| 何节玉1,2，王泽1，朱佳萍1，金云康1.椰子油基新戊二醇己二酸低聚酯的制备及其黏度调控[J].中国油脂,2023,48(3):.[HE Jieyu1,2, WANG Ze1, ZHU Jiaping1, JIN Yunkang1.Preparation and viscosity regulation of coconut oil-based neopentyl glycol adipate oligoesters[J].China Oils and Fats,2023,48(3):.] |
| 椰子油基新戊二醇己二酸低聚酯的制备及其黏度调控 |
| Preparation and viscosity regulation of coconut oil-based neopentyl glycol adipate oligoesters |
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| DOI： |
| 中文关键词: 椰子油 新戊二醇 己二酸 低聚酯 聚合度 黏度调控 |
| 英文关键词:coconut oil neopentyl glycol adipic acid oligoesters polymerization degree viscosity regulation |
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| 中文摘要: |
| 为获得天然可再生、环境友好的宽黏度范围的椰子油基酯类润滑油，先由新戊二醇(NG)和己二酸(AA)合成不同平均聚合度的中间体，再分别与椰子油脂肪酸反应制备一系列黏度可调控的椰子油基新戊二醇己二酸低聚酯(简称低聚酯)。考察了中间体的主要合成条件带水剂种类、反应温度、反应时间、新戊二醇与己二酸物质的量比(nNG/nAA)对中间体转化率和平均聚合度的影响，比较分析不同平均聚合度的中间体及其低聚酯的FTIR红外光谱，并测定了不同平均聚合度中间体制备的低聚酯黏度。结果表明：nNG/nAA可显著调控中间体的平均聚合度，在优化的合成条件即带水剂为甲苯、反应温度130℃、反应时间3.0 h条件下，通过调整nNG/nAA在1.2∶ 1~3.5∶ 1得到的中间体的转化率可达912%~98.2%，平均聚合度为1.63~6.85；以此聚合度范围中间体可制备获得黏度范围为54.6~378.2 mm2/s (40℃)、8.8~56.5 mm2/s(100℃)的低聚酯。综上，成功制备了宽黏度范围的椰子油基新戊二醇己二酸低聚酯，且新戊二醇与己二酸物质的量比是制备低聚酯较理想的黏度调控因子。 |
| 英文摘要: |
| To obtain naturally renewable and environment-friendly coconut oil-based ester lubricants with a wide viscosity range, the intermediates with different average oligomerization degrees were firstly synthesized by the esterifications of neopentyl glycol (NG) with adipic acid (AA), and then esterified respectively with coconut oil fatty acid to prepare a series of coconut oil-based neopentyl glycol adipate oligoesters (referred to as oligoesters) with variable viscosity. The effects of main synthesis conditions of water-entrainers agent type, reaction temperature, reaction time, molar ratio of NG to AA(nNG/nAA) on the conversion and average polymerization degree were investigated. FTIR spectra of the intermediates with different average polymerization degree and their oligoesters were compared and analysed, also the viscosity of the oligeoesters of intermediates with different average oligomerization degrees were determined. The results showed that the effect of nNG/nAA on the average polymerization degree of intermediates was significant, the conversion of the intermediates under the optimal synthesis conditions with toluene as water-entrainers agent, reaction temperature 130℃ and reaction time 3.0 h could reach 91.2%-98.2% and the average polymerization degree could reach 1.63-6.85 when adjusting nNG/nAA as 1.2∶ 1-3.5∶ 1. And a series of oligoesters with viscosities ranging of 54.6-378.2 mm2/s (40℃) and 8.8-56.5 mm2/s(100℃) could be obtained by the intermediates produced. In summary, coconut oil-based neopentyl glycol adipate oligoesters with a wide viscosity range are successfully prepared, and the molar ratio of neopentyl glycol to adipic acid is a desirable viscosity control factor for the preparation of oligoesters. |
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