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SHAPE-CONTROLLED NANOSHEET AND PRODUCTION METHOD THEREOF

Foreign code F160008883
File No. (S2015-0750-N0)
Posted date Oct 25, 2016
Country WIPO
International application number 2016JP056706
International publication number WO 2016140334
Date of international filing Mar 4, 2016
Date of international publication Sep 9, 2016
Priority data
  • P2015-043990 (Mar 5, 2015) JP
Title SHAPE-CONTROLLED NANOSHEET AND PRODUCTION METHOD THEREOF
Abstract The purpose of the present invention is to provide a nanosheet which can maintain a planar shape, and a production method thereof. A multilayer structure sheet which comprises a nanosheet layer and an elastic layer and which has a rolled structure, and a production method thereof, are provided.
Outline of related art and contending technology BACKGROUND ART
Polymer ultra-thin film (hereinafter, ' nano-sheets' referred to) of a polymer such as polylactic acid is several hundred - several tens nm and a sheet having a thickness of, from its thin profile and flexibility, the shape of the skin or the surface of the organ, even without an adhesive can be adhered by van der Waals force and surface tension.
This feature the nanoparticles from the sheet, and the affected the incision wound as a protective material used to stick (non-patent document 1, 2). Is further in recent years, nanosheets, in endoscopic surgery can be used as the material conveying, the transplantation of the cells into the living tissue (retina lower) used as a graft substrate such as surgery, the use of in vivo have been developed in a narrow environment, has been studied (non-patent document 3-5).
On the other hand, nano-sheets is thin, because it is pliable, when bent downward or in a liquid, to recover the planar shape not to itself. Therefore, suppresses deformation of the nano-sheets, and maintain the planar shape, are attached to the site of interest is not easy. Further the site of interest in the living body is in an environment where the narrow, directly operated by the nanosheet is impossible, while maintain the planar shape becomes more difficult to be attached.
Therefore, the nanosheets in the art while controlling/maintain the planar shape, conveniently, they are attached to the site of interest to enable new means been desired earnestly.
Scope of claims (In Japanese)[請求項1]
ナノシート層及び伸縮層を含み、捲回構造を備える多層構造シートの製造方法であって、
(i)ナノシート層を、ひずみを生じさせ内部応力を付与した伸縮層に積層し、多層構造を形成する工程、
(ii)次いで、該多層構造における該伸縮層の該ひずみを回復させ、それによって該多層構造を捲回する工程を含む、
上記方法。
[請求項2]
多層構造シートが支持層をさらに含み、工程(i)において、支持層/ナノシート層/伸縮層の順で積層するか、又は、ナノシート層/支持層/伸縮層の順で積層する、請求項1に記載の方法。
[請求項3]
工程(i)において、引張力を加えて引張ひずみを生じさせ内部応力が付与された伸縮層に支持層(存在する場合)及びナノシート層を積層する、請求項1又は2に記載の方法。
[請求項4]
工程(ii)において、多層構造を伸縮層に引張力が加えられた環境より切り取り、切り取られた多層構造における伸縮層の引張ひずみを回復させ、それによって該切り取られた多層構造を伸縮層と支持層(存在する場合)及び/又はナノシート層との間の内部応力の差に基づいて捲回する、請求項3に記載の方法。
[請求項5]
ナノシート層及び伸縮層を含み、捲回構造を備える、多層構造シート。
[請求項6]
支持層をさらに含み、支持層/ナノシート層/伸縮層の順で積層されているか、又は、ナノシート層/支持層/伸縮層の順で積層されている、請求項5に記載の多層構造シート。
[請求項7]
ナノシート層が500nm未満の厚みを有する、請求項5又は6に記載の多層構造シート。
[請求項8]
支持層(存在する場合)及び/又は伸縮層が250μm未満の厚みを有する、請求項5~7のいずれか1項に記載の多層構造シート。
[請求項9]
支持層(存在する場合)及び伸縮層が水溶性高分子からなる、請求項5~8のいずれか1項に記載の多層構造シート。
[請求項10]
支持層(存在する場合)及び伸縮層がポリビニルアルコールからなる、請求項5~9のいずれか1項に記載の多層構造シート。
  • Applicant
  • ※All designated countries except for US in the data before July 2012
  • TOHOKU UNIVERSITY
  • Inventor
  • IWASE Eiji
  • SHIMBO Sota
  • TAKEOKA Shinji
  • FUJIE Toshinori
  • KAJI Hirokazu
  • ABE Toshiaki
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 DK DM DO DZ EC EE EG ES FI GB GD GE GH GM GT HN HR HU ID IL IN IR IS JP KE KG KN KP KR 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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