Enzymatic one-pot synthesis of renewable and biodegradable surfactants in supercritical carbon dioxide (scCO2),Green Chemistry

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Enzymatic one-pot synthesis of renewable and biodegradable surfactants in supercritical carbon dioxide (scCO2)
Green Chemistry ( IF 9.3 ) Pub Date : 2020/01/27 , DOI: 10.1039/c9gc04011k
Mariana d'Almeida Gameiro _{1,

2} , Amy Goddard _{2,

3} , Vincenzo Taresco _{1,

2} , Steven M. Howdle _{1,

2}

Affiliation

We seek to expand the opportunities to exploit glycerol, a largely untapped renewable feedstock, by exploiting enzymatic catalysis in supercritical carbon dioxide (scCO₂). This work highlights a promising and clean approach to bio-renewable amphiphilic polyester-based biodegradable surfactants. We have developed a low temperature (40, 50 and 60 °C), low energy melt processing route to biodegradable, renewable poly(glycerol succinate) (PGLSA) polymers that importantly have a low degree of branching (3% < DB < 11%). Our approach shows significant advantages over traditional melt polycondensation at 110–120 °C, where the standard catalyst-free approach led only to highly branched (DB > 85%) or insoluble crosslinked materials. We have exploited these linear PGLSA materials to create a library of ‘green’ surfactants by end-capping with lauric acid or poly(ethylene glycol). Our approach avoids pre-modification of the monomers and fewer synthetic steps are required. Finally, we evaluate the performance of these new surfactants, focussing upon surface tension, critical aggregation concentration (CAC) and water contact angle.

中文翻译：

在超临界二氧化碳（scCO2）中酶促一锅法合成可再生和可生物降解的表面活性剂

我们寻求通过利用超临界二氧化碳（scCO ₂）中的酶催化来扩大利用甘油（一种尚未开发的可再生原料）的机会。这项工作突出了一种有前途和清洁的方法，用于生物可再生的两亲性聚酯基生物可降解表面活性剂。我们已经开发出了低温（40、50和60°C）的低能熔体加工路线，以生产可生物降解的可再生聚琥珀酸甘油酯（PGLSA）聚合物，该聚合物的支化度很低（3％<DB <11％）。我们的方法在110-120°C的温度下显示出优于传统熔体缩聚的显着优势，在传统的方法中，无催化剂的标准方法仅导致高度支化（DB> 85％）或不溶性交联材料。我们已经利用这些线性PGLSA材料创建了一个“通过用月桂酸或聚乙二醇封端制备绿色表面活性剂。我们的方法避免了单体的预改性，并且需要更少的合成步骤。最后，我们评估这些新型表面活性剂的性能，重点是表面张力，临界聚集浓度（CAC）和水接触角。

更新日期：2020-02-24

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