橄榄油(茉莉香精)微胶囊的制备及性能研究
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摘要
本文以明胶、阿拉伯胶为壁材,橄榄油和茉莉香精为芯材,分别合成了具有润肤保健和香味功能的微胶囊,并通过浸轧方式将制备的微胶囊整理到织物上,制备了相应的功能织物,详细研究了各工艺参数对微胶囊性能的影响。通过光学显微镜及扫描电镜观察微胶囊表面形貌,用马尔文激光粒度仪测定了微胶囊的粒径及其分布,并采用索氏提取法测定微胶囊的含油率。
     首先以橄榄油为芯材,制备具有缓释功能的橄榄油微胶囊。研究了交联剂用量、壁材浓度、复凝聚过程的pH值及芯材与壁材用量比等对微胶囊性能的影响。实验结果表明:交联剂用量为3ml,壁材浓度为3%,复凝聚过程的pH值为4.0,芯材与壁材用量比为1:1条件下制备的橄榄油微胶囊,其含油率达到60%,平均粒径为3~8μm,表面形态良好。将最佳工艺条件下制备的橄榄油微胶囊通过浸轧方式整理到棉织物上,研究预烘温度、焙烘温度及时间、整理剂固含量、整理剂与粘合剂比例等对棉织物性能影响。通过对整理后棉织物含油率、透气透湿等性能进行测试,对织物整理工艺进行优化。结果表明,棉织物最佳整理工艺条件如下:预烘温度70℃、焙烘温度120℃、焙烘时间1分钟、整理剂固含量为5%、整理剂与黏合剂的比例为1:1。整理后的棉织物含油率在2~5%,手感较好,不影响织物的白度,具有较好的缓释性能,并有一定的耐洗性,能够满足一般服用要求。
     其次以茉莉香精为芯材,制备了香精微胶囊,考察了交联时间、芯材与壁材用量比、交联过程pH值、喷雾干燥进风温度等对微胶囊含油率、粒径大小及分布和微胶囊缓释性能的影响,确定了茉莉香精微胶囊制备的最佳工艺条件。并在此工艺条件下,将茉莉香精和橄榄油混合作为芯材,制备了复合型微胶囊。实验结果表明,茉莉香精微胶囊的最大含油率可以达到38%,平均粒径为6~10μm,整理后的棉布具有较好的缓释性能。而且整理后的织物具有较好的透气透湿性,其透气阻值为0.29 kPa?s/m,透湿量为10828 g/( m2?24h)。复合型香精微胶囊整理的织物的透气阻值为0.282 kPa?s/m,透湿量为10870 g/( m2?24h)。
In this paper, the functional microcapsules of skin-caring and flavor were prepared using gelatin and arabic gum as the wall materials and olive oil and jasmine oil as the core materials. The microcapsules were finished into fabric by padding to obtain functional fabric. The parameters influencing the properties of microcapsules were studied in detail. The morphology was observed by optical microscope and scanning electron microscope. The particle size and distribution were tested by laser particle size analyzer. The oil content of the microcapsules was analyzed through soxhlet extraction.
     First the olive oil microcapsules with the function of slow-releasing were prepared. The process parameters, such as the dosage of the cross linker, concentration of the wall materials, pH adjustment rate and the ratio between core and wall materials, were analyzed in detail. The optimal process parameters were as follow: dosage of the cross linking agent was of 3ml, the concentration of wall materials was of 3%, the pH value of coacervation was 4.0 and the ratio of core/wall material was 1:1. The a oil content of microcapsules prepared at optimal process was up to 60% and the mean particle size was 3~8μm with good surface morphology. Olive oil microcapsules prepared with the best parameters were finished on cotton fabric through padding. The effect of pre-drying temperature, curing temperature and time, solid content of finishing agent, the ratio between finishing agent and adhesive agent were investigated. Through testing the drug-loading rate of olive oil in cotton fabric, breathable and moisture permeability, the optimum parameters were as follow: pre-drying temperature was 70℃, curing temperature was 120℃and time was 1min, solid content of finishing agent was 5%, the ratio between finishing agent and adhesive agent was 1:1. The oil content of cotton fabric was 2~5% and had a good touch feeling and whiteness. Its slow-release property tested with UV spectrophotometer was also good. Breathable and moisture permeability and washing fastness were satisfied to normal needs of fabrics.
     The perfume microcapsules were prepared using the jasmine oil as the core materials. Cross linking time, the ratio of core to wall, pH and the inlet temperature of spray drying were studied to get the optimum process conditions. And the optimal parameters were used to embed jasmine essence and olive oil to get mix cores microcapsules. The results showed that the maximum oil content reached 38%, the mean particle size ranged 6~10μm, the cotton fabric finished has good slow release performance. The breathe freely moisture permeability of fabric finished were good and the air resistance is 0.29 kPa?s/m, the moisture permeability content is 10828g/(m2?24h). The air resistance of complex microcapsules is 0.282 kPa?s/m, its moisture permeability content is 10870 g/(m2?24h).
引文
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