Tech Bundle

Air Cleaning

Reactive Oxygen Generating Additive For Antimicrobial Protection And Air Purification
This technology is derived from photodynamic therapy and uses a photosensitizer molecule as the active agent for long-lasting, anti-microbial effect and air purification. This photosensitizer relies on the activation by light irradiation to produce active oxygen and reactive oxygen species (ROS) which can kill bacteria, viruses, fungi and mold, as well as disintegrate volatile organic compounds (e.g. formaldehyde) on contact.   The molecule is a conjugated compound based on an extraction from plant-based polylysine and an edible mineral. This technology disrupts the traditional use of toxic chemicals to kill microbes by replacing it with a safer, reactive oxygen generating catalytic molecule. It is effective against microbe contamination, minimising transmission of diseases. The technology has been formulated into various applications such as paints, textiles, hygiene products and polymeric films to name a few.
Dilution Air Processing Unit for Reduced Transmission of Airborne Infectious Diseases
The Dilution Air Processing Unit (DAPU) is an ideal solution for small and medium businesses to prepare themselves for the Covid-19 new normal by employing an enhanced air ventilation technique. The DAPU system allows the creation of zones (e.g. sickbays, waiting rooms, etc.) within workplaces with no recirculation of air. This prevents cross-contamination of unclean air in between the zones. This solution is suitable for hotels and other premises to be used for quarantine purposes. The DAPU consists of the following key features: Provides 100% fresh air supply with no recirculation Reduces airborne particles exposure by greater than 60% Achieves 25% energy efficiency in providing 100% fresh air supply as compared to conventional systems Uses fully portable modular approach Can be easily retrofitted to any existing air-conditioning system resulting in lower implementation cost The DAPU can also be deployed in any area without an existing air-conditioning system making it highly versatile.
Anti-viral Materials Containing Copper (I) Oxide and Visible-light Photocatalyst
Transmission of viruses may occur through contaminated surfaces, where viruses can remain active for varying periods of time, from hours to several days, on different materials. To lower the possibility of spread of infections through contact with high-touch surfaces such as elevator buttons, grocery carts and door knobs, antimicrobial materials such as silver and copper ions are currently utilised. However, these solutions face challenges such as low durability and longer time needed to inactivate viruses. To overcome these challenges, durable anti-viral materials containing Copper (I) Oxide (Cu2O) and visible-light photocatalyst are developed. These materials are demonstrated to be able to inactivate >99% of viruses within an hour, even in environments without light. Using patented dispersion techniques, the active Cu2O and visible-light photocatalyst materials remain as stable, nano-sized particles on the outermost surfaces of products that incorporate them. This provides a large reaction surface area for high performance and durable anti-viral property.
Plasma Generator for Air Sanitisation
The technology developed herein is related to an plasma generator which generates reactive oxygen species to eliminate bacteria, viruses, harmful gases and odourous substances. Indoor environments, such as hospital rooms or livestock pens, can greatly benefit from the improved air quality to reduce the harm of diseases and pollution. Air sterilisers developed using the plasma generator can safely and effectively remove: Harmful gases such as ammonia, formaldehyde, acetaldehyde, acetic acid, toluene and volatile organic compounds Suspended bacteria that stick to dust or water vapour Viruses including influenza viruses (H2N2) and other toxic ultrafine infectious particles The technology has been applied in livestock farms to eliminate odours as well as maintaining the freshness of fresh produce. The technology provider is interested to seek collaborators who are keen to develop new applications for the plasma generator. The mode of collaboration could be licensing or joint research agreements. 
Self-assembled Nanofibrous Air Filter
Air pollution poses serious health threats. Even limited exposure to air pollutants, such as during haze periods, can trigger respiratory symptoms and aggravate existing heart or lung conditions. While there is a strong need for economical and effective technologies for air filtration, most nanofibres currently used in air filters require intensive energy and specialised equipment to produce. The research team has developed a novel nanofibre solution for clean and fresh air. The novel nanofibre solution is applied to non-woven mesh to create thin, see-through air filters that can remove up to 90% of PM2.5 particles and achieve a high air flow that is 2.5 times better than conventional air filters. This nanofibre solutions is easy and quick to produce, offering a cost-effective alternative to currently available air filter solutions.
Acoustic-Aided Air Filter for Enhanced Filtration and Reduced Energy Consumption
Typically, buildings with centralised air-conditioning have one or more air filters in each of the air handling units. While air filtration plays an important role to improve indoor air quality, it requires a significant amount of energy consumption to achieve high filtration efficiency, which is the extent to which filters remove airborne particles. In a conventional air filter, energy consumption can account for up to 80% of the total lifecycle cost of operating the filter. Air filters generally remove smaller airborne particles with a lower level of filtration efficiency, and densely packed filter media is typically used to remove these very fine particles, which results in a high pressure drop across the filter. Air filters with densely packed fibre material, such as the High Efficiency Particulate Air (HEPA) filter, are both costly and energy intensive. While efforts have been made to refine the structure of air filters to reduce the pressure drop, the physical limits of fluid mechanics means that there is a need for a technology that facilitates a further reduction of the pressure drop, especially in high efficiency air filters. This patented technology greatly enhances the air filter performance while reducing the energy consumption of the filtration process. It utilises acoustic energy to induce the rapid vibration of the particles in the air, which can enhance the filtration efficiency of an air filter from 70% to 90%.
Stable, Plant-based Photoactive Antimicrobial Agent
Antimicrobial resistance developed due to the overuse of conventional antimicrobial agents in surface coatings and consumer products is a global concern for treatment of infectious diseases in recent years. To address this concern, US FDA has banned the use of a number of conventional antimicrobial agents in consumer and healthcare products such as hand soaps and hand sanitisers. This raises the importance of alternative antimicrobial agents in antiseptic products. Photoactive antimicrobial agents are effective alternatives which produce highly reactive oxygen species (ROS) when activated by light. These reactive oxygen species display broad-spectrum biocidal activity that destroy microbes by a multi-targeted killing mechanism, which may limit the development of antimicrobial tolerance or resistance. The researchers have developed a stabilised form of a plant-based antimicrobial agent to protect it from environmental degradation. The enhanced environmental stability of this natural photoactive antimicrobial agent has made it suitable to be incorporated in various materials for the self-sterilising product applications and may provide a “greener solution” to limit the spread of pathogens and transmission of infections by indirect contact.
Coating with Odourless Microorganisms to Improve Indoor Air Quality
Air-conditioning systems are indispensable for human daily life. Clean air is recognised as an integral component in human health and well-being while offensively smelling or polluted air severely spoils a pleasant environment. However, microbial activity and offensive odours in indoor air continue to be an issue in indoor environments such as in automobiles or airplanes. Although various types of fragrances are commercially available for removing offensive odours, they do not fundamentally remove the moulds and bacteria proliferating on the evaporator core but merely dilute the unpleasant odour temporarily. Also, the antibacterial agents that are commercially available at present are not developed to specifically act on particular moulds or bacteria proliferating on the evaporator core. To address this, an eco-friendly air purification technology was developed using a biofilm coating containing odourless microorganisms to improve indoor air quality, in particular, in air-conditioning systems such as in automobiles.
Polymeric Resin Additive Paste to Achieve Photocatalytic Effect in Indoor Environments
Photocatalytic effect is a crucial element for achieving self-cleaning surfaces in an indoor environment. Self-cleaning surfaces minimise the need for labour intensive and costly cleaning and maintenance services. However, commercially available self-cleaning solutions are typically in the form of coatings that wear off with time and require re-application, which is costly and time consuming. In view of the limitations of such self-cleaning coatings, a polymeric resin additive paste that enables long term photocatalytic effect using visible light has been developed.