SINTESIS DAN KARAKTERISASI MEMBRAN NANOKOMPOSIT PES/PEG/PVA/SiO2

• Main Author: Silvia Widiyanti, - (Author)
• Format: Book
• Published: 2021-08-30.
• Subjects: Thesis; NonPeerReviewed
• Online Access: Link Metadata
• Notes: http://repository.upi.edu/68068/1/S_KIM_1705675_Title.pdf; http://repository.upi.edu/68068/2/S_KIM_1705675_Chapter1.pdf; http://repository.upi.edu/68068/3/S_KIM_1705675_Chapter2.pdf; http://repository.upi.edu/68068/4/S_KIM_1705675_Chapter3.pdf; http://repository.upi.edu/68068/5/S_KIM_1705675_Chapter4.pdf; http://repository.upi.edu/68068/6/S_KIM_1705675_Chapter5.pdf; http://repository.upi.edu/68068/7/S_KIM_1705675_Appendix.pdf
• Keywords: QD Chemistry

Abstrak Penelitian ini bertujuan untuk memperoleh informasi mengenai metode sintesis dan karakteristik membran komposit PES/PEG/ PVA/SiO2. Membran komposit disintesis melalui metode inversi fasa dengan komposisi (% w/w) PES (17,25), PVA (3,58; 0,85; 1,43; 2,57; 3,57) PEG (3,72), SiO2 (0,35; 0,85; 1,43; 2,57; 3,57), dan pelarut DMAc. Membran komposit hasil sintesis dikarakterisasi menggunakan FTIR spektroskopi, difraksi X-ray, Scanning Electron Microscopy (SEM), dan water contact angle. Hasil penelitian menunjukkan bahwa interaksi antara PES, PVA, dan SiO2 diindikasikan dengan serapan khas spektrum FTIR pada bilangan gelombang 1104 cm-1 untuk vibrasi Si-O-Si, 954 cm-1 untuk vibrasi Si-OH, 1292 cm-1 untuk vibrasi O=S=O dan serapan 3442 cm-1 untuk regangan O-H. Foto penampang melintang (cross-section) SEM menunjukkan bahwa penambahan PVA dan SiO2 menyebabkan perubahan morfologi dan struktur pori membran PES yang signifikan. Hasil difraktogram sinar X (X-Ray) menunjukkan adanya pergeseran pada puncak dari 13,15o o menjadi 14,21; 16,66o menjadi 17,03o dan 18,47o menjadi 18,85o dan ditemukannya puncak serapan baru setelah membran dimodifikasi yaitu pada puncak serapan 31,07o . Selain itu kristalisnitas membran pun naik dari 31,32% menjadi 46,62% yang mengindikasikan keberhasilan sintesis membran komposit. Penambahan PEG/PVA/SiO2 juga meningkatkan hidrofilisitas membran komposit, dimana membran komposit MPS-1 memiliki hidrofilitas tertinggi dengan rata-rata sudut kontak (contact angle) sebesar 62,16o . Berdasarkan temuan tersebut, dapat disimpulkan bahwa membran komposit PES/PEG/PVA/SiO2 telah berhasil disintesis melalui metode inversi fasa dengan komposisi optimum PES: PEG: PVA: SiO2 yaitu 17,25%: 3,72%: 0,85%: 0,35%. Penambahan PEG/PVA/SiO2 meningkatkan hidrofilisitas dan memodifikasi struktur morfologi membran PES. Pengukuran porositas, sifat mekanik dan aplikasi membran komposit PES/PEG/PVA/SiO2 sebagai membran filtrasi dalam pengolahan air perlu dikaji lebih lanjut. Kata kunci: Membran komposit, PES/PEG/PVA/SiO2, sintesis, karakterisasi abstract This study aims to obtain information on the synthesis method and characteristics of PES/PEG/PVA/SiO2 composite membranes. Composite membranes were synthesized by phase inversion method with composition (% w/w) PES (17.25), PVA (3.58; 0.85; 1.43; 2.57; 3.57) PEG (3.72) , SiO2 (0.35; 0.85; 1.43; 2.57; 3.57), and DMAc solvent. The synthesized composite membranes were characterized using FTIR spectroscopy, X-ray diffraction, Scanning Electron Microscopy (SEM), and water contact angle. The results showed that the interaction between PES, PVA, and SiO2 was indicated by the typical absorption spectrum of the FTIR at wave numbers 1104 cm-1 for the Si-O-Si vibration, 954 cm-1 for the Si-OH vibration, 1292 cm¬-1 for the Si-OH vibration. O=S=O and absorption is 3442 cm-1 for the OH strain. SEM cross-sectional photos showed that the addition of PVA and SiO2 caused significant changes in the morphology and pore structure of the PES membrane. The results of the X-ray diffractogram (X-Ray) showed a shift in the peak from 13.15o to 14.21; 16.66o to 17.03o and 18.47o to 18.85o and a new absorption peak was found after the membrane was modified, namely at 31.07o absorption peak which indicated the success of composite membrane synthesis. Besides, the cristallinity of composite membrane increase from 31,32% to 46,62%. The addition of PEG/PVA/SiO2 also increased the hydrophilicity of the composite membrane, where the MPS-1 composite membrane had the highest hydrophilicity with an average contact angle of 62.16o . Based on these findings, it can be concluded that the PES/PEG/PVA/SiO2 composite membrane has been successfully synthesized through the phase inversion method with the optimum composition of PES: PEG: PVA: SiO2 ie 17.25%: 3.72%: 0.85%: 0 ,35%. The addition of PEG/PVA/SiO2 increased the hydrophilicity and modified the morphological structure of the PES membrane. Measurement of porosity, mechanical properties and applications of PES/PEG/PVA/SiO2 composite membranes as filtration membranes in water treatment need to be studied further. Keywords: Composite membrane, PES/PEG/PVA/SiO2, synthesis, characterization