| Summary: | 碩士 === 逢甲大學 === 纖維與複合材料學系 === 99 === In order to attain the goals of garbage reduction and recycling, this research employed wasted polyester fiber/ low melting polyester fiber as well as Tencel® fiber/low melting point polyester fiber, which were cleaned, smashed, pelletized, arranged, and heat dried, completing the fiber aggregate for soilless culture. Then, the fiber aggregate was evaluated in terms of air permeability and moisture content, determining the optimum temperature and duration for heat drying was 150℃ for thirty minutes and optimum bulk textile fiber density was 0.04g/cm³.
Fibers featured thermal contraction; based on the outcome of thermal shrinkage test, grains demonstrated a lower thermal contraction when with a size of 1.5cm, determining the optimum grain size was 1.5cm. After the addition of water absorbing fibers, the fiber aggregate was evaluated with air permeability test, water content test, and moisture content dissipation test and the each layer of the soilless medium was determined as follows. Water-absorbing layer was with a thickness of 3 cm and made with 50 wt% of 15D fire-retardant-hollow-crimp polyester fiber, 20 wt% of Tencel® fiber and 30 wt% of low melting polyester fiber. Permeation layer was with a thickness of 1 cm and made with 70 wt% of 15D fire-retardant-hollow-crimp polyester fiber, and 30 wt% of low melting polyester fiber. Moisture layer was with a thickness of 3 cm and made with 40 wt% of 15D fire-retardant-hollow-crimp polyester fiber, 30 wt% of Tencel® fiber and 30 wt% of low melting polyester fiber. Finally, drainage layer was with a thickness of 2 cm and made with 70 wt% of 15D fire-retardant-hollow-crimp polyester fiber and 30 wt% of low melting polyester fiber.
Based on the experimental results, the four layers were all attached with the root-preventing layer to form the final fiber assembly with a thickness of 12.5 cm, after which the medium (i.e., fiber assembly) was evaluated with cutting plantation, plant growing observation, nutrition provision as well as water dissipation, proving that it was suitable medium for plants like Duranta repens L., Codiaeum variegatum Bl., and Lantana camara L.
Furthermore, based on the heat effect test, when the fiber assembly as soilless culture medium for green roof was planted with 80% of Duranta repens L., the temperature of the roof could be deducted 2 to 13.2℃.
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