期刊
NANOMATERIALS
卷 12, 期 17, 页码 -出版社
MDPI
DOI: 10.3390/nano12172900
关键词
food-grade alpha-cyclodextrin nanosponges; ethylene scavenger; HPLC-DAD; ball milling; imidazole; scale-up; active packaging
类别
资金
- Spanish Ministerio de Ciencia e Innovacion [RTI2018-097805-B-I0]
This study aimed to scale up and ensure the safety of alpha-cyclodextrin nanosponges (alpha-CD-NS) for use as greener ethylene scavengers. By using solvent-free synthesis and optimizing washing in water, alpha-CD-NS showed the best ethylene scavenging activity, opening doors for safer, innovative, and eco-friendly ethylene removal active packaging.
Aiming at the development of a greener ethylene removal alternative, the goal of this study was to scale up and ensure the safety of alpha-cyclodextrin nanosponges (alpha-CD-NS) for further use as ethylene scavengers. The solvent-free synthesis of alpha-CD-NS was successfully scaled up using acyclodextrin and N,N'-carbonyldiimidazole as cross-linkers (1:4 molar ratio) by means of mechanical alloying using a PM 100 ball mill by focusing on varying the rotation frequency, as determined by FTIR-ATR, X-ray diffraction, and TGA. alpha-CD-NS washing optimization was performed in water by monitoring the imidazole concentration in the washing solution through the validation of a fast and sensitive HPLC-DAD method. After 6 h at 40 degrees C, all imidazole was extracted, allowing a faster and less energy-dependent extraction. a-CD-NS absorbent capacity and porosity were also evaluated through BET isotherms and ethylene absorption experiments using a-CD-NS and commercially available absorbents (zeolite and bentonite) were performed by means of gas chromatography (GC) coupled to a flame ionization detector (FID). With a 93 mu L h(-1) kg(adsorbent)(-1) ethylene removal capacity, alpha-CD-NS revealed the best ethylene scavenging activity when compared to the other absorbents, opening the doors for a safer, innovative, and eco-friendlier ethylene removal active packaging.
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