Log in
Show password
Forgot password ?
Become a member for free
Sign up
Sign up
New member
Sign up for FREE
New customer
Discover our services
Dynamic quotes 
  1. Homepage
  2. Equities
  3. Japan
  4. Japan Exchange
  5. Nippon Shokubai Co., Ltd.
  6. News
  7. Summary
    4114   JP3715200006


SummaryMost relevantAll NewsAnalyst Reco.Other languagesPress ReleasesOfficial PublicationsSector news

Nippon Shokubai : Development of an antibacterial and antiviral graphene oxide composite membrane with high water resistance - Inactivating various bacteria and viruses including SARS-CoV-2, to improve wet area sanitation -

10/13/2021 | 10:12pm EDT
Oct. 14, 2021

NIPPON SHOKUBAI CO., LTD. (Headquarters: Osaka, Japan, President: Yujiro Goto, hereinafter "Nippon Shokubai") and a group led by Dr. Hirofumi Miyaji from the Department of Endodontics and Periodontics, Hokkaido University Hospital, have developed a graphene oxide composite membrane with inactivation effects on various bacteria and viruses including SARS-CoV-2, which causes COVID-19. The graphene oxide composite membrane comprising graphene oxide and an antibacterial/antiviral agent can function as an antibacterial/antiviral membrane even in a wet environment.

[Characteristics of the graphene oxide composite membrane]
・Useful in environments requiring both water resistance and antibacterial/antiviral properties
・Selectable for various antibacterial/antiviral agents
・Colorless and transparent, without losing the color tone of the base material

Graphene oxide is a type of nanocarbon material and has a high aspect ratio sheet structure with 1 nm thickness and several micrometers width (Fig. 1). The effectiveness of graphene oxide has been confirmed in various uses, and it is expected to be put into application in a wide range of fields. However, mass production on an industrial scale has been difficult. Using our techniques to safely and stably control chemical reactions in chemical production that we have accumulated to this day, Nippon Shokubai has solved various issues in graphene oxide mass production, and established mass production technology.

Graphene oxide has a high adhesiveness to various base materials, and also strongly interacts with various molecules, polymers, etc. by utilizing its shape and rich oxygen-functional groups. Utilizing these properties of Graphene oxide, it can improve the interaction between the base material and substances which have low adhesive properties. Therefore it can lead to water resistance and long-term stability (Fig. 2).

In the field of antibacterial/antiviral agents and applications, it has been necessary to develop a technology that exhibits antibacterial/antiviral effects with long-term stability and high water resistance by a simple method. However, general disinfection methods and antimicrobial/antiviral methods have a low water resistance, making it difficult to maintain antimicrobial/antiviral effects in a wet environment.
Nippon Shokubai and Dr. Miyaji's group developed the composite membrane combining graphene oxide and antibacterial/antiviral agents such as benzalkonium chloride. We confirmed that the composite membrane has a strong intercalation between the antibacterial/antiviral agents and the base material across the graphene oxide. From this effect, the antibacterial/antiviral agents on graphene oxide were reinforced even in a wet environment therefore, the composite membrane works as an antibacterial/antiviral membrane with resistance to water washing and wetting (Fig.3).
Furthermore, the graphene oxide membrane is a colorless and transparent monolayer membrane, and does not reduce the color tones of various base materials (Fig. 4).

To further verify its antibacterial/antiviral properties, Nippon Shokubai and Dr. Miyaji's group conducted an antiviral property evaluation using the novel coronavirus (SARS-CoV-2 which causes COVID-19).

[Experimental method]
The antibacterial/antiviral capacity of the following four samples after washing with water was analyzed for antibacterial/antiviral capacity.
・ Substrate only (control, with washing)
・ Only graphene oxide on substrate (with washing)
・ Only benzalkonium chloride on substrate (with washing)
・ Graphene oxide-benzalkonium chloride composite membrane on substrate (with washing)

Only the graphene oxide-benzalkonium chloride composite membrane shows a strong antiviral effect, and the effect with graphene oxide only or benzalkonium chloride only was weaker (Fig. 5). It shows that the water resistance is improved by compositing graphene oxide and antibacterial/antiviral agents.
We also confirmed that the graphene oxide composite membrane remains even in the sample that was stored in water for 1 month.

The graphene oxide composite membrane can be applied to a wide range of bacteria and virus species, because graphene oxide can be combined with various antibacterial/antiviral agents selected to suit the target bacteria or virus. We also confirmed the effect against various bacteria and viruses other than the novel coronavirus.
Utilizing this colorless and transparent graphene oxide composite membrane, it is expected that the antibacterial/antiviral effects can be maintained for a long period without losing the color tone of base materials, even with environments or materials for which both water resistance and antibacterial/antiviral properties are required. Graphene oxide composite membranes can be applied to wet area environments such as sinks and bathrooms, and window glass and sashes which tend to have condensation.


Nippon Shokubai Co. Ltd. published this content on 14 October 2021 and is solely responsible for the information contained therein. Distributed by Public, unedited and unaltered, on 14 October 2021 02:11:02 UTC.

© Publicnow 2021
All news about NIPPON SHOKUBAI CO., LTD.
10/19NIPPON SHOKUBAI : Notice to stop the old facilities of superabsorbent polymers
10/13NIPPON SHOKUBAI : Development of an antibacterial and antiviral graphene oxide composite m..
09/29NIPPON SHOKUBAI CO., LTD. : Ex-dividend day for interim dividend
09/29NIPPON SHOKUBAI CO., LTD. : Anniversary bonus dividend
08/24NIPPON SHOKUBAI : Price increase for Superabsorbent Polymers
08/19NIPPON SHOKUBAI : Joint Study to Commence on the Supply of Ethylene Derivatives derived fr..
07/30NIPPON SHOKUBAI : Establishment of a Green Innovation Department to achieve carbon neutral..
07/08NIPPON SHOKUBAI : Obtains ISCC PLUS for Bio-based Superabsorbent Polymers -To Contribute t..
06/09NIPPON SHOKUBAI : Receives the Technology Award from the Catalyst Manufacturers Associatio..
06/08NIPPON SHOKUBAI : Clinical Research on Knee Osteoarthritis using MicoCell 3D Cell Culture ..
More news
Analyst Recommendations on NIPPON SHOKUBAI CO., LTD.
More recommendations
Sales 2022 307 B 2 682 M 2 682 M
Net income 2022 18 700 M 163 M 163 M
Net Debt 2022 11 728 M 102 M 102 M
P/E ratio 2022 12,5x
Yield 2022 2,14%
Capitalization 233 B 2 042 M 2 037 M
EV / Sales 2022 0,80x
EV / Sales 2023 0,76x
Nbr of Employees 4 555
Free-Float 72,3%
Duration : Period :
Nippon Shokubai Co., Ltd. Technical Analysis Chart | MarketScreener
Full-screen chart
Technical analysis trends NIPPON SHOKUBAI CO., LTD.
Short TermMid-TermLong Term
Income Statement Evolution
Mean consensus OUTPERFORM
Number of Analysts 4
Last Close Price 5 850,00 JPY
Average target price 7 150,00 JPY
Spread / Average Target 22,2%
EPS Revisions
Managers and Directors
Yujiro Goto President & Representative Director
Takashi Kobayashi Executive Officer & General Manager-Finance
Masao Yamamoto Representative Director & Senior Head-IT
Jiro Iriguchi Representative Director & Head-Technology
Kuniaki Takagi Director, GM-Personnel & Senior Head-IT
Sector and Competitors