传统的亲水材料输送系统在实际应用中仍然面临着严峻的挑战,包括保留能力差和生物利用度低。该工作使用维生素C作为亲水性活性物的模型,将载有维生素C的油包水型Pickering乳液(Pickering emulsions,PE)包封进海藻酸钙胶囊(PE in alginat...传统的亲水材料输送系统在实际应用中仍然面临着严峻的挑战,包括保留能力差和生物利用度低。该工作使用维生素C作为亲水性活性物的模型,将载有维生素C的油包水型Pickering乳液(Pickering emulsions,PE)包封进海藻酸钙胶囊(PE in alginate capsules,PE@gel)中,利用Pickering乳液的纳米界面膜和水凝胶层的双重保护来提高其稳定性。扫描电镜和激光共聚焦显微镜研究证实,胶囊呈球形,Pickering乳液分布在凝胶网络中。傅里叶红外光谱研究表明,维生素C被物理包封在胶囊中,化学性质未改变。更重要的是,在25℃避光静置条件下,PE@gel与维生素C水溶液相比保留率和相对抗氧化活性分别提高了59.4倍和33.87倍;在紫外灯365 nm照射静置条件下,PE@gel与维生素C水溶液相比保留率和相对抗氧化活性分别提高了42.28倍和27.41倍。该方法为水溶性活性物在食品领域的贮存和应用提供了一个有效且通用的平台。展开更多
Naturally degradable capsule provides a platform for sustained fragrance release.However,practical challenges such as low encapsulation efficiency and difficulty in sustained release are still limited in using fragran...Naturally degradable capsule provides a platform for sustained fragrance release.However,practical challenges such as low encapsulation efficiency and difficulty in sustained release are still limited in using fragranceloaded capsules.In this work,the natural materials sodium alginate and gelatine are dissolved and act as the aqueous phase,lavender is dissolved in caprylic/capric triglyceride(GTCC)as the oil phase,and SiO_(2) nanoparticles with neutralwettability as a solid emulsifier to form O/W Pickering emulsions simultaneously.Finally,multi-core capsules are prepared using the drop injection method with emulsions as templates.The results show that the capsules have been successfully prepared with a spherical morphology and multi-core structure,and the encapsulation rate of multi-core capsules can reach up to 99.6%.In addition,the multi-core capsules possess desirable sustained release performance,the cumulative sustained release rate of fragrance at 25℃over 49 days is only 32.5%.It is attributed to the significant protection of multi-core structure,Pickering emulsion nanoparticle membranes,and hydrogel network shell for encapsulated fragrance.This study is designed to deliver a new strategy for using sustained-release technology with fragrance in food,cosmetics,textiles,and other fields.展开更多
文摘Naturally degradable capsule provides a platform for sustained fragrance release.However,practical challenges such as low encapsulation efficiency and difficulty in sustained release are still limited in using fragranceloaded capsules.In this work,the natural materials sodium alginate and gelatine are dissolved and act as the aqueous phase,lavender is dissolved in caprylic/capric triglyceride(GTCC)as the oil phase,and SiO_(2) nanoparticles with neutralwettability as a solid emulsifier to form O/W Pickering emulsions simultaneously.Finally,multi-core capsules are prepared using the drop injection method with emulsions as templates.The results show that the capsules have been successfully prepared with a spherical morphology and multi-core structure,and the encapsulation rate of multi-core capsules can reach up to 99.6%.In addition,the multi-core capsules possess desirable sustained release performance,the cumulative sustained release rate of fragrance at 25℃over 49 days is only 32.5%.It is attributed to the significant protection of multi-core structure,Pickering emulsion nanoparticle membranes,and hydrogel network shell for encapsulated fragrance.This study is designed to deliver a new strategy for using sustained-release technology with fragrance in food,cosmetics,textiles,and other fields.
