TY - JOUR AU - MOHD RAJIDI, Fadhlin Sakina AU - AZIZ, Iman Nur Fathihah Abdul AU - MUSA, Mazlina AU - YAHAYA, Rozita PY - 2021/06/28 Y2 - 2024/03/28 TI - Structural, Thermal and Surface Properties of a Formulated Sunscreen: Zn/Al-nitrate Layered Double Hydroxide Intercalated with 4-aminobenzoic Acid JF - Walailak Journal of Science and Technology (WJST) JA - Walailak J Sci & Tech VL - 18 IS - 13 SE - Research Article DO - 10.48048/wjst.2021.9939 UR - https://wjst.wu.ac.th/index.php/wjst/article/view/9939 SP - Article 9939 (10 pages) AB - <p>Intercalation of 4-amino benzoic acid (4-AB) into Zn/Al-nitrate layered double hydroxide (ZAL2) to form Zn/Al-4AB (ZALAB) compound was successfully synthesized from nitrate salt by using direct co-precipitation method. ZALAB compound was confirmed by Powder X-ray diffraction (PXRD) pattern with a basal spacing of 15.3 Å. The presence of COO<sup>- </sup>and C<sub>6</sub>H<sub>5</sub>NH<sub>2</sub> functional groups of 4-AB at 1,517 and 1,178 cm<sup>–1</sup> in Fourier transform infrared (FTIR) spectrum reinforced 4-AB intercalated into the resulting compound. Based on the thermal analysis, 4-AB in ZALAB compound was more stable compared to pure 4-AB. Breuneur, Emmet and Teller/Barret-Joyner-Halenda (BET/BJH) analyses demonstrated that ZALAB compound is a mesopores-type IV compound with 4.25 m<sup>2</sup>/g surface area. This material is an irregular shape with different sizes of particles. ZALAB is a potential sunscreen formulation that minimizes the harmful effect on the skin, improving pharmaceutical technology in the skincare treatment.</p><p><strong>HIGHLIGHTS</strong></p><ul><li>4-amino benzoic acid (4-AB) is a sunscreen composed of carboxylic and aromatic groups that potentially filter UV-B radiation</li><li>Layered double hydroxide (LDH) is known as an ionic clay that is based on the brucite (Mg (OH)<sub>2</sub>) -like cations layers containing intercalated charge-balancing anions and water</li><li>Intercalation of 4-amino benzoic acid (4-AB) into Zn/Al-nitrate layered double hydroxide (ZAL2) to form Zn/Al-4AB (ZALAB) was synthesized using direct co-precipitation method</li><li>ZALAB material has a higher thermal stability compared to 4-AB in pure form</li></ul><p><strong>GRAPHICAL ABSTRACT<br /><img src="https://wjst.wu.ac.th/public/site/images/admin/2-web.png" alt="" width="1903" height="916" /><br /></strong></p> ER -