Rahmi, Arika Fadhia and Agustian, Muhammad Irsan (2017) Sintesis Superabsorben Aerogel Selulosa Berbasis Bagasse. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Tujuan penelitian adalah untuk mengetahui bahwa bagasse selain mengandung selulosa, namun juga mengandung silika yang memiliki kadar tinggi dapat menjadi bahan baku superabsorben aerogel selulosa yang bersifat reusable. Penelitian ini dimulai dengan tahap ekstraksi selulosa yang meliputi penggilingan mekanis terhadap bagasse dan diayak hingga berukuran 100 mesh. Diikuti dengan delignifikasi dengan reaktor hidrotermal dengan kondisi operasi 150oC selama 4 jam kemudian dilarutkan dengan air untuk menghilangkan lignin. Kemudian tahap pembuatan aerogel yang dimulai dengan penambahan silika (0, 30, 40, 50, dan 60%) dan campuran NaOH : Urea (1:4,5,6,7) yang selanjutnya dilakukan sonikasi, gelasi, aging dengan HCl 2M, koagulasi dengan etanol 99%, solvent exchange, dan freeze drying dengan kondisi operasi suhu – 40 oC dan tekanan 10 mTorr. Hasilnya aerogel selulosa yang berhasil disintesis berwarna keabu-abuan dengan rentang densitas dari 0,091 g/cm3 sampai 0,102 g/cm3 dan rentang porositas dari 0,680 sampai 0,715. Aerogel selulosa yang dihasilkan mampu menyerap air hingga 20,04 kali massa keringnya (sampel 1:5 50%). Kemampuan menyerap air dan porositas pada aerogel yang dihasilkan berbanding terbalik dengan konsentrasi urea yang ditambahkan. Aerogel selulosa juga mampu menyerap minyak (oli) hingga 10,36 kali massa keringnya (sampel 1:5 50%). Luas permukaan aerogel selulosa yang dihasilkan mencapai 59,12. m2/g. Berdasarkan uji tekan yang dilakukan, aerogel selulosa yang dihasilkan memiliki modulus young maksimal sebesar 84.655,310 N/m2.
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The objective of this
research is to find out that aside from
containing cellulose, bagasse also contains silica and it could be
utilized as raw material for synthesizing reusable superabsorbent
i.e. cellulose aerogel.
The study began with cellulose extraction
stage which inclu
ded mechanical grinding of bagasse and it sieved
to a size of 100 mesh.
Followed by delignification using
hydrothermal reactor with operating conditions of 150
°
C for 4
hours then it is diluted with water to remove lignin form the
pulp.
Then the aerogel s
ynthesis stage starts with the addition of
silica (0, 30, 40, 50, and 60%) at low temperature, and of NaOH:
Urea (1: 4,5,6,7) mixture which is then performed sonication,
gelation, aging with HCl 2M, coagulation with ethanol
99%,
solvent
exchange,
and
freez
e
drying
with
operating
temperature of
-
40
°
C and operating pressure of 10 mTorr.
The
synthesized cellulose aerogel has grayish color with density range
from 0.091 g / cm
3
to 0.102 g / cm
3
and porosity range from 0.680
to 0.715.
The resulted cellulose
aerogel can absorb water up to
20,0
4
times its dry mass (sample 1: 5 50%).
Its ability to absorb
water and its porosity is inversely proportional to both the added
urea concentration and silica concentration.
The cellulose aerogel is also able to abso
rb oi
l (lubricant) up to 10,36
times its dry mass
(sample 1: 5 50%).
The surface area of resulted cellulose aerogel
is
59,12 m
2
/g. B
ased on the performed compression test, the
cellulose aerogel has
young modulus
of
84.655,310
N/m
2
.
| Item Type: | Thesis (Undergraduate) |
|---|---|
| Uncontrolled Keywords: | Bagasse, Aerogel, Selulosa, Superabsorben |
| Subjects: | T Technology > TP Chemical technology > TP248 Nanogels. Nanoparticles. |
| Divisions: | Faculty of Industrial Technology > Chemical Engineering > 24201-(S1) Undergraduate Thesis |
| Depositing User: | Arika Fadhia Rahmi |
| Date Deposited: | 28 Sep 2017 07:20 |
| Last Modified: | 06 Mar 2019 03:49 |
| URI: | http://repository.its.ac.id/id/eprint/44307 |
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