Fabrication of Magnetically Actuated Fluidic Drug Delivery Device Using Polyvinyl Chloride Adhesive Stencils

In this paper, a polydimethylsiloxane (PDMS) fabrication method is introduced. It eliminates the need for conventional fabrication methods, such as photolithography and etching. Only a series of oxygen plasma treatments, silanization, and polyvinyl chloride (PVC) adhesive stencils were used to develop multi-layer designs. The fabrication method was applied to fabricate a PDMS-based drug delivery device with an actively controllable, magnetically actuated valve. Above all, this fabrication method eliminated the use of a power-consuming pump. Fluidic substances were injected into the circular shaped primary chamber through a syringe. A secondary chamber, similar to the primary chamber’s structure but with a smaller radius and thinner membrane, was connected via a microchannel to regulate the amount released. When actuated with a permanent magnet for one second, the volume in the secondary chamber first depletes. As the magnet is removed, the valve closes. Subsequently, the primary chamber replenishes the secondary chamber. This process can be repeated until the primary chamber reaches a saturation state that can no longer inflate the secondary chamber. The device could release a few microliters per actuation. Various combinations of size and thickness of primary, and secondary chambers can realize release rate of desired amount.

DESIGN AND DEVELOPMENT OF USED AL-QURAN PAPER DISPOSAL SYSTEM

The idea of this project was to design and fabricate a combustion chamber of incinerator for Quran paper burning with a capacity of 10 kg/h, which is heated by Liquefied Petroleum Gas, LPG as fuel for the burner. This small capacity 10kg/h incinerator is portable type. The focus customers are Department of Islamic Development, Malaysia, JAKIM and other Islamic authority in Malaysia that can dispose the Quran used paper with their own facility without sending out to third parties. The customer can reduce space, cost and time because the storage and transport are not required. This incinerator is a retort type consist of primary and secondary chambers. The secondary chamber is further divided into mixing and combustion sections . The function of secondary chamber is to provide complete combustion to Quran paper burning process. The temperature for primary chamber is set of range from 200 to 218 degree Celsius. This design is fabricated based on standard stated by Environment Authority.