Currently, aluminum phosphide tablets have been extensively used as fumigant for grain storage because it could release phosphine that shows highly efficient anti-microorganism. However, phosphine is highly toxic and flammable which usually causes production accidents. Therefore, this study aimed to develop a novel fumigant based on cinnamaldehyde and study its antimicrobial efficacy for grain storage. The novel fumigant tablet was composed of cinnamaldehyde, silica, citric acid and sodium bicarbonate. Results showed that mesoporous silica with ultra-high specific surface area (1036.5 m²/g) served as carrier for cinnamaldehyde. The mixture of citric acid and sodium bicarbonate reacted with moisture to generate carbon dioxide which was helpful to release cinnamaldehyde. As expected, the fumigant tablet displayed a sustained release effect. The in vitro culture experiments showed that cinnamaldehyde had high antimicrobial efficiency against five fungi including Aspergillus flavus, Aspergillus candidus, Aspergillus niger, Fusarium and Penicillium. In the accelerated mildew simulation experiment (temperature: 35 °C, humidity: 98%), the blank group without mildew preventive began to go mouldy after five days, the control group with only cinnamaldehyde became mildew one week later, whereas there was no visible mildew growth in the experimental group with the fumigant tablet after one week. The number of fungal colonies in the blank group and the control group after one week was 8.3 × 10⁴ and 6.5 × 10³ CFU/g, respectively, while there were no fungi detected in the experimental group. This cinnamaldehyde-based fumigant tablet is a green and safe mildew preventive, which provides an alternative solution to aluminum phosphide tablet for grain storage.

目前，磷化铝片已被广泛用作粮食储存的熏蒸剂，因为它可以释放出显示出高效抗微生物作用的磷化氢。但是，磷化氢具有剧毒和易燃性，通常会导致生产事故。因此，本研究旨在开发一种基于肉桂醛的新型熏蒸剂，并研究其对谷物储存的抗菌功效。新型熏蒸剂片剂由肉桂醛，二氧化硅，柠檬酸和碳酸氢钠组成。结果表明，介孔二氧化硅具有超高的比表面积（1036.5 m ²/ g）用作肉桂醛的载体。柠檬酸和碳酸氢钠的混合物与水分反应生成二氧化碳，有助于释放肉桂醛。如所期望的，熏蒸剂片剂表现出持续释放作用。在体外培养实验表明，肉桂有抗菌高效率对五种真菌，包括黄曲霉，曲霉，黑曲霉，镰刀菌和青霉。在加速发霉模拟实验（温度：35°C，湿度：98％）中，没有防霉剂的空白组在五天后开始发霉，仅肉桂醛的对照组在一周后发霉，而没有可见的霉菌。 1周后，使用熏蒸剂片剂在实验组中发霉。1周后，空白组和对照组的真菌菌落数分别为8.3×10 ⁴和6.5×10 ³ CFU / g，而实验组中未检测到真菌。这种基于肉桂醛的熏蒸剂片剂是一种绿色安全的防霉剂，可为粮食储存用磷化铝片剂提供替代解决方案。