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首页> 外文期刊>The Journal of automatic chemistry >Physical Characteristics of Tetrahydroxy and Acylated Derivatives of Jojoba Liquid Wax in Lubricant Applications
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Physical Characteristics of Tetrahydroxy and Acylated Derivatives of Jojoba Liquid Wax in Lubricant Applications

机译：霍霍巴液体蜡的四羟基和酰化衍生物在润滑剂中的物理特性。

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摘要

Jojoba liquid wax is a mixture of esters of long-chain fatty acids and fatty alcohols mainly C38:2–C46:2. The oil exhibits excellent emolliency on the skin and, therefore, is a component in many personal care cosmetic formulations. The virgin oil is a component of the seed of the jojoba (Simmondsia chinensis) plant which occurs naturally in the Sonora Desert in the United States and northwestern Mexico as well as in the northeastern Sahara desert. The seed contains 50–60% oil by dry weight. The plant has been introduced into Australia, Argentina, and Israel for commercial production of the jojoba oil. As a natural lubricant, we are seeking to explore its potential as a renewable industrial lubricant additive. Thus, we have chemically modified the carbon-carbon double bonds in the oil structure in order to improve its already good resistance to air oxidation so as to enhance its utility as well as its shelf life in nonpersonal care applications. To achieve this goal, we have hydroxylated its –C=C– bonds. Acylation of the resulting hydroxyl moieties has generated short-chain vicinal acyl substituents on the oil which keep the wax liquid, improving its cold flow properties and also protecting it from auto-oxidation and rancidity.
机译：霍霍巴液体蜡是长链脂肪酸与脂肪醇的酯的混合物，主要是C38：2–C46：2。该油在皮肤上显示出优异的润肤性，因此是许多个人护理化妆品配方中的一种成分。原始油是荷荷巴油（Simmondsia chinensis）植物种子的一种成分，该植物天然存在于美国和墨西哥西北部的索诺拉沙漠以及撒哈拉沙漠的东北部。种子的干重为50-60％。该工厂已被引入澳大利亚，阿根廷和以色列，用于霍霍巴油的商业化生产。作为天然润滑剂，我们正在努力探索其作为可再生工业润滑剂添加剂的潜力。因此，我们已经对油结构中的碳-碳双键进行了化学修饰，以改善其已经良好的抗空气氧化性，从而提高其效用以及在非个人护理应用中的保质期。为了实现此目标，我们已羟基化了其–C = C–键。所得羟基部分的酰化作用已在油上产生短链附近的酰基取代基，这些取代基使蜡保持液态，改善了蜡的冷流性能，并保护了蜡免于自身氧化和酸败。

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