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All Journal Indonesian Journal of Chemistry JCER (Journal of Chemistry Education Research)
Maria Monica Sianita
Department Of Chemistry, Faculty Of Mathematics And Science, Universitas Negeri Surabaya, Jl. Ketintang, Surabaya 60231, Indonesia
Chemical Engineering, Chemistry & Bioengineering Chemistry Education

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Transport Properties, Mechanical Behavior, Thermal and Chemical Resistance of Asymmetric Flat Sheet Membrane Prepared from PSf/PVDF Blended Membrane on Gauze Supporting Layer Nita Kusumawati; Pirim Setiarso; Maria Monica Sianita; Supari Muslim
Indonesian Journal of Chemistry Vol 18, No 2 (2018)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (545.097 KB) | DOI: 10.22146/ijc.27272

Abstract

Asymmetric polysulfone (PSf) membrane is prepared using phase inversion method and blending with polyvinylidene fluoride (PVDF) on the gauze solid support. Casting solution composition optimization has been done to get PSf/PVDF membrane with best characteristics and permeability. The result shows that blending on PSf with PVDF polymer using phase inversion method has been very helpful in creating an asymmetric porous membrane. Increased level of PVDF in casting solution has increased the formation of asymmetry structure and corresponding flux membrane. The result from thermal test using Differential Scanning Calorimetry (DSC)-Thermal Gravimetric Analysis (TGA) shows the resistance of the membrane to temperature 460 °C. Membrane resistance against acid looks from undetectable changes on infrared spectra after immersion process in H2SO4 6–98 v/v%. While membrane color changes from white to brownish and black is detected after the immersion process in sodium hydroxide (NaOH) 0.15–80 w/v%.
ENGLISH FOR TEP LEARNING MEDIA BASED VI-LEARN TO TRAIN VERBAL COMMUNICATION SKILLS OF CHEMISTRY STUDENT Bertha Yonata; Maria Monica SBW; DIAN NOVITA
JCER (Journal of Chemistry Education Research) Vol. 2 No. 2 (2018): Volume 2 No. 2 December 2018
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jcer.v2n2.p70-75

Abstract

Learning can not only be done in the classroom with direct face-to-face activities but can now be done with the help of IT, for example with learned learning. Although learning with vi-learn or e-learn cannot indeed replace overall face-to-face learning in the classroom. The world of education cannot be separated from technological advances such as this study because sometimes in carrying out classroom learning there are obstacles that cannot be avoided. These obstacles can be administrative in nature such as national holidays which coincide with the schedule of courses and cannot be replaced on another day due to limited space and insufficient time. In this study, learning tools for the English for TEP-based learning program have been developed to learn the verbal communication skills of students majoring in chemistry. From the data from the validation results, it can be concluded that learning devices consisting of enrichment modules and worksheets are feasible to be used in learning lessons. Likewise, from the response data, students showed a positive response from students in using enrichment modules and worksheets.
Co-Authors Bertha Yonata Nita Kusumawati Novita, Dian Pirim Setiarso Supari Muslim