PENGARUH PERUBAHAN SUHU PADA PROPERTI ADSORPSI DAN DESORPSI THERMOSENSITIVE NIPAM-co-DMAAPS GEL

AMARAL, JOVANIO BOSCO CHU GOMES and RATNASARI, DESI (2016) PENGARUH PERUBAHAN SUHU PADA PROPERTI ADSORPSI DAN DESORPSI THERMOSENSITIVE NIPAM-co-DMAAPS GEL. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Gel adsorben yang memiliki kemampuan mengadsorpsi dan mendesorpsi ion secara simultan dengan perubahan suhu (temperature swing) dihasilkan melalui reaksi kopolimerisasi radikal bebas antara N-isopropylacrylamide (NIPAM), dan N,Ndimethyl( acrylamidopropyl)ammonium propane sulfonate (DMAAPS). NIPAM dipergunakan sebagai agen thermosensitive dan DMAAPS digunakan sebagai agen pengadsorpsi. Tujuan dari penelitian ini adalah untuk mempelajari pengaruh perubahan suhu terhadap properti swelling, adsorpsi, dan desorpsi ion pada thermosensitive NIPAM-co-DMAAPS gel dan hubungan antara properti-properti tersebut. NaNO3 dipergunakan sebagai larutan uji dalam mempelajari properti swelling, adsorpsi, dan desorpsi. Uji swelling dilakukan dengan mengukur diameter dari silinder gel pada keadaan kering dan setelah kontak dengan larutan NaNO3 selama 12 jam. Untuk uji adsorpsi dilakukan dengan memasukkan satu gram crush gel ke dalam 20 ml larutan NaNO3 pada berbagai konsentrasi dan suhu selama 12 jam yang disertai dengan pengadukan. Sedangkan uji desorpsi dilakukan dengan memasukkan gel yang diperoleh pada uji adsorpsi yang telah dikeringkan sebelumnya ke dalam distilled water selama 12 jam 1. Jovanio Bosco C. G. A. 2311 100 085 2. Desi Ratnasari 2311 100 105 1. Dr. Eva Oktavia Ningrum, ST., MS. 2. Prida Novarita Trisanti, ST., M.T. pada suhu yang ditetapkan disertai dengan pengadukan. Gel hasil adsorpsi dan desorpsi dipisahkan dari larutannya untuk mendapatkan konsentrasi larutan akhir, kemudian larutan ini dianalisa menggunakan Atomic Absorption Spectrophotometry (AAS) Dari hasil penelitian diketahui bahwa pada suhu tinggi, adsorpsi ion pada kopolimer gel nilainya rendah namun prosentase desorpsi dan nilai swelling degree cenderung tinggi. Nilai dari swelling degree, adsopsi, dan desorpsi ion pada kopolimer gel juga berbanding lurus terhadap konsentrasi larutan NaNO3 yang digunakan. Berdasarkan hubungan antara properti swelling dan adsorpsi dapat disimpulkan bahwa pada nilai swelling degree yang rendah, adsorpsi ion pada kopolimer gel menunjukkan nilai yang konstan. Namun dengan meningkatnya nilai swelling degree, adsorpsi ion cenderung menurun. ====================================================================================== Adsorbent gels with ability to adsorb and desorb ion simultaneously with temperature swing are synthesized by free radical copolymerization reaction of N-isopropylacrylamide (NIPAM) and N,N-dimethyl(acrylamidopropyl)ammonium propane sulfonate (DMAAPS). In this study, NIPAM acts as a thermosensitive agent and DMAAPS as an adsorbent agent. The purposes of this research are to investigate the effects of temperature on the swelling, adsorption and desorption behaviors of ion onto thermosensitive NIPAM-co-DMAAPS gel, and to study the relationship between these behaviors. NaNO3 solution was selected as the target solution and used in swelling, adsorption and desorption test. Swelling test was done by measuring diameter of the cylindrical gel after and before immersion in the NaNO3 solution for 12 hours. Adsorption test was carried out by introducing one gram grinded gels into 20 ml NaNO3 solution of desired concentration and temperature under stirring for 12 hours. Conversely, desorption test was performed by introducing the gels which were obtained from adsorption experiment and dried previously, into distilled water at the desired temperature and stirred gently for 12 hours. After adsorption and desorption, the gels were removed from the solution by centrifuge in order to measure the residual ion concentration in the solution. 1. Jovanio Bosco C. G. Amaral 2311 100 085 2. Desi Ratnasari 2311 100 105 1. Dr. Eva Oktavia Ningrum, ST., MS. 2. Prida Novarita Trisanti, ST., M.T. The concentrations of the solutions which were obtained from adsorption and desorption experiment were then analyzed by atomic Absorption Spectrophotometry (AAS). The swelling degree of the gels as measured by using millimeter block. The result revealed that at high temperature, the amount of ion adsorbed by the gels was low. On the contrary, the gel exhibited a high degree of swelling and high amount of ion desorbed by the gel. Moreover, higher concentration of NaNO3 resulting in the higher value of the swelling degree, adsorption and desorption ability. Based on the relationship between the swelling properties and adsorption properties, it can be concluded that at a lower degree of swelling, the amount of ion adsorbed onto copolymer gel showed a constant value. However, the amount of ion adsorbed decrease with further increasing the swelling degree.

Item Type: Thesis (Undergraduate)
Uncontrolled Keywords: thermosensitive, adsorpsi, desorpsi, swelling degree, thermosensitive, adsorption, desorption, swelling degree
Subjects: T Technology > TP Chemical technology > TP248 Nanogels. Nanoparticles.
Divisions: Faculty of Industrial Technology > Chemical Engineering > (S1) Undergraduate Theses
Depositing User: - Davi Wah
Date Deposited: 16 Jan 2017 06:14
Last Modified: 26 Dec 2018 03:08
URI: http://repository.its.ac.id/id/eprint/1610

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