Pratiwi Luthfia, Eddy Diana Rakhmawaty, Al Anshori Jamaludin, Harja Asep, Wahyudi Tatang, Mulyawan Agus Surya, Julaeha Euis
Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Padjadjaran Jl. Raya Bandung-Sumedang km.21, Jatinangor Sumedang 45363 West Java Indonesia
Department of Geophysics, Faculty of Mathematics and Natural Sciences, Universitas Padjadjaran Jl. Raya Bandung-Sumedang km.21, Jatinangor Sumedang 45363 West Java Indonesia.
RSC Adv. 2022 Oct 26;12(47):30682-30690. doi: 10.1039/d2ra04053k. eCollection 2022 Oct 24.
A functional fabric immobilized by the microcapsules of lime essential oil (LO) was prepared and characterized. A varied amount of CaCl crosslinker was optimized to coacervate LO using alginate-gelatin biopolymers and Tween 80 emulsifier. A further evaluation of the immobilized LO microcapsules for the antibacterial effect against both Gram-positive and Gram-negative bacteria was conducted. The optimized alginate/gelatin-based microcapsules were effectively crosslinked by 15% CaCl with an yield, oil content (OC), and encapsulation efficiency (EE) of 39.91 ± 3.10%, 78.33 ± 7.53%, and 90.27 ± 5.84%, respectively. A spherical shape of LO microcapsules was homogeneously found with an average particle size of 1.394 μm. A first-order kinetics mechanism for the release of LO out of the microcapsules was modeled by Avrami's kinetic equation ( = 1.60 ± 3.68 × 10 s). The LO microcapsules demonstrated good thermal stability up to 100 °C and maintained 51.07% OC and 43.56% EE at ambient temperature for three weeks. Using a pad dry method and citric acid binder, LO microcapsules were successfully immobilized on a cloth with a % add on 30.60 ± 1.80%. The LO microcapsules and the immobilized one exhibited a moderate ZoI of bacterial growth for Gram-positive and as well as Gram-negative and . Further washing test toward the functional fabric showed that the LO microcapsules incorporated into the fabric were resistant to five cycles of normal washing with a mass reduction of 22.01 ± 1.69%.
制备并表征了一种由石灰精油（LO）微胶囊固定化的功能性织物。使用不同量的CaCl交联剂，以海藻酸钠 - 明胶生物聚合物和吐温80乳化剂对LO进行凝聚优化。进一步评估了固定化LO微胶囊对革兰氏阳性菌和革兰氏阴性菌的抗菌效果。优化后的海藻酸钠/明胶基微胶囊通过15%的CaCl有效交联，产率、油含量（OC）和包封率（EE）分别为39.91±3.10%、78.33±7.53%和90.27±5.84%。LO微胶囊呈球形，均匀分布，平均粒径为1.394μm。用阿弗拉米动力学方程（ = 1.60±3.68×10 s）对LO从微胶囊中释放的一级动力学机制进行了建模。LO微胶囊在高达100°C时表现出良好的热稳定性，在室温下三周内保持51.07%的OC和43.56%的EE。采用轧干法和柠檬酸粘合剂，将LO微胶囊成功固定在织物上，增重率为30.60±1.80%。LO微胶囊及其固定化产物对革兰氏阳性菌和革兰氏阴性菌的生长均表现出中等的抑菌圈（ZoI）。对功能性织物的进一步洗涤测试表明，织物中掺入的LO微胶囊耐5次常规洗涤循环，质量减少22.01±1.69%。
