CN110564503A - 一种紫苏精油微囊粉及其制备方法和应用 - Google Patents
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Abstract
本发明公开了一种紫苏精油微囊粉及其的制备方法和应用，选用低粘度辛烯基琥珀酸淀粉酯作为壁材，其具有包埋率和释放率高等优点，此外低粘度辛烯基琥珀酸淀粉酯本身具有良好的乳化性，且乳化性能强于一般的小分子乳化剂，在制备微囊粉的过程中不需添加新的乳化剂，节约了成本，简化了操作步骤；紫苏精油微囊粉通过气体的扩散均匀有效地作用于果蔬，本发明提供的是一种更为安全、有效的保鲜剂。
Description
技术领域
本发明涉及食品保鲜剂技术领域，特别是一种紫苏精油微囊粉及其制备方法和应用。
背景技术
防腐保鲜技术在食品工业领域占据着重要的地位，而化学合成的防腐剂均存在潜在的毒性，有很大的安全隐患，因此寻求一种天然低毒防腐剂成为食品工业领域研究的热点，自然界中许多植物精油具有抗菌作用。
紫苏富含精油，该精油在食品、烟草、制药等领域具有广泛的应用。紫苏精油具有高抗氧化、抗菌、抗炎、杀虫、抗癌和抗抑郁等作用，具有很高的研究价值，但紫苏精油具有较强的挥发性，遇光和热不稳定，在空气中易被氧化，且高浓度植物精油直接施用于农产品易造成其细胞损伤，因此在一定程度上限制了它的应用。
因此，亟待开发一种紫苏精油微囊粉及其制备方法。
发明内容
本发明的目的是要解决现有技术中存在的不足，提供一种紫苏精油微囊粉及其制备方法和应用，能够快速地制备紫苏精油微囊粉，为紫苏精油稳定性的提高及在食品防腐保鲜领域提供理论依据和技术参考。
为达到上述目的，本发明是按照以下技术方案实施的：
一种紫苏精油微囊粉的制备方法，包括如下步骤：
S1、将低粘度辛烯基琥珀酸淀粉酯与去离子水按照2-4:10的质量比混合，加入磁力搅拌机中进行充分搅拌，真空脱气泡得到溶液A，待用；
S2、将溶液A于80℃条件下水浴加热10min，完全糊化后真空脱气泡得到溶液B，待用；
S3、将紫苏精油用无水乙醇稀释至浓度为70-90％；
S4、将溶液A和溶液B按2-4:1的质量比混合制得复合溶液，在8000-12000rpm转速条件下均质3-5min，获得紫苏精油乳化液；
S5、将紫苏精油乳化液置于真空条件下脱气2-5min，待用；
S6、将喷雾干燥机进风口温度设为160-180℃，出口温度100℃，进料流量设为500mL/h，将紫苏精油乳化液在此条件下进行喷雾干燥，得到紫苏精油微囊粉。
利用上述方法制得紫苏精油微囊粉。
另外，本发明还提供了一种紫苏精油微囊粉的应用，所述紫苏精油微囊粉置于果蔬包装盒内用于对果蔬保鲜。
与现有技术相比，本发明提供的是一种更适宜工业化制备紫苏精油微囊粉的方法，本方法选用低粘度辛烯基琥珀酸淀粉酯作为壁材，其具有包埋率和释放率高等优点，此外低粘度辛烯基琥珀酸淀粉酯本身具有良好的乳化性，且乳化性能强于一般的小分子乳化剂，在制备微囊粉的过程中不需添加新的乳化剂，节约了成本，简化了操作步骤。紫苏精油微囊粉通过气体的扩散均匀有效地作用于果蔬，本发明提供的是一种更为安全、有效的保鲜剂。
附图说明
图1为本发明实施例1的紫苏精油微囊粉的扫描电镜图。
图2为本发明实施例1的紫苏精油微囊粉的红外光谱图：a为紫苏精油微囊粉；b为紫苏精油；c为低粘度辛烯基琥珀酸淀粉酯。
具体实施方式
为使本发明的目的、技术方案及优点更加清楚明白，以下结合实施例，对本发明进行进一步的详细说明。此处所描述的具体实施例仅用于解释本发明，并不用于限定发明。
实施例1
准确称取10g低粘度辛烯基琥珀酸淀粉酯与100mL水混合，磁力搅拌机充分搅拌，真空脱气，置于80℃恒温水浴锅中糊化10min，获得低粘度辛烯基琥珀酸淀粉酯壁材溶液；准确量取6mL紫苏精油，用4mL无水乙醇稀释；将上述两种溶液按2:1混合，在8000-12000rpm转速条件下均质3-5min后置于真空条件下脱气2-5min，获得紫苏精油乳化液；将紫苏精油乳化液于进风口温度为160-180℃，物料流量为500mL/h的条件下进行喷雾干燥，形成紫苏精油微囊粉，其包埋率为45.67％。将少许紫苏精油微囊粉置于样品台上，除去多余的粉末杂质。喷金后用扫描电子显微镜观察微囊粉的表面结构，加速电压为20KV，通过扫描电子显微镜观察，紫苏精油微囊粉的扫描电镜图如图1所示。
分别称取适量低粘度辛烯基琥珀酸淀粉酯、紫苏精油及紫苏精油微囊粉，依次与烘干溴化钾混合均匀后研磨，然后放入模具内，在压片机上抽真空压片，压力2MPa，时间1min，制成厚约l mm、直径为10mm的透明薄片样品，以溴化钾薄片作为空白对照，采用傅里叶变换红外光谱仪在4000-400cm-1内进行红外扫描，结果如图2所示，a紫苏精油微囊粉，b紫苏精油，c低粘度辛烯基琥珀酸淀粉酯。紫苏精油的主要成分为萜烯类化合物，其特征红外吸收峰广泛分布在500～3800cm-1处，如图2中的b所示，由于紫苏精油的包入，紫苏精油在1300～1000cm-1、3000～2750cm-1及3500～3200cm-1的吸收峰被低粘度辛烯基琥珀酸淀粉酯粉末吸收峰覆盖，这说明紫苏精油被成功包覆于低粘度辛烯基琥珀酸淀粉酯中。
取1g的紫苏精油微囊粉，置于果蔬包装盒内对其进行保鲜研究。对果蔬失重率，腐烂率，VC含量进行测定，结果显示，处理组果蔬的失重率为对照组的92.86％，腐烂率是对照组的53.10％，果蔬色泽差异不显著，VC含量是对照组的1.06倍。总体上，紫苏精油微囊粉对果蔬的保鲜作用不明显。
实施例2
准确称取20g低粘度辛烯基琥珀酸淀粉酯与100mL水混合，磁力搅拌机充分搅拌，真空脱气，置于80℃恒温水浴锅中糊化10min，获得低粘度辛烯基琥珀酸淀粉酯壁材溶液；准确量取8mL紫苏精油，用2mL无水乙醇稀释；将上述两种溶液按3:1混合，在8000-12000rpm转速条件下均质3-5min后置于真空条件下脱气2-5min，获得紫苏精油乳化液；将紫苏精油乳化液于进风口温度为160-180℃，物料流量为500mL/h的条件下进行喷雾干燥，形成紫苏精油微囊粉，其包埋率为79.23％。取2g的紫苏精油微囊粉，置于果蔬包装盒内对其进行保鲜研究。对果蔬失重率，腐烂率，VC含量进行测定，结果显示，与对照组相比，果蔬的失重率显著减小，为对照组的40.68％；腐烂率明显降低，为对照组的42.63％；较好地保持了新鲜果蔬的色泽，VC含量是对照组的1.32倍。总体上，紫苏精油微囊粉可以有效地抑制果蔬的生理活动及霉变腐败。
实施例3
准确称取30g低粘度辛烯基琥珀酸淀粉酯与100mL水混合，磁力搅拌机充分搅拌，真空脱气，置于80℃恒温水浴锅中糊化10min，获得低粘度辛烯基琥珀酸淀粉酯壁材溶液；准确量取10mL紫苏精油；将上述两种溶液按4:1混合，在8000-12000rpm转速条件下均质3-5min后置于真空条件下脱气2-5min，获得紫苏精油乳化液；将紫苏精油乳化液于进风口温度为160-180℃，物料流量为500mL/h的条件下进行喷雾干燥，形成紫苏精油微囊粉，其包埋率为31.23％。取3g的紫苏精油微囊粉，置于果蔬包装盒内对其进行保鲜研究。对果蔬失重率，腐烂率，VC含量进行测定，结果显示，处理组果蔬的失重率为对照组的94.26％，腐烂率是对照组的63.25％，果蔬色泽差异不显著，VC含量是对照组的1.02倍。总体上，紫苏精油微囊粉对果蔬的保鲜作用不明显。
本发明的技术方案不限于上述具体实施例的限制，凡是根据本发明的技术方案做出的技术变形，均落入本发明的保护范围之内。
Claims (3)
1.一种紫苏精油微囊粉的制备方法，其特征在于，包括如下步骤：
S1、将低粘度辛烯基琥珀酸淀粉酯与去离子水按照2-4:10的质量比混合，加入磁力搅拌机中进行充分搅拌，真空脱气泡得到溶液A，待用；
S2、将溶液A于80℃条件下水浴加热10min，完全糊化后真空脱气泡得到溶液B，待用；
S3、将紫苏精油用无水乙醇稀释至浓度为70-90％；
S4、将溶液A和溶液B按2-4:1的质量比混合制得复合溶液，在8000-12000rpm转速条件下均质3-5min，获得紫苏精油乳化液；
S5、将紫苏精油乳化液置于真空条件下脱气2-5min，待用；
S6、将喷雾干燥机进风口温度设为160-180℃，出口温度100℃，进料流量设为500mL/h，将紫苏精油乳化液在此条件下进行喷雾干燥，得到紫苏精油微囊粉。
2.一种紫苏精油微囊粉，其特征在于，利用权利要求1所述的紫苏精油微囊粉的制备方法制得紫苏精油微囊粉。
3.一种如权利要求2所述的紫苏精油微囊粉的应用，其特征在于：所述紫苏精油微囊粉置于果蔬包装盒内用于对果蔬保鲜。
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| CN111727981A (zh) * | 2020-05-26 | 2020-10-02 | 湖南华瑞康源科技有限公司 | 一种含有微囊缓释组合物的喷剂及其制备方法和应用 |
| CN114569327A (zh) * | 2022-03-30 | 2022-06-03 | 珠海横琴澳叶健康科技有限公司 | 一种缓解视疲劳的中药蒸气眼罩 |
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