論文第三部分為電磁波吸收型水性PU奈米複合材料之製備與應用，將水性PU與碳包奈米鐵粉，奈米碳管與奈米鐵加工製成導電型複合材料，利用TGA，DMA等技術測試其物理性質，並利用網路分析儀量測其電磁特性，研究中製備的水性PU奈米複合材料，其介電係數獲得大幅提升，同時材料的柔軟度及熱穩定性也獲得提升，有效增加材料的應用性。 In the first part of this discourse, a fluorinated acrylate monomer, octafluoropentylmethacrylate (OFPMA) was synthesized from a reaction between methacrylol chloride and fluorine containing alcohol. The fluorine containing acrylate co-polymer (OFPMA-MA) was prepared by a solution copolymerization of OFPMA and methyl acrylate (MA). An inter-penetrating polymeric network (IPN) system was formulated by mixing fluorine containing co-polymer OFPMA-MA and UV curable epoxy acrylate oligomer. The UV-curable IPN system was coated on fabric surface and cured by UV radiation process. Upon UV curing, the highly cross-linked polymer anchored into fabric fibers that enhance the washing durability of treated fabric. The water repellency of the treated fabric surface was exhibited that related to its fluorine content of UV-cured IPN system. Their surface properties were proved by the contact angle measurements and Kawabata fabric evolution system (KES-FB). With the optimum coating treatment, the contact angle of textile could reach over 130° and remain the efficiency after 50 washing cycles. In the second part of this discourse, a UV-curable PDMS-containing polyurethane (PU) oligomer (UV-PDMS-PU), having a PDMS moiety is designed for textile (PET, Nylon and Cotton) surface treatment with a long lasting hydrophobic property. Polydimethylsiloxane (PDMS) is a super-hydrophobic material with low surface energy. UV-PDMS-PU was prepared by an addition of 2-hydroxyethyl methacrylate (2-HEMA) to NCO-terminated PDMS-containing PU pre-polymer (NCO-PDMS-PU). NCO-PDMS-PU was obtained from an addition reaction of alkyl hydroxyl-terminated PDMS with an excess amount of isophorone diisocyanate (IPDI). The UV-cured PDMS-containing PU films were evaluated by the measurements of thermal and physical properties. The hydrophobic characters and silicone content were remained on textile surface after water washing cycles, which indicating that UV-curing process can help the PDMS moiety to anchor onto textile fibers. With the optimum coating treatment, the contact angle of textile could reach over 150° and remain the efficiency after 50 washing cycles.
In the third part of this discourse, a polymeric composite materials with highly conductivity are prepared by the blending of aqueous-based polyurethane (PU) as a matrix and with three different types nano-size materials. These three nano-materials are carbon-coated nano-iron particles, nano-iron metal particles, and carbon-nanotubes. The thin films of composite materials are obtained from the drying of these PU dispersion blends at ambient temperature. The conductivity (ε) and permeability (μ) of these composite films are measured by a network analyzer. The thermal and mechanical properties are measured by TGA and DMA, respectively. Among these measurements and find out the PU film with carbon-nanotube behaving the highest dielectric constant on the broad-band (3~18GHz) range. It also proves that the iron metal particles reach to nano size, the magnetic properties of its composite material shifts from ferromagnetic to paramagnetic characters.