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CONDUCTIVE MATERIAL AND METHOD FOR PRODUCING SAME, AND BIOELECTRODE

Foreign code F180009341
File No. S2017-1000-N0
Posted date Mar 13, 2018
Country WIPO
International application number 2017JP007280
International publication number WO 2017146247
Date of international filing Feb 27, 2017
Date of international publication Aug 31, 2017
Priority data
  • P2016-036496 (Feb 28, 2016) JP
Title CONDUCTIVE MATERIAL AND METHOD FOR PRODUCING SAME, AND BIOELECTRODE
Abstract [Problem] To provide a conductive material that has a conductive polymer adhered uniformly on the surface of a base material so as to achieve a lower resistance value.
[Solution] Specifically, provided is a conductive material which is obtained by adhering, as a conductive polymer, PEDOT-pTS to a nylon base material or a base material chiefly consisting of silk or a silk-derived component. Also provided by the present invention are: a method for producing said conductive material, the method comprising (1) an adhesion step for adhering a pTS solution containing an oxidative component and p-toluenesulfonate (pTS) to a base material formed of silk fiber or nylon fiber or a base material coated with sericin or fibroin, and (2) a polymerization step for further adhering 3,4-ethylenedioxythiophene (EDOT) to said base material, to which the oxidative component and pTS have been adhered in the adhesion step, so as to cause a polymerization reaction for generating poly(3,4-ethylene-dioxythiophene)-p-toluenesulfonate (PEDDOT-pTS) to occur in the base material to create a state in which PEDDOT-pTS is adhered to said base material; and a bioelectrode that includes the conductive material.
Outline of related art and contending technology BACKGROUND ART
A fusion of the areas of engineering and medical engineering in the art as one although in recent years, fabrication of the alternative device of bodily functions and, for this purpose, first, the potential of the living body is essential to accurately measure. Of the biological measurement of the potential, for example, in measurement of a myoelectric potential, as well as the approach from the outside of the muscles, by measuring the potential from the inside, more precisely the action of the muscle is considered to be able to reproduce.
Thus, flexible and follow the movement of the muscle, the potential from the interior of the muscle can be used as an electrode for measuring as, biological material such as silk fibers (silk), a conductive polymer fibers of the conductive coating, has been developed by the present inventors (for example, Patent Document 1, Non-Patent Document 1 or 2 reference).
Non-Patent Document 1 and Patent Document 1 of the conductive fibers, PEDOT-PSS(Poly(3,4-ethylenedioxythiophene) -polystyrenesulfonate) is used as a conductive polymer, PEDOT-PSS solution containing a conductive substrate by immersing the fibers, the fibers of the substrate while being raised vertically from the conductive solution is traveling between the electrodes is energized, PEDOT-PSS substrate fiber adhering to fix the electro-chemical polymerization, by making use of a so-called electrolytic polymerization is produced. In addition, in Patent Document 2 of the electrically conductive fibers, PEDOT-PSS is used as a conductive polymer, PEDOT-PSS mixed with a binder resin and the resin composition to the substrate is attached to the fibers, drying, heating, hardening or by heating or the like has been produced by polymerization.
In addition, PEDOT-PSS is excellent in electrical conductivity than as a conductive polymer, PEDOT-pTS(poly(3,4-ethylene-dioxythiophene) -p-toluenesulfonate) has been known (for example, see Non-Patent Document 2).
Scope of claims (In Japanese)[請求項1]
絹繊維、又は、ナイロン繊維を材料とする基材、あるいは、セリシン若しくはフィブロインを被覆した基材に、PEDOT-pTS(poly(3,4-ethylene-dioxythiophene)-p-toluenesulfonate)が付着していることを特徴とする、導電性材。
[請求項2]
前記基材は、線状、又は、平面状、であることを特徴とする、請求項1記載の導電性材。
[請求項3]
導電部分の電気抵抗値が、
(1)基材が線状部材の場合は、断面積約2.5x10-4cm2において50kΩ/cm以下であり、
(2)基材が平面状部材の場合を含む(1)以外の場合は、50kΩ/cm以下であることを特徴とする、請求項1又は2に記載の導電性材。
[請求項4]
請求項1~3のいずれか1項に記載の導電性材を含むことを特徴とする、生体電極。
[請求項5]
前記生体電極が、表面用電極であり、かつ、平面状の電極素子の生体組織との接触可能面積は、0.25~100cm2であることを特徴とする、請求項4に記載の生体電極。
[請求項6]
前記生体電極が、表面用電極であり、かつ、線状の電極素子の生体組織との接触可能面積は、0.0004~0.002cm2であることを特徴とする、請求項4に記載の生体電極。
[請求項7]
前記生体電極が、穿刺用電極であり、かつ、電極素子の生体組織との接触可能面積は、0.0004~0.002cm2であることを特徴とする、請求項4に記載の生体電極。
[請求項8]
前記生体電極が、多点電極であることを特徴とする、請求項4~7のいずれか1項に記載の生体電極。
[請求項9]
下記の工程(1)及び(2)を含むことを特徴とする、導電性材の製造方法。
(1) 酸化成分とpTS(p-toluenesulfonate)とを含むpTS溶液を、絹繊維、又は、ナイロン繊維を材料とする基材、あるいは、セリシン若しくはフィブロインを被覆した基材、に付着させる付着工程;
(2) 付着工程(1)において酸化成分とpTSを付着させた基材に、さらにEDOT(3,4-ethylenedioxythiophene)を付着させて、当該基材においてPEDOT-pTS(poly(3,4-ethylene-dioxythiophene)-p-toluenesulfonate)を生成する重合反応を進行させて、当該基材にPEDOT-pTSの付着状態を形成する、重合工程。
[請求項10]
付着工程(1)における酸化成分とpTSの付着は、pTS溶液に基材を浸漬させることにより行われ、又は、pTS溶液を基材に印刷することにより行われる、ことを特徴とする、請求項9に記載の導電性材の製造方法。
[請求項11]
重合工程(2)において、EDOTの付着を行うと共に加熱を行って、PEDOT-pTSへの重合反応を促進させることを特徴とする、請求項9又は10に記載の導電性材の製造方法。
[請求項12]
前記加熱は、50~100℃で、10分~60分間の加熱であることを特徴とする、請求項11に記載の導電性材の製造方法。
[請求項13]
重合工程(2)の後、さらに、PEDOT-pTSが付着した基材を洗浄及び乾燥させる工程を行うことを特徴とする、請求項9~12のいずれか1項に記載の導電性材の製造方法。
[請求項14]
前記酸化成分は、第二鉄イオンであることを特徴とする、請求項9~13のいずれか1項に記載の導電性材の製造方法。
  • Applicant
  • ※All designated countries except for US in the data before July 2012
  • TOHOKU UNIVERSITY
  • Inventor
  • TORIMITSU Keiichi
IPC(International Patent Classification)
Specified countries National States: AE AG AL AM AO AT AU AZ BA BB BG BH BN BR BW BY BZ CA CH CL CN CO CR CU CZ DE DJ DK DM DO DZ EC EE EG ES FI GB GD GE GH GM GT HN HR HU ID IL IN IR IS KE KG KH KN KP KR KW KZ LA LC LK LR LS LU LY MA MD ME MG MK MN MW MX MY MZ NA NG NI NO NZ OM PA PE PG PH PL PT QA RO RS RU RW SA SC SD SE SG SK SL SM ST SV SY TH TJ TM TN TR TT TZ UA UG US UZ VC VN ZA ZM ZW
ARIPO: BW GH GM KE LR LS MW MZ NA RW SD SL SZ TZ UG ZM ZW
EAPO: AM AZ BY KG KZ RU TJ TM
EPO: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
OAPI: BF BJ CF CG CI CM GA GN GQ GW KM ML MR NE SN ST TD TG
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