Annual Reports of the Board of Selectmen Treasurer, and Supervisor of Schools of the Town of Greene, for the Year Ending March 6, 1896

An in situ method for sealing an array of pre-filled micro-cavities, such as encountered in electrophoretic displays, is presented. The technique, which is based on photoembossing, forms a hermetic seal between the cover and the cavity walls. The seal locations are defined by ultraviolet exposure through a photolithographic mask, forming a latent image overlapping with the locations of the cavity walls. During a thermal development step, while the cover is mounted on top of the micro-cavities, the seal evolves and makes firm contact with the cavity walls. This technology is demonstrated to be insensitive to small deviations in cavity height, flatness of the cover and thin fluid films remaining between the cover and the top of the cavity walls. In the past, these aspects made it difficult to effectively seal large-area devices

Methodologies for high-performance electrospun fibers

Electrospinning is a rapidly growing polymer processing technology as it provides a viable and simple method to create ultra-fine continuous fibers. This paper presents a review of the mechanical properties of electrospun fibers and particularly focuses on methodologies to generate high strength and high modulus nanofibers

Electrospinning of high-performance co-polyimide nanofibers

Co-polyimide nanofibers based on BPDA (3, 3′, 4, 4′-Biphenyltetracarboxylic dianhydride)/PDA (p-Phenylene-diamine)/ODA (4, 4′-Oxydianiline) are fabricated through electrospinning and imidization from its precursor polyamic acid (PAA). The resulting nanofiber bundles show high Young's moduli and tensile strengths of 38±0.3 GPa and 1630±15 MPa, respectively

PA6 nanofibre production: A comparison between rotary jet spinning and electrospinning

Polymer nanofibres are created from many different techniques, with varying rates of production. Rotary jet spinning is a relatively new technique for making nanofibres from both polymer solutions and melt. With electrospinning being by far the most widespread processing method for polymer nanofibres, we performed a direct comparison of polyamide 6 (PA6) nanofibre production between these two methods. It was found that electrospinning produced slightly smaller-diameter fibres, which scaled with a decrease in solution viscosity. In comparison, rotary jet spun fibres could be produced from a reduced range of polymer concentrations and exhibited therefore slightly larger diameters with greater variation. Crystallinity of the fibres was also compared between the two techniques and the bulk polymer, which showed a decrease in crystallinity compared to bulk PA6

The influence of laser writing of polyimides on the alignment of liquid crystals

The influence of laser writing of polyimides on the alignment of liquid crystals was studied. Laser writing offers the possibility towards computer controlled generation of patterns with high speed and large design flexibility. Utilizing this method, hybrid electro-optical cells featuring areas with a different liquid crystal alignment than the non-patterned bulk can be created