Diah Indriati, - (2023) SINTESIS, KARAKTERISASI, DAN UJI PERFORMA HIDROGEL PVA/Premna oblongifolia Merr./GA/CHARCOAL SEBAGAI CRF UNTUK NUTRIEN KALIUM KLORIDA. S1 thesis, Universitas Pendidikan Indonesia.
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Abstract
Penyisipan CNT ke dalam matriks hidrogel PVA/POM/GA (PPG) mampu menambah kekuatan sifat mekanik dan kemampuan akomodasi terhadap air. Namun, harganya yang tinggi penggunaan CNT untuk kepentingan praktis pengembangan CRF menjadi kurang menjanjikan sehingga dicari material lain yang memberikan sifat gel relatif sama dengan harga murah dan memungkinkan untuk dikembangkan menjadi CRF pertanian. Selain kelas CNT terdapat bio-charcoal, yang pada tingkat tertentu memiliki sifat yang serupa yaitu mampu terdispersi baik didalam gel. Secara praktis charcoal (C) memberikan peluang lebih besar karena kemudahannya dalam pembuatan dan harganya yang murah. Tujuan penelitian ini adalah menentukan komposisi optimum charcoal sebagai pengganti CNT terhadap matrik hidrogel, menentukan karakteristik material dan uji performa hidrogel hasil sintesis baik sebelum atau sesudah ditambahkan charcoal sebagai CRF untuk nutrient KCl. Pada sintesis PPG digunakan perbandingan 1:1:1 dan terdapat penambahan CNT sebanyak 7 mL. Berdasarkan parameter swelling ratio, volume C sebanyak 1 mL memberikan kondisi paling optimum (SR 509,6%). Karakterisasi gugus fungsi hidrogel terlihat adanya perubahan intensitas serapan pada gugus fungsi O-H,C-H sp^3,C=O,dan C-O saat penambahan CNT dan charcoal. Karakterisasi morfologi menunjukan hidrogel PPG-C memiliki pori lebih kecil dari PPG-CNT. Karakterisasi jarak antar lapisan menunjukan 0,4535 nm PPG-C1 dan 0,4413 nm PPG-CNT. Kemampuan hidrofilisitas menunjukan bahwa PPG-C1 > PPG-CNT > PPG. PPG-C1 memiliki swelling ratio yang hampir sama dengan PPG-CNT (509,6% dan 534,7%). PPG-C memiliki water retention lebih besar dari PPG-CNT. Kajian sorpsi menunjukan loading behavior KCl oleh PPG-C1 lebih lambat dari PPG-CNT, dan release KCl dari dalam PPG-C1 lebih cepat dari PPG-CNT. The preparation of CNT into the PVA/POM/GA (PPG) hydrogel matrix was able to increase the strength of the mechanical properties and low ability to air. However, the high use of CNTs for practical purposes in CRF development has become less promising, so we are looking for other materials that provide relatively the same gel properties at low prices and make it possible to develop them into agricultural CRFs. Apart from the CNT class, there are bio-charcoal, which to a certain extent have similar properties, namely being able to disperse well in gel. Practically charcoal (C) provides greater opportunities because of its ease of manufacture and low price. The aim of this research is to determine the optimum composition of charcoal as a substitute for CNT in the hydrogel matrix, determine the characteristics of the material and test the performance of the synthesized hydrogel either before or after adding charcoal as CRF for KCl nutrition. In the PPG synthesis, a ratio of 1:1:1 was used and 7 mL of CNT was added. Based on the development ratio parameters, a C volume of 1 mL provides the most optimal conditions (SR 509.6%). Characterization of the hydrogel functional groups shows that there is a change in the absorption intensity of the O-H, C-H sp^3, C=O, and C-O functional groups when CNT and charcoal are added. Morphological characterization shows that PPG-C hydrogel has smaller pores than PPG-CNT. Characterization of the interlayer distance shows 0.4535 nm PPG-C1 and 0.4413 nm PPG-CNT. The hydrophilicity ability shows that PPG-C1 > PPG-CNT > PPG. PPG-C1 has almost the same swelling ratio as PPG-CNT (509.6% and 534.7%). PPG-C has greater water retention than PPG-CNT. Sorption studies show that the KCl loading behaviour by PPG-C1 is slower than PPG-CNT, and the release of KCl from PPG-C1 is faster than PPG-CNT.
| Item Type: | Thesis (S1) |
|---|---|
| Additional Information: | Link Google Scholar: https://scholar.google.com/citations?view_op=list_works&hl=id&user=Z2VkxdUAAAAJ&gmla=AOV7GLO57a1rSrVQwB9EVR5aZJMA0F8kZ3vs_rXwQR99LBq0Q8gcRWKkWd_6Na3xFMsfRXnBB_iySXh6bq65CzyNG5CcTDQWXxTvQpSpf0br_PEzftm3 ID SINTA DOSEN PEMBIMBING: Hendrawan: 5994163 Hafiz Aji Aziz: 6748855 |
| Uncontrolled Keywords: | Controlled-release fertilizer, CNT, Charcoal, GA, PVA, POM, KCl |
| Subjects: | Q Science > QD Chemistry |
| Divisions: | Fakultas Pendidikan Matematika dan Ilmu Pengetahuan Alam > Jurusan Pendidikan Kimia > Program Studi Kimia (non kependidikan) |
| Depositing User: | Diah Indriati |
| Date Deposited: | 17 Sep 2023 09:32 |
| Last Modified: | 17 Sep 2023 09:32 |
| URI: | http://repository.upi.edu/id/eprint/101806 |
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