Compatibility of different biodiesel composition with acrylonitrile butadiene rubber (NBR)

Compatibility of different biodiesel composition with acrylonitrile butadiene rubber (NBR)
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DOI：
10.1016/j.fuel.2015.05.054
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发表时间：
2015-10
期刊：
Fuel
影响因子：
7.4
通讯作者：
Lei Zhu;C. Cheung;Wei-jiang Zhang;Zhen Huang
Lei Zhu;C. Cheung;Wei-jiang Zhang;Zhen Huang
中科院分区：
工程技术1区
文献类型：
--
作者：
Lei Zhu;C. Cheung;Wei-jiang Zhang;Zhen Huang

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研究了生物柴油的分子结构和原料对其与弹性体相容性的影响。对9种燃料进行了测试，以评估它们与丁腈橡胶（NBR）的相容性。测试燃料包括柴油、废食用油甲酯、棕榈油甲酯、大豆油甲酯、月桂酸甲酯（C12:0）、棕榈酸甲酯（C16:0）、硬脂酸甲酯（C18:0）、油酸甲酯（C18:1 M）及油酸乙酯（C18:1 E）。丁腈橡胶经过浸泡试验后，其重量、体积和力学性能的变化表明，生物柴油比普通柴油具有更大的溶剂力。结果表明，生物柴油与丁腈橡胶的相容性依次为大豆甲酯（SME）、废食用油甲酯（WCOME）、棕榈甲酯（PME），其中SME的相容性最差。脂肪酸酯的碳链长、双键数和醇段链长也对其与丁腈橡胶的相容性有很大影响。碳链或双键较短的脂肪酸酯具有较高的溶剂力。因此，生物柴油的组成可以在生产过程中通过使用新的生产技术或采用各种原料来改进其与弹性体的相容性，从而进行改性和优化。
The effects of molecular structure and feedstock of biodiesel on its compatibility with an elastomer were investigated in this study. Nine fuels were tested to evaluate their compatibility with nitrile butandiene rubber (NBR). The tested fuels include diesel fuel, waste cooking oil methyl ester, palm oil methyl ester, soybean oil methyl ester, methyl laurate (C12:0), methyl palmitate (C16:0), methyl stearate (C18:0), methyl oleate (C18:1 M) and ethyl oleate (C18:1 E). The change in weight, volume and mechanical properties of the NBR, after performing the immersion test, indicate that biodiesel has greater solvent power than diesel fuel. The sequence of compatibility of biodiesel with NBR is found to be in the order of soybean methyl ester (SME), waste cooking oil methyl ester (WCOME), palm methyl ester (PME), with SME being the least compatible. The carbon chain length, number of double bonds, and alcohol moiety chain length of the fatty acid ester also have great influence on its compatibility with the NBR. Fatty acid esters with shorter carbon chain or double bonds have higher solvent power. Thus, the composition of biodiesel could be modified and optimized during its production process through the use of new production techniques or adopting various feedstocks to improve its compatibility with an elastomer.