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VARIATION OF SOLVENT COMPOSITION EFFECT ON PERFORMANCE AND PHYSICOCHEMICAL PROPERTIES OF CELLULOSE ACETATE MEMBRANE Indarti, Dwi; Widayanti, Nanda; Neran, Neran
Jurnal ILMU DASAR Vol 13 No 1 (2012)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (479.462 KB) | DOI: 10.19184/jid.v13i1.631

Abstract

Performance Cellulose acetate (CA) were characterized by the variation of solvent composition (acetone and formic acid) with a mole ratio of 5/10; 6/9; 7/8; 8.7; and 9/6 and the addition of additives MSG 6%. Characterization was conducted on the membrane performance (flux, permeability coefficient,% rejection) and physicochemical properties include density test and analysis of membrane structure by FTIR. Membrane solvent variation results, 6/9 has the lowest density values. Results flux, permeability coefficient and the highest rejection is obtained when the composition of the 9/6. FTIR test results showed no difference between the polymer cellulose acetate cellulose acetate membrane solvent variation results.
PEMANFAATAN MIKROKONTROLER DALAM PENGEMBANGAN INSTRUMEN UKUR KONDUKTIFITAS UNTUK ANALISIS KUALITAS AIR Surya Primaswara, Alfisa; Neran, Neran; Siswoyo, Siswoyo
BERKALA SAINSTEK Vol 4 No 1 (2016)
Publisher : Universitas Jember

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Abstract

Salah satu upaya pemantauan kualitas air adalah dengan melakukan analisis terhadap konduktifitas atau daya hantar listrik dari sampel air. Saat ini alat ukur yang banyak digunakan masih berasal dari pabrikan dengan harga yang relatif mahal sehingga ketersediannya dalam laboratorium universitas sangat terbatas dan sangat tergantung dari pabrikan dimaksud. Penelitian ini bertujuan untuk mengembangkan instrumen pengukur konduktifitas air dengan memanfaatkan mikrokontroller dan mengintegrasikannya dengan sensor daya hantar listrik. guna menentukan analisa kualitas air. Penelitian dilaksanakan dalam empat tahap yaitu pembuatan perangkat keras, pembuatan perangkat lunak, pengkalibrasian instrumen dilanjutkan dengan uji pengukuran terhadap sampel air dibandingkan dengan instrumen standar pembanding, dan analisis data yang diperoleh. Standar konduktifitas menggunakan larutan KCl pada konsentrasi 0,001 M sampai 0,01 M. Hasil Penelitian menunjukkan bahwa instrumen berbasis mikrokontroler ini mempunyai kemampuan range pembacaan daya hantar listrik air antara 0,209 mS sampai dengan 1,468 mS sesuai dengan range standarisasi KCl, dengan nilai prosentasi akurasi pengukuran sebesar 92,8%, dan nilai presisi Kv dibawah 5%. Tidak terdapat perbedaan hasil pengukuran yang signifikan jika dibandingkan dengan hasil pengukuran instrumen standar.
Voltammetric Synthesis of Conducting Polymer Polypyrrole and Its Response Characteristic to Alcohol Nurqomariyah, Susi; Asnawati, Asnawati; Neran, Neran; Siswoyo, Siswoyo
Jurnal ILMU DASAR Vol 16 No 2 (2015)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (243.328 KB) | DOI: 10.19184/jid.v16i2.1485

Abstract

Conducting polymer is a used material for many purposes, including active compound of chemical sensor. Polypyrrole, one type of conducting polymers, is frequently used because of its advantages, namely owing high conductivity, strong mechanical properties and relatively stable compound.  This research was aimed to develop an alcohol sensor based on polypyrrole. Electropolymerisation of the polypyrrole was carried out using cyclic voltammetric technique. This research investigated some parameters electropolymerisation, namely variation of dopant electrolyte concentration, potential scan-rate, surface morphology of the polymer resulted, characteristic of the sensor performance when exposed to some alcohol compounds. According to the result of investigation, it was found that variation of potential scan-rate and dopant concentration has significant effect to the electropolymerisation process as well as to the resulted polymer, as indicated by the voltammogram profiles, the surface morphology of the resulted polymer and the response of resistance change of the polymer when exposed to the alcohol compounds.Keywords: polypyrrole, conducting polymer, alcohol sensor, cyclic voltammetry, electropolymerisation.