(Most relevant in last 5 years)

1. Building materials from Industry Wastes

Mining and metallurgical processing industries generate high volume solid wastes such as acidified iron oxide sludge, acidic silica sand, red gypsum, foundry mould sand, flyash, rice husk silica and low grade calcium oxide. These industry wastes are  predominantly contains inorganic oxides including alumina, silica, magnesia, titania and iron oxide. Hence they are promising alternate to natural clay based raw material.  Traditional brick and tile industries consume natural clays for making terracotta tiles and fired bricks.  It is important to preserve the natural clays and explore industry wastes for making any building materials. CSIR NIIST has identified reactive colloidal silicate binders dispersed and stabilized in acrylic polymer medium that consolidate the inorganic industry wastes into bricks and tiles.  The industry wastes can also be converted to porous aggregates by introducing suitable pore formers

Bricks with different shades and sintered porous aggregates for light weight concrete

2. Multi-channelled Ceramic Membranes for Micro/Ultra filtration Applications

Asymmetric ceramic membranes by virtue of properties like high chemical, mechanical and thermal stability possess unique advantages over polymeric counterparts in micro/ultrafiltration applications. Ceramic materials possessing unique features such as chemical resistance, durability and cost effectiveness are employed for membrane fabrication. CSIR-NIIST developed single layer coatings on porous alumina supports for micro/ultrafiltration with enhanced flux values. Sugarcane juice clarification tests at IIT Guwahati indicated turbidity removal of 99.5 % . A pre-pilot plant is setup at HR Johnson, Mumbai under DST (Department of Science and Technology)funding. The technology was realised in collaboration with CSIR-CGCRI, Kolkata.

3. Development of Alkali Silicate Based Ceramics as CO2 Sorbents

Alkali silicate ceramics are potential candidates for CO2 capture in the temperature range of 300-700°C. CSIR-NIIST in collaboration with Noritake, Japan develop ceramic sorbents for the in situ removal of CO2 from industrial environments in the 350-700°C temperature range. Absorption capacity of 150-250 mg/g in the temperature range of 350-650°C. Patented Process (CSIR and Noritake Japan). Scaled up to pre-pilot level. Ready to use sorbent granule through extrusion-spherediosation process

4. LTCC Tapes and Conductive Inks

NIIST has rich experience in developing LTCC tapes suitable with ?r: 5-20 and tan? < 10-3 at 10 GHz. NIIST has also developed the competency in developing screen printable inks of various functionalities like conductive (Ag, Cu, graphene, CNT), semiconducting, dielectric (TiO2 & SiO2, piezoelectric (PMN-PT, PZT, BTO and KNN) and magnetic (Fe, Co, Ni and Permalloys).

5. Automatic Hand-Sanitizer Dispenser

    Technology at a Glance:

  • Automatically dispense adequate amount of sanitizing liquid to user’s palm (1-5ml, with preset adjust)
  • No false triggering issues
  • Drip type nozzle with less wastage of sanitizer liquid
  • 1 Litre storage capacity with refilling option
  • Low power consumption (2W)
  • Operates in 110-240V AC/9V battery
  • Can dispense various sanitizing liquids such as gels, foams or soap solution
  • Sanitizer level indicator and power indicator LEDs
  • Table top/wall mount installation type with sleek design
  • Suitable for indoor as well as outdoor applications
Technology has been transferred to M/s. Tachlog Pvt. Ltd, Trivandrum on 28th May 2020

6. Self-Sterilizing Printed Fabric Heaters for Application in Reusable Personal Protective Equipments

A low-power consuming, self-sterilizing fabric heater by printing of custom developed thick film conductive silver ink formulations on fabric substrates for annihilating pathogens by resistive heating at a sterilization temperature of 120°C. Further, the fabric heater device has been integrated with a stopgap face mask having a reusable cartridge, in which the cartridge comprises of a self-sterilizing fabric layer in addition to other filter layers for annihilating pathogens by resistive heating, enabling on-line protection at 70°C as well as offline protection at 120°C. In addition, the present invention relates to the development of conductive aqueous based printable silver ink formulation as the heating element of fabric heater device, which comprises of silver flakes and/or silver particles and its vehicle carrier, wherein the carrier consists of a eutectic mixture co-solvent, binders, dispersants, anti-foamer, wetting agent and thixotropic agent.  The design of the self-sterilizing fabric heater has been optimized for energy efficient heating with full and partial coverage designs of heating element over fabric substrate. The sterilization temperature for fabric heater has been achieved through a DC voltage source with less than 0.25W/cm2 power consumption by fine-tuning the resistance and thickness of heating element printed on fabric substrate. (Patent Filed)

7. Removal of Azo Reactive Dyes from Aqueous Solutions using Flyash-Fe3O4-Ag and Flyash-Fe34-Ag-Cu Magnetic Composite Particles via Persulfate Activation

Magnetic Flyash (FA)-Fe3O4, FA-Fe3O4-Ag, and FA-Fe3O4-Ag-Cu composite particles have been synthesized via the combination of inverse co-precipitation, UV-reduction, and electroless coating techniques. The composite particles have been utilized as catalyst for the removal of industrial azo reactive dyes, such as Corafix Red ME4B, Corazol Golden Yellow, and Corazol Black BX from the aqueous solutions, via the activation of persulfate (S2O82-) anions at room temperature. The pore volume of as received FA particles is very low (0.0092 cm3 g-1).  However, FA-Fe3O4, FA-Fe3O4-Ag, and FA-Fe3O4-Ag-Cu composite particles exhibit relatively higher pore volume of 0.1465, 0.1654, and 0.0794 m2 g-1 respectively which enhances the dye adsorption capacity of these particles relative to that of bare FA particles. The thermal and catalytic activation of S2O82- anions results in the generation of sulfate (SO4•-) and hydroxyl (OH) radicals which are responsible for the attack and degradation of dye molecules. Within the initial dye concentration range of 0.03-0.3 g l-1, all three azo reactive dyes have been decomposed via the advanced oxidation process in less than 60 min. All composite catalyst particles are superparamagnetic in nature with the saturation magnetization values of 9.43, 5.74, and 9.65 emu g-1 respectively which are larger than that (1.56 emu g-1) of bare FA particles. Hence, all composite particles could be separated from the treated aqueous solutions using an external magnetic field. The OH trapping experiments conducted via the photoluminescence (PL) experiments using the terephthalic acid (TA) as a trapping agent shows that the OH concentration is reduced significantly in the presence of composite particles which in turn suggests that OH also contribute to the regeneration of composite catalyst particles. The deposition of Cu along with Ag has been noted to benefit not only in enhancing the saturation magnetization value but also in reducing the need for the post activation carbon (AC) treatment to reduce the final COD level of the treated dye solution.

8. Two-Step and One-Step Dye-Removal Methods of Novel Dark-Catalysis Process Involving Chemical Activation of Hydrogen Peroxide (H2O2) using Hydrothermal Synthesized Hydrogen Titanate (H2Ti3O7) Nanotubes

The nanotubes of H2Ti3O7 (HTN) have been synthesized via the roll-up mechanism using the hydrothermal treatment of nanocrystalline anatase-titania (TiO2) under the highly alkaline conditions at 120oC for 30 h followed by the washing of the hydrothermal product via two-step washing procedure involving the aqueous solution of HCl and pure H2O. The H2Ti3O7 nanotubes possess an unique property of activating the H2O2 in an aqueous solution under the dark-condition without the use of an external radiation or power-source. Such activation results in the generation of large concentration of superoxide radical-ions (O2•-) and hydroxyl radicals (OH) which can decompose the organic synthetic-dye adsorbed on the surface of nanotubes. The dye-removal process can be conducted via either two-step process or one-step process. In the two-step dye-removal process, the dye is adsorbed on the surface of nanotubes in one aqueous solution and then decomposed in another aqueous solution containing the strong oxidizer such as the H2O2. In the one-step dye-removal process, the dye is simultaneously adsorbed and decomposed on the surface of nanotubes in an aqueous solution containing both the dye and the strong oxidizer such as H2O2.

9. Rare earth phosphate based non- reactive and non- wettable surfaces for molten metals
(Patent Filed, 2737/DEL/2014, 24/09/2015)

10. A Superhydrophobic Composite and Multifunctional Applications Thereof
(Patent Filed, 202011038721, 2020)

11. Flocculant based disinfection process for pathogenic medical waste disposal
(Patent filed, 0142NF2020, Indian Patent 202011039050, 2020)

12. Process on Porous silica aerogels from low-cost sodium silicate for thermal insulation 

13. Process know-how on IR reflective ceramic colorants for solar heat reflective coatings

Research Highlights


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