Halloysite nanotube (HNT)-encapsulated ionic liquid (IL) microcapsule, self-lubricating fiber textile composite, and preparation method and use thereof

A preparation method of a halloysite nanotube (HNT)-encapsulated ionic liquid (IL) microcapsule, comprising the following steps:

• dispersing a HNT and an alkali metal salt of a saturated fatty acid in water, and selectively modifying an inner surface of the HNT to obtain an inner surface-modified HNT;
• wherein
• the alkali metal salt of the saturated fatty acid is one or more selected from the group consisting of sodium laurate, sodium undecanoate, and sodium myristate;
• and
• the HNT and the alkali metal salt of the saturated fatty acid are at a mass ratio of (0.1-1):1;
• dispersing the inner surface-modified HNT and an IL in an organic solvent to obtain a mixed dispersion;
• injecting the IL into the HNT in the mixed dispersion under vacuumizing to obtain an IL-filled HNT;
• and
• encapsulating the IL-filled HNT at a tube end with an encapsulating material to obtain the HNT-encapsulated IL microcapsule.