
Division of Chemistry and Cosmetics, Dongduk Women’s University, Seoul 02748, Korea
동덕여자대학교 화학·화장품학부
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Tocopherol-loaded nanostructured lipid carriers (NLCs) were incorporated into hydrogels formulated with various polymeric thickeners. The stability, rheological properties, and texture of the hydrogel formulations were compared according to the type of polymeric thickener, and the effects of interactions between polymers and NLCs on the final hydrogel properties were investigated. The Herschel–Bulkley model was applied to the shear rate–shear stress curves of the hydrogel formulations to calculate rheological parameters such as the shear-thinning index and yield stress. In formulations based on alkyl acrylate crosspolymers, nonpolar van der Waals interactions between the alkyl chains of the polymer and the fatty acid chains of the phospholipids constituting the NLC strengthened the network structure, leading to increased viscosity and hardness of the formulations. In contrast, the cationic polymer chitosan induced aggregation and complex formation through electrostatic interactions with the anionic surfactants contained in the NLCs, resulting in decreased formulation stability.
토코페롤이 포집된 나노구조 지질담체(NLC)를 다양한 고분자 증점제를 사용한 하이드로젤 제형에 적용하였다. 고분자 증점제의 종류에 따른 하이드로젤 제형의 안정성, 레올로지 특성 및 텍스처를 비교하였으며, 고분자와 NLC 간의 상호작용이 최종 하이드로젤 특성에 미치는 영향을 분석하였다. 전단 속도-전단 응력 곡선에는 Herschel-Bulkley 모델을 적용하여 전단박화 지수 및 항복응력과 같은 레올로지 파라미터를 도출하였다. 알킬 아크릴레이트 크로스폴리머 기반 제형에서는 고분자의 알킬 사슬과 NLC를 구성하는 인지질의 지방산 사슬 간 비극성 반데르발스 상호작용에 의해 네트워크 구조가 강화되었으며, 이에 따라 점도와 경도가 증가하였다. 반면, 양이온성 고분자인 키토산의 경우 NLC 내 음이온성 계면활성제와의 정전기적 상호작용을 통해 응집 및 복합체 형성을 유도하여 제형의 안정성을 저하시켰다.
Keywords: nanostructured lipid carriers, hydrogel, polymeric thickener, rheological characteristics, texture.
This Article2026; 50(3): 477-485
Published online May 25, 2026
Correspondence toDivision of Chemistry and Cosmetics, Dongduk Women’s University, Seoul 02748, Korea