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Abstrak :
Telah dilakukan kegiatan penelitian sistesis bio-polimer dari turunan minyak sawit dalam hal ini adalah asam oleat. Metoda proses polimerisasi pembuatan bio polimer oleat yaitu polimerisasi kationik melalui beberapa 2 tahap. Tahap 1 (kesatu) yaitu pembuatan metil ester melalui reaksi esterifikasi asam oleat dengan metanol. Kondisi optimum reaksi esterifikasi dilakukan pada temperatur 70-80oC, waktu proses selama 4 jam, penambahan katalis asam sulfat (H2SO4) sebanyak 1% dari berat total reaktan dan perbandingan ratio antara asam oleat dan methanol sebesar 1 : 3. Konversi reaksi pembentukan metil ester oleat sebesar 97%. Tahap 2 (kedua) yaitu proses polimerisasi metil ester oleat. Proses optimum polimerisasi metil ester dilakukan pada suhu 140 oC selama 15 jam dengan katalis BF3.2H2O sebanyak 3% dari berat total reaktan, konversi reaksi yang terbentuk sebesar 66%. Produk bio-polimer yang dihasilkan dianalisa menggunakan FTIR dan H-NMR. Berat molekul dari polimer ester oleat sebesar 7588,4 gr/mol dengan menggunakan metoda viskometrik. ......Has been done research activities sistesis bio-polimer of the derivatives palm oil in this case is oleic acid.The process of making method polymerization bio polymer the cationic oleic polymerization through 2 stages. The 1 (one) that is making methyl ester by a reaction esterification oleic acid with methanol.The steady reaction esterification done at the temperature 70-80oC, when the process during, 4 hours adding a catalyst sulphuric acid ( H2SO4 ) as many as 1 % of the total weight ratio a reactant and the difference between oleic acid and methanol of 1:3. Conversion reaction methyl ester oleic formation of 97 %. Phase 2 (two) the process of polymerization methyl ester oleic.The optimum polymerization methyl ester done on the temperature 140oC for 15 hours with a catalyst BF3.2H2O as much as 3 % of the total weight of a reactant, conversion reaction formed by 66%. The product bio-polimer produced analysis using FTIR and H-NMR. Molecular weight of polymers ester oleic of 7588 using viscometric method.

Abstrak :
The present study investigates the aqueous stability of polyethylene glycol and oleic acid- based anionic surfactants through the dynamic light scattering (DLS) and zeta potential methods, for application in enhanced oil recovery (EOR). Polyethylene glycol dioleate sulfonate (PDOS) surfactant solutions were prepared in concentrations of 0.05, 0.1, 0.3, 0.5, and 1 wt% in deionized water. Aqueous stability of PDOS was assessed by measuring the droplet size over five days, using nano particle analyzer HORIBA SZ-100 at 25oC. Results show that good aqueous stability of PDOS was achieved at concentrations of 0.1 to 1 wt%, but with the droplet size becoming unstable at the lowest concentration of 0.05 wt%. The polydispersity indices were classified into polydisperse distribution type recorded as 0.3 to 0.5 at concentrations of 0.05 and 0.1 wt% and 0.2 at concentrations of 0.3 to 1 wt%. The critical micelle concentration (CMC) of PDOS was 0.3% and the interfacial tension of PDOS surfactant above the CMC was around 10-3 dyn/cm. The zeta potential of PDOS surfactant without the addition of salt in concentrations of 0.05, 0.1, 0.3, 0.5, and 1 wt% was highly stable up to -96.8, -90.5, -89.6, -82.3, and -64.4 mV, respectively. With the addition of salt they were moderately stable at a concentration of 1 wt%. The conductivity increased with increasing concentration. The zeta potential of PDOS with the addition of salt was moderately stable in a concentration of 1%. Although PDOS with concentration of 0.05% showed a high value of zeta potential with the addition of salt, there is no guarantee that the PDOS surfactant solution will be stable for five days.