However, W/O HIPEs have rarely been realized using sustainable biopolymers. In particular, high internal phase Pickering emulsions (HIPEs) are of great interest for diverse applications. Hydrophobic particles with static water contact angles larger than 90° are more like to stabilize W/O Pickering emulsions. Pang, Bo Liu, Huan Liu, Peiwen Peng, Xinwen Zhang, Kai Water-in-oil Pickering emulsions stabilized by stearoylated microcrystalline cellulose. SEM results indicated that both microsphere and porous materials were fabricated using emulsion stabilized by unmodified HAp nanoparticles, implying that both W/O and O/W emulsion type were obtained. The interaction between HAp and PLLA played an important role to stabilize Pickering emulsions. Stable W/O and O/W emulsions were fabricated successfully using as-received HAp particles as stabilizer by adjusting the fabricating parameters. The results indicated emulsion stability increased with the increase of HAp concentration, emulsification rate and time it is very stable when pH value of aqueous phase was adjusted to 10. Effect of PLLA concentrations, pH value, HAp concentrations, oil-water ratio, emulsification rates and times were studied on emulsion stability and emulsion type, etc. Pickering emulsion was cured via in situ solvent evaporation method. Hydroxyapatite (HAp) nanoparticle stabilized Pickering emulsion was fabricated with poly(l-lactic acid) dissolved in dichloromethane (CH 2 Cl 2 ) solution as oil phase and HAp aqueous dispersion as aqueous phase. Zhang, Ming Wang, Ai-Juan Li, Jun-Ming Song, Na Song, Yang He, Rui We also provide future perspectives on their applications, such as drug delivery, food, and composite materials.įactors influencing the stability and type of hydroxyapatite stabilized Pickering emulsion. In this review, the preparation and properties of nanocellulose- stabilized Pickering emulsions are summarized. chemical stability, biodegradability, biocompatibility, and renewability). Among various solid stabilizers, nanocellulose may open up new opportunities for future Pickering emulsions owing to its unique nanosizes, amphiphilicity, and other favorable properties (e.g. Pickering emulsion, which is an emulsion stabilized by solid particles, offers a wide range of potential applications because it generally provides a more stable system than surfactant- stabilized emulsion. We also provide future perspectives on their applications, such as drug delivery, food, and composite materials. The PCM composite can be extended to panels used in energy-efficient smart buildings with thermal regulation integrated in load-bearing structures.Nanocellulose- stabilized Pickering emulsions and their applicationsįujisawa, Shuji Togawa, Eiji Kuroda, KatsushiĪbstract Pickering emulsion, which is an emulsion stabilized by solid particles, offers a wide range of potential applications because it generally provides a more stable system than surfactant- stabilized emulsion. No obvious leakage was observed during heating/cooling cycles, as supported by DSC and SAXS data. The thermal regulation function of the PCM composite was demonstrated in the form of a model roof under simulated sunlight. Morphology was characterized using FE-SEM. The PCM composite was lightweight and showed a solid content of paraffin of more than 72 wt%. Particle formation was characterized by dynamic light scattering and they were processed into stable PCM/CNF composites in the form of PCM paper structures with favorable mechanical properties. The thermodynamic drive for phase separation was confirmed by molecular modeling. Here, paraffin was encapsulated by nanocellulose (CNF) through a pickering emulsion method, while simultaneously forming a composite material. Non-leaking, green materials with high content of phase change materials (PCM) can conserve solar energy and contribute to a sustainable society. The PCM paper is a promising structural candidate for smart building applications.The PCM paper shows good thermal regulation and mechanical property without leakage.The thermodynamic drive for capsules formation was confirmed by molecular modeling.The capsules formation and dispersion in CNF matrix are completed in one step.CNF enabled paraffin encapsulation through an aqueous pickering emulsion method.
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