#TITLE_ALTERNATIVE#

• Main Author: PRAMA EKAPUTRA (NIM : 20211309) ; Pembimbing Prof. Dr.Eng. Khairurrijal , Dr. Eng. Muhammad , MUHAMAD
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/18958
• Institution: Institut Teknologi Bandung

Nanofibrous membrane based on Polyacrylonitrile (PAN) for water purification <br /> <br /> <br /> <br /> <br /> <br /> <br /> application has been successfully synthesized in this study. The membrane was <br /> <br /> <br /> <br /> <br /> <br /> <br /> synthesized by using electrospinning technique. This technique has advantages in <br /> <br /> <br /> <br /> <br /> <br /> <br /> terms of processing, effectiveness, production scale (both small scale and industrial <br /> <br /> <br /> <br /> <br /> <br /> <br /> scale), and controlling of nanofiber. The superiorities of nanofibrous membrane <br /> <br /> <br /> <br /> <br /> <br /> <br /> produced by electrospinning are its high porosity, interconnected porous system, <br /> <br /> <br /> <br /> <br /> <br /> <br /> allowing good permeability and filtering performance. The concentration of PAN <br /> <br /> <br /> <br /> <br /> <br /> <br /> solution used in electrospinning method was varied at 6, 8, and 10 percent by <br /> <br /> <br /> <br /> <br /> <br /> <br /> weight.The membrane yielded was characterized by Scanning Electron Microscopy <br /> <br /> <br /> <br /> <br /> <br /> <br /> (SEM) in order to assess the morphology and diameter. Evaluation of membrane <br /> <br /> <br /> <br /> <br /> <br /> <br /> included flux test and filtration efficiency analysis towards suspension containing <br /> <br /> <br /> <br /> <br /> <br /> <br /> solid particles (as antacid) and bacterial suspension of P. Aeruginosa and S. <br /> <br /> <br /> <br /> <br /> <br /> <br /> Epidermidis, with respective concentration of 3.02 × 107 sel/ml and 2.89 × 107 sel/ml. <br /> <br /> <br /> <br /> <br /> <br /> <br /> All evaluation performed in this study was compared with membrane filter for High <br /> <br /> <br /> <br /> <br /> <br /> <br /> Performance Liquid Chromatography (HPLC) solvent as a control membrane. In <br /> <br /> <br /> <br /> <br /> <br /> <br /> order to evaluate the degree of purity of the filtrate,the concentration of solid particle <br /> <br /> <br /> <br /> <br /> <br /> <br /> and bacteria were determined prior to and after filtration using spectrophotometry (for <br /> <br /> <br /> <br /> <br /> <br /> <br /> antacid) and hemocytometry (for bacteria). PAN membrane with the most optimum <br /> <br /> <br /> <br /> <br /> <br /> <br /> characteristics was then developed further as nanofibrous membrane with atibacterial <br /> <br /> <br /> <br /> <br /> <br /> <br /> activity by electrospinning with addition of chitosan to the structure. The mixture of <br /> <br /> <br /> <br /> <br /> <br /> <br /> PAN and chitosan was varied with mass ratio at 10:1, 10:1, dan 5:1. SEM analysis <br /> <br /> <br /> <br /> <br /> <br /> <br /> showed fine and uniform strands of PAN fiber with diameter ranging from 270 to 310 <br /> <br /> <br /> <br /> <br /> <br /> <br /> nm for 6 weight percent, 290 – 370 nm for 8 weight percent, and 440 – 540 nm for 10 <br /> <br /> <br /> <br /> <br /> <br /> <br /> weight percent. Addition of chitosan into PAN membrane resulted in the formation of <br /> <br /> <br /> <br /> <br /> <br /> <br /> beads scattered within the strands of fiber. Analysis of filtration efficiency <br /> <br /> <br /> <br /> <br /> <br /> <br /> demonstrated reduction of bacterial and particle concentration following fitration <br /> <br /> <br /> <br /> <br /> <br /> <br /> using all the membranes. Significant reduction was observed in filtration using pure <br /> <br /> <br /> <br /> <br /> <br /> <br /> PAN membrane at 8 weight percent, with filtration efficiency of 94.56 - 99.48 %. <br /> <br /> <br /> <br /> <br /> <br /> <br /> Absorbance of filtrate of antacid suspensions at 322 nm was negligible, indicating <br /> <br /> <br /> <br /> <br /> <br /> <br /> that almost all the particles were removed. However, filtrate yielded from filtration <br /> <br /> <br /> <br /> <br /> <br /> <br /> using PAN membrane 10 weight percent contained 29.35 ppm of antacid particles. <br /> <br /> <br /> <br /> <br /> <br /> <br /> Incorporation of chitosan into PAN nanofibrous membrane affected flux profiles. <br /> <br /> <br /> <br /> <br /> <br /> <br /> Furthermore, PAN/Chitosan membrane demonstrated antibacterial activity. The <br /> <br /> <br /> <br /> <br /> <br /> <br /> lowest rate of bacterial growth was observed in membrane with the highest <br /> <br /> <br /> <br /> <br /> <br /> <br /> Chitosan/PAN ratio. In summary, characterization and membrane evaluation <br /> <br /> <br /> <br /> <br /> <br /> <br /> v <br /> <br /> <br /> <br /> <br /> <br /> <br /> indicated that nanofibrous membrane based on PAN with 8 weight percent was <br /> <br /> <br /> <br /> <br /> <br /> <br /> highly potential for application as filtration medium for water effectively and <br /> <br /> <br /> <br /> <br /> <br /> <br /> efficiently.