Zarra and Intan succeeded to defend their thesis

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Zarra successfully defended their thesis in front of three examiners (Prof. Ali Altway, Prof. Sugeng Winardi and Dr. Samsudin Affandi) on Thursday, 16 July 2013. Her thesis entitled: “Synthesis of sulfonate-grafted silica/chitosan membrane for proton exchange membrane”. She presented her thesis well and could answer most of the questions.

After being delayed for one day due to two of the examine had other duty, Intan also successfully defended her thesis entitled: “Coating of steel with nanosilica by electrophoretic deposition using pulsed direct current for corrosion protection.” However, one of the examiners (Prof. Suprapto) still could not come and the examination proceeded with only two examiners, Dr. Tantular Nurtono and Dr. Widiyastuti. She also presented and answer most of the questions well.

Congratulations both of you. Good luck and we hope God bless you.

Skripsi seminar for B4 students

 

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Rizka, Ina, Tigor, Winny, Kiki, Eka, Supri, Sabrina, Andar, Wangling, Irul, Ima, Yuni, Fanny, Dwi, Merry

Last week, our B4 students have successfully defended their thesis. On Monday, 24 June 2013, Shabrina and Eka defended the thesis entitled: “Hydrophobic silica coating from water glass on cupper by electrophoresis method”, and Ima and Dwi defended on “Increasing the amount of amine grafted on silica gel from bagasse ash by pore expansion using PEG templating.”

On Thursday, there were 4 groups defended their thesis. They were

  1. Wangling and Rizka defended: Electrochemical performance of Fe3O4/C nanocomposite as anode for Li-ion battery.
  2. Winny and Kiki defended: Preparation of thermal insulator of silica from waterglass using electrophoretic deposition.
  3. Fanny and Irul defended: Electrodeposition of hydroxyapatite-SiO2 composite for biomedical applications.
  4. Yuni and Merry defended: Synthesis of sulfonated silicas from waterglass by PEG templating for acid catalyst.

The last group that defended their thesis were Ina and Tigor, and Andar and Supri on Tuesday, 27 June 2013. Ina and Tigor defended: Synthesis of MnO2 nanoparticles by electrolysis of KMnO4 solution and Andar and Supri defended: Synthesis of silica-carbon composite from geothermal sludge.

Congratulations for all of you.

Seminar of progress report

Yesterday, started from 08.00 a.m., four doctoral students presented the progress of their research work relating with their dissertation. The seminar of the progress report is held periodically by the department to monitor the progress of work carried out by doctoral students. Srie Muljani presented her research on the preparation of silica-based materials from geothermal sludge. Geothermal sludge is solid waste of geothermal power plant. The solid waste was taken from the geothermal power plant located in Dieng plateau, Central Java. The silica content in geothermal sludge is approximately 85% that make it a viable raw material for advanced silica-based materials.

Nanik Astuti Rahman presented her work on the preparation of amine-grafted silica gel from bagasse ash for CO2 removal. Bagasse ash is solid waste of sugar cane mills. There are many sugar cane mills in East Java, Indonesia. Most of the sugar cane mills use bagasse, a cellulose fiber remaining after extracting the cane juice, as fuel for boilers to generate steam during sugar processing. Bagasse ash is rich in silica (>51%) and can be a viable raw material for advanced silica-based materials. In addition, silica surface is rich in silanol group that make it possible to graft other functional group for specific purpose such as CO2 removal.

Adrian Nur presented his research work on the synthesis of nanosized hydrozyapatite (HA) by electrochemical method. HA is phosphate mineral encountered in bone and dental that make it biocompatible for use as bioimplant. There were two possible phase of phosphate formed using this method: HA and brushite. The initial phase after beginning the electrolysis was brushite and after that, it converted into HA. Aging the suspension after electrolysis also could convert brushite into HA.

Nazriati presented her work on the effect of Ni doping on the properties of silica aerogel produced from bagasse ash by ambient pressure drying. The presence of Ni seems to decrease the surface area of the silica aerogel. The Ni-doped silica aerogel will be tested for their capability to adsorb hydrogen. Previous studies showed that doping of Ni on MCM-41 enhanced the capacity of hydrogen storage.

Three master students presented their report the day before. They were Ni Made Intan Putri Suari, Vania Mitha Pratiwi and Zarra Miantina Putrie. Intan presented her work on electrodeposition of nanosized silica on steel for corrosion protection, Mitha on the electrochemical performance of Fe3O4/C composite as anode material for rechargable batteries and Zarra on sulfonate-grafted silica/chitosan membrane for proton exchange membrane.

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Rizka, Ina, Tigor, Winny, Kiki, Eka, Supri, Sabrina, Andar, Wangling, Irul, Ima, Sri, Fanny, Dwi, Merry

Two weeks before, our bachelor students presented their poster paper. The topics are as the following:

  1. Wangling – Rizka: Fe3O4/C composite as anode material for rechargable batteries
  2. Ina -Tigor: Synthesis of MnO2 by electrolysis of KMnO4
  3. Andar – Supri: Silica/C composite from geothermal sludge
  4. Irul – Fanny: Electrophoretic deposition of Hydroxyapatite/SiO2 on titanium for dental implant
  5. Yuni – Merry: Preparation of sulfonate-grafted silica from sodium silicate as an acid catalyst
  6. Ima – Dwi: Grafting of amine on silica produced from bagasse ash for CO2 adsorbent
  7. Winny – Kiki: Thermal insulator from silica gel prepared by electrodeposition of silica sol from sodium silicate
  8. Shabrina – Eka: Hydrophobic coating of Cu by electrophoretic deposition of nanosilica for corrosion protection

Skripsi proposal seminar and preliminary plant design exam

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Today is the last day of skripsi (final task of B4 students) seminar for our B4 students. The seminar was held for one week from 6-11 February 2011. Eight groups (1 group consists of 2 students) of our students presented their research proposal that was commented by three examiners.

One week before, they had to defend their preliminary plant design in front of three examiners. However, only six groups defended their design. Due to some reasons, two groups will be scheduled next semester. Six groups were succesfully defended their plant design.

In the last one month, we were very busy preparing the exam. Now, all have been done smoothly. Let’s continue to complete our other tasks with our best effort. to obtain best results.

Yeye and Yudhis succeeded to defend their final task

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Yesterday, Yehuda Natanael Sumarno (Yeye) and Yudhistiro Doddy Sadewo (Yudhis) succeeded to defend their final task entitled: “Synthesis of Fe3O4/C nanocomposite as anode material for Li-ion battery”. The examiners consist of Prof. Sugeng Winardi, Ir. Minta Yuwana, M.S. and Ir. Winarsih. Unfortunately, Ir. Winarsih could not attend the seminar due to her health reason (we pray for her health). The examination started at 1.00 p.m. attended by our students. Congratulations Yeye and Yudhis!

Seminar of progress report

Today, started from 1.00 p.m., two doctoral students presented the progress of their research work relating with their dissertation. The seminar is held periodically by the department to monitor the prpogress of work carried by doctoral students. Srie Muljani presented her research on the preparation of silica-based materials from geothermal sludge. Geothermal sludge is solid waste of geothermal power plant. The solid waste was taken from the geothermal power plant located in Dieng plateau, Central Java. The silica content in geothermal sludge is approximately 85% that make it a viable raw material for advanced silica-based materials.

Nanik Astuti Rahman presented her work on preparation of amine-grafted silica gel from bagasse ash for CO2 removal. Bagasse ash is solid waste of sugar cane mills. There are many sugar cane mills in East Java, Indonesia. Most of the sugar cane mills use bagasse, a cellulose fiber remaining after extracting the cane juice, as fuel for boilers to generate steam during sugar processing. Bagasse ash is rich in silica (>51%) and can be a viable raw material for advanced silica-based materials. In addition, silica surface is rich in silanol group that make it possible to graft other functional group for specific purpose such as CO2 removal.

Lab Seminar 8 Dec 2012

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We have seminar periodically. In this seminar, students presents their works and then continued by discussion.

Saturday, 8 Dec 2012:

  1. Zarra Miantina Putrie – Preparation of sulfonate-grafted silica/chitosan membrane as proton exchange membrane
  2. Ni Made Intan Putri Suari – Electrophoretic deposition of nanosilica on steel surface by pulsed-direct current for corrosion protection
  3. Vania Mitha Pertiwi – Synthesis of MnO2 by electrochemical method as an anode material for lithium-ion battery

Four groups of B4 students also presented their preliminary plant design as parts of task to finish their study.

  1. Tigor, Ina, Rizka, Wangling – Preliminary design of sago starch plant
  2. Andar, Supri, Yuni, Merry – Preliminary design of adiponitrile plant
  3. Winny, Kiki, Fanny, Irul – Preliminary design of MgO plant
  4. Sabrina, Eka, Ima, Dwi – Preliminary design of Phtalic anhydride plant