Helmi Nurapriliansyah, - (2024) SINTESIS, KARAKTERISASI, DAN UJI PERFORMA PVA/BORAT/POM SEBAGAI MATERIAL SLOW/CONTROLLED-RELEASE FERTILIZER KCl. S1 thesis, Universitas Pendidikan Indonesia.
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Abstract
Untuk kepentingan pelaksanaan praktik pertanian yang efektif dan ramah lingkungan telah dikembangkan berbagai pendekatan pengembangan pupuk, yang diantaranya adalah Slow/Controlled-Release Fertilizer (S/CRF). Pada praktiknya, pengembangan S/CRF sering melibatkan material yang disebut dengan istilah hidrogel baik yang bersumber dari bahan sintetis, alam, ataupun campuran keduanya. Kajian terhadap hidrogel PVA/Borat sebagai material S/CRF menunjukkan bahwa gel tersebut masih mudah rusak. Penambahkan filler seperti Premna oblongifolia Merr. terbukti dapat meningkatkan stabilitas mekanik pada hidrogel. Penelitian ini bertujuan untuk menentukan komposisi optimum penambahan POM, mengetahui karakteristik hidrogel PVA/Borat/POM, serta performa lembaran hidrogel dan granula. Penelitian dilakukan dalam beberapa tahap, yaitu (1) optimasi komposisi dari sintesis lembaran hidrogel PVA/Borat/POM, serta sintesis lembaran PVA/Borat/POM dan granula CaCO3-KCl terlapisi; (2) karakterisasi menggunakan FTIR, SEM, dan water contact angle dari lembaran hidrogel PVA/Borat/POM; (3) uji performa agrokimia dari lembaran dan granula. Merujuk ke nilai parameter swelling ratio, water retention, dan water contact angle yang lebih unggul dibandingkan komposisi lainnya, maka hidrogel PVA/Borat dengan penambahan POM 15mL yang diproses lebih lanjut. FTIR menunjukkan adanya ikatan O-H, C-H sp3, C=O, B-O, C-O, dan C-C pada kedua hidrogel, dan tidak ditemukan kemunculan atau kehilangan gugus fungsi baru. SEM memperlihatkan pemotretan secara cross sectional membuat lapisan (alur) menjadi lebih banyak. Water contact angle menunjukkan penambahan POM menurunkan hidrofilisitas. Swelling ratio menunjukkan penambahan POM meningkatkan nilai %SR. Water retention menunjukkan penambahan POM menurunkan nilai %WR. Uji biodegradabilitas menunjukkan hidrogel PVA/Borat/POM lebih biodegradabilitas, dibandingkan PVA/Borat. Uji release behavior lembaran menunjukkan bahwa hidrogel PVA/Borat/POM memiliki nilai konduktivitas release KCl yang lebih tinggi, dibandingankan hidrogel PVA/Borat. Pelapisan granula CaCO3-KCl dengan gel PVA/Borat/POM mampu menurunkan laju release KCl, dibandingkan dengan granula CaCO3-KCl tanpa pelapisan. In the interest of implementing effective and environmentally friendly agricultural practices, various approaches to fertilizer development have been developed, including Slow/Controlled-Release Fertilizer (S/CRF). In practice, the development of S/CRF often involves materials referred to as hydrogels whether sourced from synthetic, natural, or a mixture of both. Studies on PVA/Borate hydrogels as S/CRF materials show that the gel is still easily damaged. The addition of fillers such as Premna oblongifolia Merr. has been shown to improve the mechanical stability of hydrogels. This study aims to determine the optimum composition of POM addition, determine the characteristics of PVA/Borate/POM hydrogels, and the performance of hydrogel sheets and granules. The research was conducted in several stages, namely (1) composition optimization of the synthesis of PVA/Borate/POM hydrogel sheets, as well as the synthesis of PVA/Borate/POM sheets and coated CaCO3-KCl granules; (2) characterization using FTIR, SEM, and water contact angle of PVA/Borate/POM hydrogel sheets; (3) agrochemical performance testing of sheets and granules. Referring to the superior values of swelling ratio, water retention, and water contact angle parameters compared to other compositions, the PVA/Borate hydrogel with 15mL POM addition was processed further. FTIR showed the presence of O-H, C-H sp3, C=O, B-O, C-O, and C-C bonds in both hydrogels, and no appearance or loss of new functional groups. SEM shows that cross sectional shooting makes the layers (grooves) become more numerous. Water contact angle showed the addition of POM decreased hydrophilicity. Swelling ratio shows the addition of POM increases the %SR value. Water retention showed the addition of POM decreased the %WR value. Biodegradability test showed that PVA/Borate/POM hydrogel is more biodegradable than PVA/Borate. Sheet release behavior test showed that PVA/Borate/POM hydrogel has a higher KCl release conductivity value, compared to PVA/Borate hydrogel. Coating CaCO3-KCl granules with PVA/Borate/POM gel was able to reduce the release rate of KCl, compared to CaCO3-KCl granules without coating.
| Item Type: | Thesis (S1) |
|---|---|
| Additional Information: | https://scholar.google.com/citations?user=hYPwAqMAAAAJ&hl=id SINTA ID Hendrawan: 5994163 SINTA ID Hafiz Aji Aziz: 6748855 |
| Uncontrolled Keywords: | S/CRF, hidrogel, PVA/Borat/POM, Premna oblongifolia Merr.; hydrogel |
| Subjects: | L Education > L Education (General) |
| Divisions: | Fakultas Pendidikan Matematika dan Ilmu Pengetahuan Alam > Jurusan Pendidikan Kimia > Program Studi Kimia (non kependidikan) |
| Depositing User: | Helmi Nurapriliansyah |
| Date Deposited: | 13 Sep 2024 07:39 |
| Last Modified: | 13 Sep 2024 07:39 |
| URI: | http://repository.upi.edu/id/eprint/124559 |
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