Ratnasari, Anisa (2026) Efektivitas Zwitterion Pada Permukaan Membran Polyvinylidene Difluoride Untuk Rejeksi Garam Air Payau. Doctoral thesis, Institut Teknologi Sepuluh Nopember.
![[thumbnail of 7014221003-Doctoral.pdf]](http://repository.its.ac.id/style/images/fileicons/text.png) |
Text
7014221003-Doctoral.pdf - Accepted Version Restricted to Repository staff only Download (38MB) | Request a copy |
Abstract
Teknologi membran polyvinylidene difluoride (PVDF) termodifikasi merupakan teknik alternatif untuk proses desalinasi guna mencegah kelangkaan, menjaga ketersediaan, dan memenuhi kebutuhan air bersih sesuai dengan tujuan Pembangunan berkelanjutan (SDGs). Teknologi membran PVDF yang dimodifikasi oleh zwitterion menjadi teknik yang menjanjikan dalam pengolahan air karena menghasilkan hidrofilisitas yang lebih baik, sifat anti-fouling, hemokompatibilitas yang lebih baik, teknik yang sederhana dan terjangkau. Zwitterion yang bermuatan positif dan negatif dapat diaplikasikan pada permukaan membran untuk meningkatkan efektivitas kemampuan dalam proses rejeksi garam dari air payau. Oleh sebab itu, tujuan studi ini adalah untuk mengevaluasi membran PVDF termodifikasi zwitterion pada proses desalinasi air payau. PVDF termodifikasi zwitterion disintesis menggunakan metode free radical polymerization. PVDF-zwitterion dimodifikasi secara immersion dengan variasi konsentrasi TA 5 g/L (M50X), TA 5 g/L-DEDA 1 g (M51X), dan TA 5 g/L-DEDA 3 g (M53X). Modifikasi permukaan akan dievaluasi menggunakan FESEM-EDS untuk memastikan zwitterion telah berada di permukaan membran. Beberapa karakteristik membran termasuk hidrofilisitas, topologi permukaan, kandungan unsur, dan kemampuan rejeksi untuk larutan garam dan air payau asli dievaluasi. Kemampuan rejeksi PVDF-zwitterion dievaluasi dengan menggunakan aliran crossflow. Pengaruh variasi konsentrasi zwitterion dan waktu sintesis 6,8,10, dan 12 jam juga dianalisis terhadap hasil rejeksi. Hasil menunjukkan bahwa membran PVDF-zwitterion mampu merejeksi garam air payau mencapai 28,67%. Selain itu, kemampuan rejeksi sebesar 21,42%, 18,63%, dan 18,32% dipengaruhi oleh variasi ketebalan sebesar 127,68, 126,11, dan 125,20 m untuk membran M536, M516, dan M506. Kemampuan rejeksi sebesar 21,42%, 27,05%, 27,80%, dan 28,67% dipengaruhi oleh variasi waktu sintesis selama 6, 8, 10, dan 12 jam untuk membran M536, M538, M5310, dan M512 dengan rekomendasi waktu terbaik 12 jam. Hasil studi menunjukkan model machine learning terbaik untuk mengevaluasi kemampuan rejeksi membran, yaitu extreme gradient boosting (XGBoost) dengan Rsquare, RMSE, MSE, MAE, dan MAPE sebesar 0,995, 0,229, 0,052, 0,164, dan 0,71% untuk garam NaCl. Hasil yang sama juga diperoleh untuk proses rejeksi garam air payau secara berurutan sebesar 0,993, 0,247, 0,061, 0,184, dan 0,88%. Studi berperan strategis untuk menjaga ketersediaan, mengurangi stres, dan mengatasi kesulitan akses air.
==============================================================================================================================
The technology of modified polyvinylidene difluoride (PVDF) membrane is an alternative technique for desalination process to prevent scarcity, maintain availability, and meet the demand for clean water according to the Sustainable Development Goals (SDGs). The technology of PVDF membrane modified by zwitterion is a promising technique in water treatment because it produces better hydrophilicity, anti-fouling properties, better hemocompatibility, simple and affordable technique. Zwitterions that have positively and negatively charged can be applied to the surface of the membrane to increase the effectiveness of the membrane performance in rejection process of salt ions from brackish water. Therefore, the objective of this study was to evaluate zwitterion-modified PVDF membranes in the brackish water desalination process. Zwitterion-modified PVDF was synthesized using the free radical polymerization method. PVDF-zwitterion was immersion-modified with varying concentrations of TA 5 g/L (M50X), 5 g/L-DEDA 1 g (M51X), and TA 5 g/L-DEDA 3 g (M53X). Surface modification was evaluated using FESEM-EDS to ensure the zwitterion was present on the membrane surface. Several membrane characteristics, including hydrophilicity, surface topology, element content, and rejection performance for salt solutions and native brackish water, were evaluated. The rejection performance of PVDF-zwitterion was evaluated using crossflow. The effects of varying zwitterion concentration and synthesis time 6, 8, 10, and 12 hours on rejection results were also analysed. The results showed that the PVDF-zwitterion membrane could reject up to 28,67% of brackish water salt. In addition, the rejection capabilities of 21,42%, 18,63%, and 18,32% were influenced by thickness variations of 127,68, 126,11, and 125,20 m for M536, M516, and M506 membranes. The rejection capabilities of 21,42%, 27,05%, 27,80%, and 28,67% were influenced by synthesis time variations of 6, 8, 10, and 12 hours for M536, M538, M5310, and M512 membranes with 12 hours as recommendation for the best synthesis time. The study results show that the best machine learning model for evaluating membrane rejection performance is extreme gradient boosting (XGBoost) with Rsquare, RMSE, MSE, MAE, and MAPE of 0,995, 0,229, 0,052, 0,164, and 0,71% for NaCl salt. Similar results were also obtained for the brackish water salt rejection process, respectively, at 0,993, 0,247, 0,061, 0,184, and 0,88%. This study plays a strategic role in maintaining availability, reducing stress, and overcoming difficulties in water access.
| Item Type: | Thesis (Doctoral) |
|---|---|
| Uncontrolled Keywords: | Membran, polyvinilydene difluoride, zwitterion, garam monovalensi, rejeksi garam |
| Subjects: | T Technology > TD Environmental technology. Sanitary engineering > TD430 Water--Purification. T Technology > TD Environmental technology. Sanitary engineering > TD479.3 Saline water conversion |
| Divisions: | Faculty of Civil, Environmental, and Geo Engineering > Environmental Engineering > 25001-(S3) PhD Theses |
| Depositing User: | Anisa Ratnasari |
| Date Deposited: | 28 Jul 2026 06:54 |
| Last Modified: | 28 Jul 2026 06:54 |
| URI: | http://repository.its.ac.id/id/eprint/138020 |
Actions (login required)
 |
View Item |