Zuhdan, Muhammad Jayyid (2023) Pengembangan Proses Ramah Lingkungan Melt-Solid Polycondensation Sebagai Metode Sintesis Bioplastik Asam Polilaktat (PLA) Menggunakan Katalis Asan Lewis-Surfaktan Terkombinasi. Masters thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Penelitian ini bertujuan untuk membuat preparasi LASC (Lewis Acid Surfactant-Combined Catalyst) yang merupakan katalis tahan air dengan menggabungkan logam Lewis (Fe3+, Al3+, dan Cu2+) dan surfaktan SDS (Sodium Dodecyl Sulfate) yang selanjutnya dilihat kinerjanya pada produksi PLA (Asam Polilaktat) dan penambahan p-TSA (p-Toluene Sulfonic Acid) sebagai anti-decolorization agent serta penambahan ESBO (epoxidized soybean oil) sebagai branching agent pada metode MSP (Melt-Solid Polycondensation) untuk meningkatkan BM (Berat Molekul) dan elastisitasnya. Tahapan metode diawali dengan (a) preparasi LASC; (b) produksi PLA melalui metode DP (Direct-Polycondensation) dengan penambahan LASC dan p-TSA yang dilakukan pada suhu 160 ºC dan 180 ºC selama 8 jam (20 kPa); (c) tahap MSP untuk meningkatkan BM pada suhu 150 ºC dan waktu selama 15 jam (20 kPa). Katalis dikarakterisasi dengan XRD (X-Ray Powder Diffraction), TGA (Thermogravimetric Analysis), dan FTIR (Fourier-Transform Infrared Spectroscopy). Sedangkan PLA dianalisis menggunakan GPC (Gel Permeation Chromatography), h-NMR (Nuclear Magnetic Resonance), XRD, dan FTIR. Penambahan ¬p-TSA pada proses DP berpengaruh pada penurunan docolorization pada variabel Al(DS)3 [Al(Dodecyl Sulfate)3] dan Fe(DS)3, sementara pada Cu(DS)2 tidak berpengaruh. Hasil terbaik pada penelitian ini, terdapat pada variabel Al(DS)3 pada suhu 180 ºC dengan berat molekul sebesar 74,300 g/mol, tensile strength sebesar 0,52 MPa dan elongation sebesar 40,17%. Tingginya berat molekul dan warna yang baik dari variabel Al(DS)3 dikarenakan sifat oksidatif dari Al yang rendah dan kemampuan penyerapan air yang tinggi. Dimana pada analisa TGA, Al(DS)3 memiliki kehilangan %weight air tertinggi dengan sisa %weight diatas 200 ºC sebesar 63,58%.
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This study aims to prepare the preparation of LASC (Lewis Acid Surfactant-Combined Catalyst), which is a water-resistant catalyst by combining Lewis metals (Fe3+, Al3+, and Cu2+) and SDS (Sodium Dodecyl Sulfate) surfactant, which is then examined for its performance in the production of PLA (Polylactic Acid). ) and the addition of p-TSA (p-Toluene Sulfonic Acid) as an anti-decolorization agent and the addition of ESBO (epoxidized soybean oil) as a branching agent in the MSP (Melt-Solid Polycondensation) method to increase Molecular Weight (Molecular Weight) and elasticity. The method steps begin with (a) LASC preparation; (b) production of PLA using the DP (Direct-Polycondensation) method with the addition of LASC and p-TSA which was carried out at 160 ºC and 180 ºC for 8 hours (20 kPa); (c) the MSP step to increase the BM at 150 ºC and a time of 15 hours (20 kPa). The catalysts were characterized by XRD (X-Ray Powder Diffraction), TGA (Thermogravimetric Analysis), and FTIR (Fourier-Transform Infrared Spectroscopy). Meanwhile, PLA was analyzed using GPC (Gel Permeation Chromatography), h-NMR (Nuclear Magnetic Resonance), XRD, and FTIR. The addition of ¬p-TSA in the DP process had an effect on decreasing docolorization of Al(DS)3 [Al(Dodecyl Sulfate)3] and Fe(DS)3, while it had no effect on Cu(DS)2. The best results in this study were found in the variable Al(DS)3 at 180 ºC with a molecular weight of 74.300 g/mol, a tensile strength of 0.52 MPa and an elongation of 40.17%. The high molecular weight and good color of variable Al(DS)3 is due to the low oxidative properties of Al and high water absorption ability. Where in the TGA analysis, Al(DS)3 has the highest % water weight loss with the remaining % weight above 200 ºC of 63.58%.
| Item Type: | Thesis (Masters) |
|---|---|
| Uncontrolled Keywords: | LASC, ESBO, Polylactic Acid, Polycondensation, p-TSA |
| Subjects: | T Technology > TP Chemical technology > TP1140 Polymers |
| Divisions: | Faculty of Industrial Technology and Systems Engineering (INDSYS) > Chemical Engineering > 24101-(S2) Master Thesis |
| Depositing User: | Muhammad Jayyid Zuhdan |
| Date Deposited: | 13 Feb 2023 03:22 |
| Last Modified: | 13 Feb 2023 03:22 |
| URI: | http://repository.its.ac.id/id/eprint/96994 |
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