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সিএসআইআর - সেন্ট্রাল মেকানিক্যাল ইঞ্জিনিয়ারিং রিসার্চ ইনস্টিটিউট, বিজ্ঞান ও প্রযুক্তি মন্ত্রণালয়, ভারত সরকার सीएसआईआर - केंद्रीय यांत्रिक अभियांत्रिकी अनुसंधान संस्थान, विज्ञान और प्रौद्योगिकी मंत्रालय, भारत सरकार CSIR - Central Mechanical Engineering Research Institute, Ministry of S&T, Govt. of India
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Last updated : 4 Oct, 2019

Large Scale Production of Graphene Oxide

Type:  Product
IPR Status:  Patent
Secured In:  India
Application/uses: 

Graphene oxide is extensively used in energy storage devices, polymer composites, desalination of water, conducting ink, aqueous lubrication, nano-coolant, additive for phase change materials, etc. Problem being addressed: The cost of commercially available graphene oxide is very high (Rs. 35,000 for 0.2 g) and thus it is very difficult to use it in the aforesaid areas. Therefore, scaled-up production of graphene oxide at reasonable price without compromising the quality is a challenging task. The developed technology demonstrates the production of graphene oxide starting from natural flake graphite (200 g/batch) without pre-treatment.

Salient Technical Competing Features: 

Production yield = 80% Thickness = 1-1.8 nm Number of layers: Few layer (3-4 layers) Dispersible in water and most of the polar organic solvents Oxygen content = 25-28%

Environmental Consideration: 

Sulphuric acid is used for the oxidation of graphite. The un-reacted acid is stored in a tank, so, there is no environmental concern. Graphene oxide is not toxic and hazardous for the environment.

Status of Commercialization:  200 g/batch
Major Raw Materials To Be Utilized :  Natural flake graphite (preferably 100 mesh), sulphuric acid, potassium permanganate, hydrogen peroxide, hydrochloric acid.
Major Equipments:  Mechanical stirrer, Glass reactor (customized design), distilled water plant, freeze dryer
Techno Economic:  Available on enquiry basis.
Technology Package:  CSIR-CMERI will not provide raw materials and the equipment required for the graphite oxide production, purification, drying, storage, etc.
Content Details: 

CSIR-CMERI scientist will demonstrate the graphene oxide production technology (200 g graphite oxidation/batch) at the site of the customer. CSIR-CMERI scientist will also help to buy the machinery/equipment, raw materials, glass ware etc are to be provided to for setting up the process plant.

Scaled-up production of graphene oxide at reasonable price without compromising the quality is a challenging task. The developed technology demonstrates the production of graphene oxide starting from natural flake graphite (200 g/batch) without pre-treatment.

Level/Scale of Development:  200 g/batch