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   Technology and Product Development

    Basic Information

Technology developed: A process for immobilization of metal oxide or metal hydroxide nanofillers in paper matrices by a ra (TP19768178046)
Category: Product(Hardware/Material/Software)
Details of Inventor(s):
Inventor Institution/Organization/Company Department Designation
Paritosh Mohanty Indian Institute of Techonology Roorkee Chemistry Associate Professor
Sudiksha Aggrawal Indian Institute of Techonology Roorkee Chemistry Research Scholar
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Metal oxides such as CuO, ZnO, Fe2O3, CoO, NiO, TiO2 and metal hydroxides such as Ni(OH)2, Cu(OH)2 etc. have been immobilized on the surface of the cellulose fibers of the paper matrices using single step, facile, rapid microwave assisted method. Without using any retention aids, linkers or binders, high retention capacity of nanofillers around 75 to 80 per cent have been achieved. The retention of nanofiller content in the paper sheets have been estimated by combustion test and thermogravimetric analysis and found out to be comparable with each other. Structural and microstructural analysis of the cellulose fibers and metal oxide or hydroxide nanofillers have been carried out using XRD and XPS analysis. Microstructural analysis of the nanofillers have been carried out using FESEM analysis and wide range of morphologies have been observed. Nanoparticles ranging from 20 to 150 nm diameter have been synthesized using this methodology. The recyclability of retention of nanofiller till 5 cycles indicates negligible loss in the retention capacity. The methodology of immobilization of nanofillers in the paper sheets could open up avenues in the paper industries for higher retention of nanofillers without any additional cost of linkers, binders or retention aids.
Indian Institute of Technology (IIT) Roorkee
Affiliated Ministry: DST, Govt. of India
Type of technology development: Indigenous
Does the technology help in replacing any import items currently
procured from outside India?
Does the technology have export potential? Yes
Category of Technology developed: Futuristic
Stage of Development: Lab-scale
Please describe in detail including the TRL Level:
In this invention, a rapid microwave assisted approach have been used for the immobilization of metal oxides or metal hydroxides nanofillers in the paper matrices. The immobilization of nanofillers was achieved within a time period varying from 5 to 60 min. There is no use of linkers, binders or retention aids in this process. Different metal oxides such as ZnO, TiO2, Fe2O3, CuO and metal hydroxides such as Ni(OH)2 have been immobilized on the cellulose fibers of the paper matrices using this process through formation of permanent covalent bond between hydroxyl group of cellulose fibers and nanofillers. High retention capacity of nanofillers, upto 80 per cent have been achieved. There is negligible leaching of nanofillers from the paper matices which was estimated by multiple paper redispersing and paper fabricating cycles. These functionalized paper matrices can further be used for different applications such as antimicrobial activity, catalysis, photocatalysis, supercapacitor etc.


Applications: This invention can be used for the rapid immobilization of different metal oxides and metal hydroxides nanofillers in paper matrices using microwave assisted method Retention of the fillers being a major challenge can be addressed to some extent by using linker, binder, or retention aid Use of these block the active sites and compromise in the applications High retention of nanofillers in paper matrices without using linkers/retention aids/binders which could hinder with active sites and could add cost to the final product Developed methodology facilitates immobilization of metal oxides/hydroxides nanofillers in paper matrices through formation of covalent bond between hydroxyl group of cellulose fibers and nanofillers CuO nanostructures can be immobilized within short reaction time of 5 min only Negligible leaching of nanofillers from the paper matrices Different high-end application papers can be prepared such as antimicrobial, phocatalytic, catalytic, sensors etc.
Advantages: In this invention, an ultrafast microwave assisted method is reported where the immobilization of various metal oxides nanofillers could be possible with a short experimental time of 30 to 60 min only. Even the methodology works for different metal salts that could substantially reduce the cost of the final products. Additional advantages include the substantial improvement of the retention capacity more than 50 per cent higher than the hydrothermal method and more than 200 per cent than the conventional method of incorporation of metal oxide fillers without using the retention aids. The substantial reduction of the experimental time, no use of linker, binder or retention aid and an improved retention capacity in the present invention could be highly beneficial for the industrial application of the process and products.

    Technology Inputs:

Imported Equipment/Spare Parts:
Equipment/Spare Parts Year ITC-HS Code
Indigenous Equipment/Spare Parts:
Equipment/Spare Parts Year ITC-HS Code
Imported Raw Materials:
Raw Materials Year ITC-HS Code
Indigenous Raw Materials:
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Existing R&D Facilities used:
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    R&D Investment:

R&D investment (Rs. in Lakhs):                    
Indian Source (Rs.) Foreign Source (Rs.) Year
0 0 NA

   Patents & Publications:

Filed Patents (No.) Granted Patents (No.) Year
2147483647 0 NA
Submitted (No.) Published (No.) Year
0 0 NA

    Commercialization Potential:

Who are the Potential Licensees?
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the same problem?
Company Product Problem Addressed
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      Submitted by: Akshay Dvivedi Date of Submission: 5-8-2020

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