Röcker Bettina, Mäder Gabriel, Monnard Fabien Wilhelm, Jancikova Magdalena, Welker Matthias, Schoelkopf Joachim, Yildirim Selçuk
Institute of Food and Beverage Innovation, Department of Life Sciences and Facility Management, Zurich University of Applied Sciences, Campus Reidbach, 8820 Wädenswil, Switzerland.
Omya International AG, Baslerstrasse, 4665 Oftringen, Switzerland.
Materials (Basel). 2021 Sep 1;14(17):5000. doi: 10.3390/ma14175000.
Modified calcium carbonates (MCC) are inorganic mineral-based particles with a large surface area, which is enlarged by their porous internal structure consisting of hydroxyapatite and calcium carbonate crystal structures. Such materials have high potential for use as carriers for active substances such as oxygen scavenging agents. Oxygen scavengers are applied to packaging to preserve the quality of oxygen-sensitive products. This study investigated the potential of MCC as a novel carrier system for unsaturated fatty acids (UFAs), with the intention of developing an oxygen scavenger. Linoleic acid (LA) and oleic acid (OA) were loaded on MCC powder, and the loaded MCC particles were characterized and studied for their oxygen scavenging activity. For both LA and OA, amounts of 20 wt% loading on MCC were found to provide optimal surface area/volume ratios. Spreading UFAs over large surface areas of 31.6 and 49 m g MCC enabled oxygen exposure and action on a multitude of molecular sites, resulting in oxygen scavenging rates of 12.2 ± 0.6 and 1.7 ± 0.2 mL O d g, and maximum oxygen absorption capacities of >195.6 ± 13.5 and >165.0 ± 2.0 mL g, respectively. Oxygen scavenging activity decreased with increasing humidity (37-100% RH) and increased with rising temperatures (5-30 °C). Overall, highly porous MCC was concluded to be a suitable UFA carrier for oxygen scavenging applications in food packaging.
改性碳酸钙(MCC)是一种无机矿物基颗粒,具有较大的表面积,其多孔内部结构由羟基磷灰石和碳酸钙晶体结构组成,从而扩大了表面积。这类材料具有很高的潜力,可作为诸如氧气清除剂等活性物质的载体。氧气清除剂应用于包装中,以保持对氧气敏感产品的质量。本研究调查了MCC作为不饱和脂肪酸(UFA)新型载体系统的潜力,旨在开发一种氧气清除剂。将亚油酸(LA)和油酸(OA)负载在MCC粉末上,并对负载后的MCC颗粒进行表征,并研究其氧气清除活性。对于LA和OA,发现MCC上20 wt%的负载量可提供最佳的表面积/体积比。将UFA铺展在31.6 和49 m²/g MCC的大表面积上,可使氧气暴露并作用于众多分子位点,导致氧气清除率分别为12.2±0.6和1.7±0.2 mL O₂/d g,最大氧气吸收容量分别>195.6±13.5和>165.0± 2.0 mL/g。氧气清除活性随湿度增加(37 - 100%RH)而降低,随温度升高(5 - 30°C)而增加。总体而言,高度多孔的MCC被认为是食品包装中用于氧气清除应用的合适UFA载体。