| Summary: | 碩士 === 國立臺北科技大學 === 有機高分子研究所 === 95 === Due to the change of natural environment, the excessive indoor decoration and the NI amount in the modern living environment has already been greatly reduced. In addition, the tremendous development of computers, communications, and control equipment, large amounts of positively charged cations are produced which could seriously threaten modern people’s health. Therefore, disease in the population has become more common recently. In view of this, submicron Negative-Ion(NI) powders and excited materials were adopted in this research. The submicron NI powders and excited material powders were treated with a dispersing agent and a ball mill used first, then it was blended evenly into water-borne polyurethane(PU) by a planetary deaerate stirring machine, and finally the water-borne PU composite films were coated onto release paper with a coating rod. The main purpose of this work is to manufacture a permanent composite film which is able to release NIs. Such film is expected to not only release amounts of NI but also absorb smells and effectively create fresh air.
The submicron NI powder composite films were used as samples in this study. The added amount of submicron NI powder and thickness was taken as factors to investigate the number of static and dynamic negative ion per cubic centimeter released by the sample, the rise and fall of FIR temperature, the Reflection Index and Tensile, etc. It has been shown that the number of NI per cubic centimeter, and the rise of FIR temperature, were increased by increasing the added amount of submicron functional and excited powders. The water-borne PU composite film of 0.14 mm thickness with 30wt% mineral NI powder and 30wt% excited functional powders could release about 2000 Ions/cm3. The composite films were put into a 25cm×25cm×25cm airtight acrylic box that can control the temperature and relative humidity. On each occasion there was hung a single piece sample (625cm2), altogether 5 of these samples (3125cm2) were fitted, and the area of 5 piece NI amounts generated the best results. The composite film release of dynamic NI amounts are 88,530 Ions/cm3, In positive and negative ion counteraction, and NI amount release to reach -Ions/cm3, has the function of enhancing human body immunity. Furthermore, for warm ability of water-borne PU composite film, the FIR temperature rise was around 2~6℃; and the Reflection Index would reach around 0.91. Such data shows that the water-borne PU composite film has already met the requirements for a healthy body.
By using a control material testing machine with the servo computer, water-borne PU composite film samples were tested to snap into two split and extensible forms. The experimental results show that, added amounts of NI powders and excited material powders with specific ratio directly affect the materials’ strength and tenacity. It was found that altogether three phases through the mixing system were needed to blend the NI powder that reduced the material of its tensile strength and tensile modulus.
Water-borne PU composite films possessing the ability of releasing sufficient NIs, and having FIR warm ability and high Reflection Index, could be suitable for utilization in autumn and winter dresses, underwear, socks, shoes, handbags, suitcases, sofas, while also enhancing products in automobiles, mattresses, ventilators, coatings, etc.
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