摘要:
The invention concerns nanocapsules, in particular with an average size less than 50 nm, consisting of an essentially lipid core liquid or semiliquid at room temperature, coated with an essentially lipid film solid at room temperature having a thickness of 2-10 nm. The invention also concerns a method for preparing same which consists in producing a reverse phase of an aqueous emulsion brought about by several temperature raising and lowering cycles. Said lipid nanocapsules are particularly designed for producing a medicine.
摘要:
The invention concerns nanocapsules, in particular with an average size less than 50 nm, consisting of an essentially lipid core liquid or semiliquid at room temperature, coated with an essentially lipid film solid at room temperature having a thickness of 2-10 nm. The invention also concerns a method for preparing same which consists in producing a reverse phase of an aqueous emulsion brought about by several temperature raising and lowering cycles. Said lipid nanocapsules are particularly designed for producing a medicine.
摘要:
Provided is a method for preparing nanocapsules having a liquid lipid core and a solid shell and charged in their lipid core with at least one hydrophilic active agent involving combining microemulsions where the active agent remains in the hydrophilic phase of a first microemulsion and chill-hardening the mixture to obtain the nanocapsules charged with the hydrophilic active agent. The nanocapsules comprise the lipid core which is liquid at room temperature and the nanocapsules are encapsulated in a film which is solid at room temperature.
摘要:
The present invention relates to a useful method for preparing nanocapsules having a liquid lipid core and a solid shell and charged with at least one active agent having a hydrophilic character, said method comprising at least the steps consisting in: i) providing at least a first microemulsion having a water-in-oil character, stabilized by at least one lipophilic surfactant and containing in its hydrophilic phase at least one active agent having a hydrophilic character, providing at least a second microemulsion, separate from the first microemulsion, formulated by phase inversion of an emulsion and stabilized by at least one heat-sensitive, nonionic hydrophilic surfactant; iii) adding said first microemulsion to said second microemulsion under conditions propitious for the formation of a novel microemulsion architecture in which said hydrophilic active agent remains present in the hydrophilic phase of the first microemulsion; and iv) chill-hardening the mixture formed in the previous step, so as to obtain nanocapsules comprising said hydrophilic active agent and being formed from a lipid core, which is liquid at room temperature, and encapsulated in a film which is solid at room temperature.Further, the invention relates to nanocapsules which are able to be obtained by said method.
摘要:
A process for preparing nanocapsules with a liquid lipid core and a solid lipid shell, charged with at least one active agent. The process contains at least the steps of formulating a microemulsion by phase inversion of an emulsion, totally or partially forming from at least one active agent a second composition different than the microemulsion, placing the microemulsion in contact with the second composition under conditions suitable for interaction of the active agent with the microemulsion, and chill-hardening the microemulsion that has interacted with the active agent, to obtain the nanocapsules.
摘要:
The invention relates to nanocapsules with a liquid lipidic core and a solid lipidic shell, the lipidic core being loaded with at least one water-soluble or water-dispersible ingredient, said ingredient being present in the form of a reverse micellar system.
摘要:
The present invention relates to a method for use in the preparation of nanocapsules which have a liquid lipid core and a solid lipid shell and which are loaded with at least one active agent, wherein said method comprises at least the steps consisting in providing a microemulsion formulated by phase inversion of an emulsion, providing a second composition, distinct from said microemulsion and completely or partly formed from at least one active agent, placing said microemulsion in the presence of said second composition under conditions suitable for the interaction of said active agent with said microemulsion and annealing said microemulsion having interacted with said active agent in such a way as to obtain said nanocapsules. The invention also relates to a corresponding kit.
摘要:
The invention relates to nanocapsules with a liquid lipidic core and a solid lipidic shell, the lipidic core being loaded with at least one water-soluble or water-dispersible ingredient, said ingredient being present in the form of a reverse micellar system.
摘要:
The invention relates to a composition comprising in an aqueous phase, particles having a diameter in the range of 20 to 500 nm, said particles containing:—an oil phase;—in said oil phase,—an aqueous droplet, or—a nanocapsule (NC) comprising:—an aqueous core, and—a polymeric shell or a shell composed of an amphiphilic substance; and—a surfactant. This composition is particularly useful for encapsulating hydrophilic and/or lipophilic substances.
摘要:
The invention relates to a composition comprising in an aqueous phase, particles having a diameter in the range of 20 to 500 nm, said particles containing:—an oil phase;—in said oil phase,—an aqueous droplet, or—a nanocapsule (NC) comprising:—an aqueous core, and—a polymeric shell or a shell composed of an amphiphilic substance; and—a surfactant. This composition is particularly useful for encapsulating hydrophilic and/or lipophilic substances.