Coiled actuator system and method

A method of generating a plurality of coiled actuator fibers, with each of the plurality of coiled actuator fibers being generated by:

• twisting a fiber to generate a twisted fiber having a fiber bias angle αfiber between 25° and 50°;
• wrapping the twisted fiber around a sacrificial core to generate a coil in the twisted fiber;
• setting the highly twisted fiber coil by applying heat or a chemical setting agent to the twisted fiber coil disposed on the sacrificial core;
• and
• removing the sacrificial core by dissolving the sacrificial core in a solvent to generate a coiled actuator fiber having two or more the following characteristics:
• a coil spring index (C) greater than or equal to 2.0,
• a coil portion contact temperature greater than or equal to 20° C.,
• a thermal response of |CTE|2 mm/m/K, and
• a fiber bias angle αfiber between 25° and 50°.

A method of generating a coiled actuator fiber comprising:

• twisting a fiber to generate a twisted fiber;
• wrapping the twisted fiber around a core to generate a coil in the twisted fiber;
• setting of the coiled actuator fiber by heat or chemical treatment;
• and
• removing at least a portion of the core to generate a coiled actuator fiber.

A method of generating a coiled actuator fiber comprising:

• twisting a fiber to generate a twisted fiber;
• wrapping the twisted fiber around a core to generate a coil in the twisted fiber;
• and
• removing at least a portion of the core to generate a coiled actuator fiber, wherein the coiled actuator fiber comprises a coil spring index (C) greater than or equal to 2.0.

A method of generating a coiled actuator fiber comprising:

• twisting a fiber to generate a twisted fiber;
• wrapping the twisted fiber around a core to generate a coil in the twisted fiber;
• and
• removing at least a portion of the core to generate a coiled actuator fiber, wherein the coiled actuator fiber comprises a coil portion contact temperature greater than or equal to 10° C.

A method of generating a coiled actuator fiber comprising:

• twisting a fiber to generate a twisted fiber;
• wrapping the twisted fiber around a core to generate a coil in the twisted fiber;
• and
• removing at least a portion of the core to generate a coiled actuator fiber, wherein the coiled actuator fiber comprises a thermal response of |CTE|≥2 mm/m/K.

A method of generating a coiled actuator fiber comprising:

• twisting a fiber to generate a twisted fiber;
• wrapping the twisted fiber around a core to generate a coil in the twisted fiber;
• removing at least a portion of the core to generate a coiled actuator fiber, wherein the core is removed through
• a. dissolution;
• b. chemical reaction;
• c. or combinations thereof and wherein the core further comprises a non-removable portion that is not dissolvable or chemically reactive under the same conditions as the removable portion, leaving a portion of the core.

A method of generating a coiled actuator fiber comprising:

• twisting a fiber to generate a twisted fiber;
• wrapping the twisted fiber around a core to generate a coil in the twisted fiber;
• and removing at least a portion of the core to generate a coiled actuator fiber,
• wherein twisting the fiber to generate the twisted fiber comprises twisting the fiber to have a fiber bias angle αfiber greater than 25°.