Perrin Louise, Desobry Stephane, Gillet Guillaume, Desobry-Banon Sylvie
Laboratory of Biomolecules Engineering (LIBio), University of Lorraine, 2 Avenue de la Foret de Haye, BP 20163, 54500 Vandœuvre-les-Nancy, France.
SAS GENIALIS Route d'Acheres, 18250 Henrichemont, France.
Polymers (Basel). 2023 Nov 10;15(22):4371. doi: 10.3390/polym15224371.
Cellulose, in the form of cellulose nanocrystals (CNCs), is a promising biomaterial for stabilizing Pickering emulsions (PEs). PEs are commonly formed using low-frequency ultrasound (LFU) treatment and impact CNC properties. The present study investigated the specific effects of LFU treatment on CNCs' chemical and physical properties. CNCs were characterized using dynamic light scattering, ζ;-potential determination, Fourier transform infrared spectroscopy, X-ray diffraction, and contact angle measurement. CNC suspensions were studied using rheological analysis and static multiple light scattering. LFU treatment broke CNC aggregates and modified the rheological behavior of CNC suspensions but did not affect the CNCs' chemical or crystallographic structures, surface charge, or hydrophilic properties. During the storage of CNC suspensions and PEs, liquid crystal formation was observed with cross-polarized light. Hypotheses related to the impact of liquid crystal CNCs on PE stability were proposed.
纤维素以纤维素纳米晶体（CNCs）的形式存在，是一种用于稳定皮克林乳液（PEs）的很有前景的生物材料。皮克林乳液通常使用低频超声（LFU）处理形成，并且会影响纤维素纳米晶体的性能。本研究调查了低频超声处理对纤维素纳米晶体化学和物理性质的具体影响。使用动态光散射、ζ电位测定、傅里叶变换红外光谱、X射线衍射和接触角测量对纤维素纳米晶体进行了表征。使用流变学分析和静态多重光散射对纤维素纳米晶体悬浮液进行了研究。低频超声处理破坏了纤维素纳米晶体的聚集体并改变了纤维素纳米晶体悬浮液的流变行为，但并未影响纤维素纳米晶体的化学或晶体结构、表面电荷或亲水性。在纤维素纳米晶体悬浮液和皮克林乳液的储存过程中，用交叉偏振光观察到了液晶的形成。提出了与液晶纤维素纳米晶体对皮克林乳液稳定性影响相关的假设。
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