Microplastic-Free Microcapsules to Encapsulate Health-Promoting Limonene Oil.
Microplastic-Free Microcapsules to Encapsulate Health-Promoting Limonene Oil.
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DOI：
10.3390/molecules27217215
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发表时间：
2022-10-25
期刊：
影响因子：
--
通讯作者：
Zhang Z
中科院分区：
文献类型：
--
作者：
Baiocco D;Zhang Z
快速消费品行业长期以来一直在产品中加入许多有吸引力的精油，以满足消费者的需求。其中，柠檬烯(LM)的需求最近因其广泛的健康益处而激增，应用于化妆品、洗涤剂和食品。然而，LM具有极高的挥发性，因此通常被封装以保持较长的货架期。到目前为止，大多数不可生物降解的合成聚合物已经被开发来制造微胶囊外壳，由此产生的微胶囊有助于微塑料在环境中的积累。到目前为止，关于具有天然微塑料外壳的包裹LM的微胶囊及其形成机理的信息有限，并且缺乏对其机械和粘合性能的深入表征，这对于了解其在最终用途中的潜在性能至关重要。本研究旨在以阿拉伯胶(GA)和真菌来源的壳聚糖(FCH)为壳前驱体，通过复合凝聚(CC)法制备以LM为核心的安全微胶囊。用气相色谱(GC)分离法测定其包封率(EE)。用明场光学显微镜和扫描电子显微镜研究了微胶囊的形貌，并用微操作技术对其力学性能进行了表征。此外，通过安装了聚对苯二甲酸乙二醇酯(PET)底物的定制微流控装置，并在越来越大的流体动力剪切力(HSS)下运行，研究了所得到的微胶囊的粘合性能。制得平均粒径为38±2μm的球形核壳微囊(EE%~45%)，表面较光滑。其平均破碎力和名义破裂力分别为0.9±0.1mN和2.1±0.2 Mpa，与尿素和三聚氰胺-甲醛等合成壳层微胶囊相当。研究还发现，FCH-GA复合壳对聚酯薄膜具有良好的粘接性能，在低剪切应力(≤50 Mpa)和高剪切应力(0.9Pa)下，微胶囊的保留率分别为85%和60%。有趣的是，这些值与文献中提供的微塑料微胶囊的附着力数据相似，例如三聚氰胺-甲醛(50%-90%)。总体而言，这些发现表明，已成功制造出以油为核心的无微塑料微胶囊，并可为更可持续、更有利于消费者和环境友好的快速消费品应用提供潜力。
Fast-moving consumer goods (FMCG) industry has long included many appealing essential oils in products to meet consumers’ needs. Among all, the demand for limonene (LM) has recently surged due to its broad-spectrum health benefits, with applications in cosmetic, detergent, and food products. However, LM is extremely volatile, hence has often been encapsulated for a longer shelf-life. To date, mostly non-biodegradable synthetic polymers have been exploited to fabricate the microcapsule shells, and the resulting microcapsules contribute to the accumulation of microplastic in the environment. So far, information on LM-entrapping microcapsules with a natural microplastic-free shell and their mechanism of formation is limited, and there is lack of an in-depth characterisation of their mechanical and adhesive properties, which are crucial for understanding their potential performance at end-use applications. The present research aims towards developing safe microcapsules with a core of LM fabricated via complex coacervation (CC) using gum Arabic (GA) and fungally sourced chitosan (fCh) as shell precursors. The encapsulation efficiency (EE) for LM was quantified by gas chromatography (GC) separation method. The morphology of microcapsules was investigated via bright-field optical microscopy and scanning electron microscopy, and their mechanical properties were characterised using a micromanipulation technique. Moreover, the adhesive properties of the resulting microcapsules were studied via a bespoke microfluidic device fitted with a polyethylene-terephthalate (PET) substrate and operating at increasingly hydrodynamic shear stress (HSS). Spherical core-shell microcapsules (EE ~45%) with a mean size of 38 ± 2 μm and a relatively smooth surface were obtained. Their mean rupture force and nominal rupture stress were 0.9 ± 0.1 mN and 2.1 ± 0.2 MPa, respectively, which are comparable to those of other microcapsules with synthetic shells, e.g., urea- and melamine-formaldehyde. It was also found that the fCh-GA complexed shell provided promising adhesive properties onto PET films, leading to a microcapsule retention of ~85% and ~60% at low (≤50 mPa) and high shear stress (0.9 Pa), respectively. Interestingly, these values are similar to the adhesion data available in literature for microplastic-based microcapsules, such as melamine-formaldehyde (50–90%). Overall, these findings suggest that microplastics-free microcapsules with a core of oil have been successfully fabricated, and can offer a potential for more sustainable, consumer- and environmentally friendly applications in FMCGs.
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影响因子：
3.5
作者：
Long, Yue;Song, Kai;Preece, Jon A.
通讯作者：
Preece, Jon A.
影响因子：
4.6
作者：
Haave, Marte;Gomiero, Alessio;Olsen, Anne Berit
通讯作者：
Olsen, Anne Berit
影响因子：
2.6
作者：
Leclercq, Segolene;Harlander, Kristin R.;Reineccius, Gary A.
通讯作者：
Reineccius, Gary A.
DOI：
10.1016/j.colsurfa.2005.04.015
发表时间：
2005-07-15
影响因子：
5.2
作者：
Liu, EH;McGrath, KM
通讯作者：
McGrath, KM
影响因子：
2.5
作者：
Chaimovitsh, David;Shachter, Alona;Dudai, Nativ
通讯作者：
Dudai, Nativ