Irine Sofianty, - (2023) SINTESIS DAN KARAKTERISASI HIDROGEL PVA/GA/POM/CNT, DAN UJI KINERJANYA SEBAGAI MATERIAL S-CRF NaCl DAN S-CRF KCl. S1 thesis, Universitas Pendidikan Indonesia.
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Abstract
ABSTRAK Upaya praktek pertanian ramah lingkungan telah banyak dilakukan untuk meningkatkan efektivitas pemupukan dan mengurangi dampaknya pada lingkungan. Penggunaan hidrogel sebagai material slow-controlled release fertilizer (S-CRF) dapat menjadi solusi dari permasalahan tersebut. Penelitian ini bertujuan untuk mengetahui kondisi optimum sintesis, karakterisasi, dan uji kinerja hidrogel dari polivinil alkohol (PVA), glutaraldehid (GA), Premna oblongifolia Merr (POM), dan carbon nanotubes (CNT). Tahapan penelitian terdiri atas (1) sintesis hidrogel PVA/GA/POM dan PVA/GA/POM/CNT; (2) karakterisasi gugus fungsi, morfologi, dan hidrofilitas; dan (3) kinerja hidrogel swelling ratio, water retention, porositas, absorpsi dan desorpsi ion natrium dan kalium. Konsentrasi PVA(%) optimum adalah 3% dengan komposisi volume optimum PVA/GA/POM adalah 15:7,5:15 dan PVA/GA/POM/CNT adalah 15:7,5:15:7. Sisa asam hidrogel dibersihkan dengan baik pada pencucian ketiga dan keempat. Spektra FTIR hidrogel PVA/GA/POM/CNT menunjukkan peningkatan dan pergeseran serapan gugus O-H, CH2, dan C-O-C. Foto SEM hidrogel PVA/GA/POM/CNT memiliki struktur yang lebih berpori dan kasar dibandingkan PVA/GA/POM. Hidrogel PVA/GA/POM/CNT memiliki sudut kontak lebih kecil yaitu 43,27o sedangkan PVA/GA/POM yaitu 48,27o. Hidrogel PVA/GA/POM/CNT memiliki swelling ratio lebih besar yaitu 1076% dibandingkan PVA/GA/POM yaitu 675%. Uji water retention pada jam ke-48 menunjukkan bahwa hidrogel PVA/GA/POM/CNT mampu mempertahankan air lebih banyak yaitu 3,39% sedangkan PVA/GA/POM yaitu 0,43%. Uji porositas hidrogel PVA/GA/POM/CNT memiliki kapasitas absorbsi lebih besar yaitu 76,71% daripada PVA/GA/POM yaitu 66,85%. Uji absorpsi mengindikasikan bahwa semakin besar konsentrasi larutan NaCl dan KCl maka semakin besar ion yang terabsorpsi dan absorpsi hidrogel terhadap KCl lebih besar dibandingkan NaCl. Hidrogel PVA/GA/POM/CNT mendesorpsi NaCl dan KCl lebih besar dibandingkan PVA/GA/POM dan desorpsi KCl lebih cepat daripada NaCl. Kata Kunci : slow-controlled release fertilizer, polivinil alkohol, POM, CNT, glutaraldehid. ABSTRACT Efforts to practice eco-friendly agriculture have been carried out to increase the effectiveness of fertilization and reduce its impact on the environment. The use of hydrogel as a slow-controlled release fertilizer (S-CRF) material can be a solution to this problem. This study aims to determine the optimum conditions for synthesis, characterization, and hydrogel performance tests of polyvinyl alcohol (PVA), glutaraldehyde (GA), Premna oblongifolia Merr (POM), and carbon nanotubes (CNT). The research stages consisted of (1) synthesis of PVA/GA/POM and PVA/GA/POM/CNT hydrogels; (2) characterization of functional groups, morphology and hydrophilicity; and (3) hydrogel performance test consists of swelling ratio, water retention, porosity, absorption and desorption of sodium and potassium ions. The optimum concentration of PVA(%) is 3% with the optimum volume (mL) composition of PVA/GA/POM is 15:7,5:15 and PVA/GA/POM/CNT is 15:7,5:15:7. Residual hydrogel acid was removed well in the third and fourth washes. The FTIR spectra of PVA/GA/POM/CNT hydrogels show increases and shifts in the absorption of the O-H, CH2, and C-O-C groups. SEM photo of PVA/GA/POM/CNT hydrogel has more porous and rough structure than PVA/GA/POM. PVA/GA/POM/CNT hydrogel has a smaller contact angle of 43.27o while PVA/GA/POM is 48.27o. PVA/GA/POM/CNT hydrogel has a greater swelling ratio of 1076% compared to PVA/GA/POM which is 675%. The results of water retention test at 48 hours shows that the PVA/GA/POM/CNT hydrogel is able to retain more water, namely 3.39%, while PVA/GA/POM is 0.43%. The PVA/GA/POM/CNT hydrogel porosity test has greater absorption capacity of 76.71% than PVA/GA/POM which is 66.85%. The absorption test indicated that the greater the concentration of NaCl and KCl solutions, the greater the adsorbed ions and the hydrogel absorption of KCl is greater than that of NaCl. PVA/GA/POM/CNT hydrogels desorps NaCl and KCl more than PVA/GA/POM and KCl desorption faster than NaCl. Keywords : slow-controlled release fertilizer, polyvinyl alcohol, POM, CNT, glutaraldehyde.
| Item Type: | Thesis (S1) |
|---|---|
| Additional Information: | Link Google Scholar https://scholar.google.com/citations?user=hVGiDq8AAAAJ&hl=en&oi=ao ID SINTA Dosen Pembimbing: Hendrawan : 5994163 Fitri Khoerunnisa : 258263 |
| Uncontrolled Keywords: | slow-controlled release fertilizer, polivinil alkohol, POM, CNT, glutaraldehid. |
| Subjects: | Q Science > Q Science (General) Q Science > QD Chemistry |
| Divisions: | Fakultas Pendidikan Matematika dan Ilmu Pengetahuan Alam > Jurusan Pendidikan Kimia > Program Studi Kimia (non kependidikan) |
| Depositing User: | Irine Sofianty |
| Date Deposited: | 19 Sep 2023 02:55 |
| Last Modified: | 19 Sep 2023 02:55 |
| URI: | http://repository.upi.edu/id/eprint/105534 |
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