کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7914374 | 1510942 | 2018 | 35 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Stabilization of antioxidant gallate in layered double hydroxide by exfoliation and reassembling reaction
ترجمه فارسی عنوان
تثبیت گالات آنتی اکسیدان در هیدروکسید دو لایه با لایه برداری و واکنش مجدد
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کلمات کلیدی
هیدروکسید دو لایه گالیک اسید، انتشار کنترل شده، فعالیت آنتیاکسیدانی، عکسبرداری،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
چکیده انگلیسی
As for the stabilization of chemically sensitive bioactive molecule in this study, gallic acid (GA) with antioxidant property was intercalated into interlayer space of layered double hydroxide (LDH), which was realized by exfoliation and reassembling reaction. At first, the pristine nitrate-type Zn2Al-LDH in solid state was synthesized via co-precipitation followed by the hydrothermal treatment at 80â¯Â°C for 6â¯h, and then exfoliated in formamide to form a colloidal solution of exfoliated LDH nanosheets, and finally reassembled in the presence of GA to prepare GA intercalated LDH (GA-LDH) desired, where the pH was adjusted to 8.0 in order to deprotonate GA to form gallate anion. According to the XRD analysis, GA-LDH showed well-developed (00l) diffraction peaks with a basal spacing of 1.15â¯nm, which was estimated to be larger than that of the pristine LDH (0.88â¯nm), indicating that gallate molecules were incorporated into LDH layers with perpendicular orientation. From the FT-IR spectra it was found that gallic acid was completely deprotonated into gallate, and stabilized in between LDH lattices via electrostatic interaction. The content of GA in GA-LDH was determined to be around 23â¯wt% by UV-vis spectroscopic study, which was also confirmed by HPLC analysis. According to the in-vitro release of GA out of GA-LDH in PBS solution (pH 7.4) at 4â¯Â°C, GA was sustainably released from GA-LDH nanohybrid up to 86% within 72â¯h. The antioxidant property of GA-LDH was almost the same with that of intact GA which was examined by DPPH. The photostability of GA-LDH under UV light irradiation was immensely enhanced compared to intact GA. It is, therefore, concluded that the present GA-LDH nanohybrid can be considered as an excellent antioxidant material with high chemical- and photo-stabilities, and controlled release property.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solid State Sciences - Volume 80, June 2018, Pages 65-71
Journal: Solid State Sciences - Volume 80, June 2018, Pages 65-71
نویسندگان
Kanakappan Mickel Ansy, Ji-Hee Lee, Huiyan Piao, Goeun Choi, Jin-Ho Choy,