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A kind of micro-actuator and its preparation method

A kind of actuator and miniature technology, which is applied in the direction of microstructure technology, microstructure device, microelectronic microstructure device, etc. It can solve the problems of single response type, failure to work, small deformation, etc.

Active Publication Date: 2019-05-07
珠海荣友新材料技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the currently implemented actuators respond to a single type of stimulus
In addition, the bending of many previous hydrogel actuators is generally in a single direction, and the deformation amount is relatively small; moreover, the developed hydrogel system generally needs to work normally in a relatively high humidity, even in water, and in a drier environment down, not working

Method used

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  • A kind of micro-actuator and its preparation method
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  • A kind of micro-actuator and its preparation method

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preparation example Construction

[0051] The present invention also provides a method for preparing the aforementioned micro-actuator, comprising the following steps:

[0052] Borax is mixed with carbamate-grafted polyvinyl alcohol aqueous solution to obtain borax slightly cross-linked carbamate-grafted polyvinyl alcohol aqueous solution;

[0053] A micro-actuator is obtained by coating the aqueous solution of polyvinyl alcohol grafted with carbamate slightly cross-linked by borax on the surface of the inert layer and then performing heat treatment.

[0054] The present invention firstly prepares an aqueous solution of carbamate-grafted polyvinyl alcohol, specifically, mixes carbamate-grafted polyvinyl alcohol with water, and stirs vigorously until dissolved to obtain carbamate-grafted polyvinyl alcohol aqueous solution. Wherein, the water is preferably deionized water.

[0055] Wherein, the mass concentration of the carbamate-grafted polyvinyl alcohol in the carbamate-grafted polyvinyl alcohol aqueous solut...

Embodiment 1

[0071] Polyvinyl alcohol, dimethyl sulfoxide and carbonyldiimidazole are mixed for an activation reaction to obtain activated polyvinyl alcohol, wherein the molar ratio of polyvinyl alcohol to carbonyldiimidazole is 1:0.5; the activation reaction The temperature is 20-30°C.

[0072] The activated polyvinyl alcohol with a molar ratio of 1:0.5 was reacted with N,N-diethyl-1,2-diamine for 100 hours to obtain carbamate-grafted polyvinyl alcohol.

[0073] Through testing, the measured grafting rate is 25%.

Embodiment 2

[0075] Take 50 mg of urethane-grafted polyvinyl alcohol (PVA-DEEDA) prepared in Example 1, add 5 milliliters of 18 megohm deionized water, stir vigorously at 10 degrees Celsius for 12 hours, and configure a mass fraction concentration of 1% amine The polyvinyl alcohol (PVA-DEEDA) aqueous solution of carbamate grafting; The above-mentioned PVA-DEEDA is divided into 5 parts, every part of 1 milliliter, add respectively 0 milligram, 1 milligram, 3 milligrams, 5 milligrams, 8 milligrams of borax (Na 2 B 4 o 7 10H 2 O), stirred at 10 degrees Celsius for 30 minutes. The above solutions are respectively named as PVA-DEEDA-0Borax (corresponding to the PVA-DEEDA aqueous solution without borax), PVA-DEEDA-1Borax (corresponding to the PVA-DEEDA aqueous solution adding 10% borax), PVA-DEEDA-3Borax (corresponding to adding 30% The PVA-DEEDA aqueous solution of borax), PVA-DEEDA-5Borax (corresponding to the PVA-DEEDA aqueous solution with 50% borax added) and PVA-DEEDA-8Borax (correspond...

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Abstract

The invention provides a micro-actuator, comprising an inert layer and an active layer compounded to the inert layer, wherein the active layer is prepared from borax and carbamate grafted polyvinyl alcohol. The micro-actuator provided by the invention has responses to both temperature and humidity, has relatively low requirements for working environments, and can be operated in a wider range of temperature and humidity. In addition, compared to an original shape, the actuator can realize 360-degree bending in two directions of a positive angle and a negative angle. The micro-actuator provided by the invention can be used to manufacture micro-precision temperature and humidity sensitive devices that are suitable for certain special environments requiring fine, soft and / or moisture states.

Description

technical field [0001] The invention belongs to the technical field of intelligent materials, and in particular relates to a micro-actuator and a preparation method thereof. Background technique [0002] Organisms in nature are "intelligent" and respond quickly to external environmental stimuli. For example, a carpel (a plant) can be stimulated by temperature and humidity to sow seeds; another example is a pine cone that opens in dry conditions to release ripe seeds and closes in high humidity to release seeds. prevent seed release. Imitating the response of organisms to external humidity and temperature can develop advanced materials and devices such as artificial biological sensing systems, artificial muscles, and intelligent "chemical" responsive switches. This is the current frontier field and has been widely used in the field of soft micro robots application. [0003] Robots are currently receiving more and more attention. However, most traditional mechanical robots...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B81B3/00C08J3/24C08F8/32C08F116/06C08L29/04
CPCB81B3/0018B81B2201/0278C08F8/32C08J3/24C08J2329/04C08F116/06
Inventor 高粱孔腾飞霍延平
Owner 珠海荣友新材料技术有限公司
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