Rai Widarta I Wayan, Rukmini Ambar, Santoso Umar, Raharjo Sri
Department of Food Technology, Faculty of Agricultural Technology, Udayana University, Bali, Indonesia.
Department of Food and Agricultural Product Technology, Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia.
Heliyon. 2022 May 24;8(5):e09523. doi: 10.1016/j.heliyon.2022.e09523. eCollection 2022 May.
Surfactants are used to reduce surface and interfacial tension to form emulsions. Polysaccharides such as Porang Glucomannan (PG) with high viscosity can be used as surfactants. This research aimed to optimize the concentration of sodium carbonate (NaCO) and octenyl succinic anhydride (OSA) in modifying PG using a microwave. The optimization process is carried out using response surface methodology (RSM) with a two-factor central composite design (CCD), namely concentration of NaCO (0.17-5.834%) and OSA (2.17-7.83%). The result showed that the concentration of NaCO and OSA strongly influences emulsion capacity and stability. The optimum conditions that resulted in the highest emulsion capacity and stability were obtained at concentrations of NaCO and OSA which were 2.25% and 6.19%, respectively. Degree of Substitution (DS), FTIR analysis, contact angle, and increased viscosity confirmed that OSA substitution occurred in PG. The characteristics of OSA-modified porang glucomannan (PGOS) such as: emulsion capacity and stability, Degree of Substitution (DS), contact angle, and viscosity increased to 34.6% and 32.5%, 1.02%, 92, 5720 cP, respectively. FT-IR analysis confirmed the presence of OSA substitution at 1734 cm. PGOS can be used as a surfactant or gelator in oleogel production.
表面活性剂用于降低表面和界面张力以形成乳液。具有高粘度的多糖如魔芋葡甘露聚糖（PG）可用作表面活性剂。本研究旨在优化使用微波改性PG时碳酸钠（NaCO）和辛烯基琥珀酸酐（OSA）的浓度。优化过程采用响应面法（RSM）和二因素中心复合设计（CCD）进行，即NaCO浓度（0.17 - 5.834%）和OSA浓度（2.17 - 7.83%）。结果表明，NaCO和OSA的浓度对乳液容量和稳定性有强烈影响。在NaCO和OSA浓度分别为2.25%和6.19%时获得了导致最高乳液容量和稳定性的最佳条件。取代度（DS）、傅里叶变换红外光谱（FTIR）分析、接触角和粘度增加证实了PG中发生了OSA取代。OSA改性魔芋葡甘露聚糖（PGOS）的特性，如乳液容量和稳定性、取代度（DS）、接触角和粘度分别增加到34.6%和32.5%、1.02%、92、5720厘泊。傅里叶变换红外光谱（FT - IR）分析证实在1734厘米处存在OSA取代。PGOS可用于油凝胶生产中的表面活性剂或胶凝剂。
