pulp dicampur
dengan larutan NaOH 2 wt% dengan variasi penambahan larutan
urea 0 wt% - 10 wt% sehingga terbentuk gel. Gel yang terbentuk
dikoagulasikan menggunakan etanol 99 vol% dan kemudian
direndam dalam demineralized water sebagai solvent exchange.
Gel kemudian dibekukan pada suhu -18°C. Gel yang telah
membeku selanjutnya dikeringkan menggunakan freeze dryer
sehingga air yang terkandung di dalamnya mengalami sublimasi.
Berdasarkan percobaan yang telah dilakukan didapatkan aerogel
berwarna putih dengan densitas yang sangat ringan yaitu sebesar
0,043 g/cm3 dengan diameter serat sebesar 7,5-10 μm dan
pororsitas sebesar 0,971. Aerogel yang dihasilkan mampu
menyerap air hingga 24,015 kali berat keringnya. Kemampuan
menyerap air dan porositas pada aerogel yang dihasilkan
berbanding terbalik dengan konsentrasi urea yang ditambahkan.
Aerogel dapat digunakan kembali dengan cara diperas hingga
89,9% air yang terkandung mampu terpisah. Aerogel juga dapat
digunakan untuk menyerap minyak hingga 19,071 kali masa
keringnya. Secara mekanis, melalui uji TGA aerogel selulosa
yang dihasilkan dapat bertahan hingga suhu 230°C dan dari uji tekan aerogel yang dihasilkan memiliki modulus young maksimal
sebesar 10.200 N/m2 dan menunjukkan fleksibilitas yang baik.
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The purpose of this research was to developed a method
of synthesizing and characterizing superabsorbent cellulose
aerogel from paper waste. This research was begun by removing
cellulose from the paper waste using re-pulping process. Then,
the pulp that had been removed was mixed with 2%wt NaOH
solution and urea, which 0%wt – 10%wt variation was given, and
freezed until became a gel. Then, the it was submerged into 99
vol% ethanol for coagulation process. After that, gel was
submerged into demineralization water for the solvent exchange
process. Gel was freezed at -18°C in the freezer. Water contain in
gel was removed by using freeze drying method, so water contain
in the sample could be removed by sublimation. The result was
the white-colored aerogel which has extremely low density of
0,043 g/cm3 with the diameter of fiber is 7,5-10 μm and the
porosity is 0,971. The Aerogel has the capacity to absorb water
until 24,015 its weight, more urea concentration added on to the
solution, the lower absorbtion capacity and porosity aerogels had.
Aerogel can be reused by squeezing until its removed 89,8% the
existing water. Furthermore, its can absorb oil until 19,071 its
weight. Mechanically, by TGA characterization the aerogel could be used until 230°C and by compression test the maximum
modulus young that aerogel had was 10.200 N/m2 which
indicated the sample has a good flexibility.
| Item Type: | Thesis (Undergraduate) |
|---|---|
| Additional Information: | RSK 541.345 13 Pra s |
| Uncontrolled Keywords: | Superabsorben; Selulosa; Aerogel; Kertas Bekas |
| Subjects: | Q Science > QC Physics > QC162 Adsorption and absorption |
| Divisions: | Faculty of Industrial Technology > Chemical Engineering > 24201-(S1) Undergraduate Thesis |
| Depositing User: | - Taufiq Rahmanu |
| Date Deposited: | 04 Apr 2019 03:29 |
| Last Modified: | 04 Apr 2019 03:29 |
| URI: | http://repository.its.ac.id/id/eprint/62694 |
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