Fabrication of single-sided and double-sided rough surface film and their applications on detecting multi-directions airflow and human tiny motion.

• Main Authors: WANG, TING-CHIEN, 王婷謙
• Other Authors: CHEN,CHIEN-CHUNG
• Format: Others
• Language: zh-TW
• Published: 2019
• Online Access: http://ndltd.ncl.edu.tw/handle/x2f928

碩士 === 國立中正大學 === 化學工程研究所 === 107 === This study contains two parts. The first part is the fabrication of detectable airflow and human body motion sensor by carbon nanotubes and styrene-isoprene-styrene block copolymer (SIS). First, SIS/CNT suspension is sprayed on glass substrate with rough pattern to obtain SIS/CNT film with rough surface. The film with rough surface is fabricated an airflow sensor. The sensor is applied normal direction airflow at a fixed flow. As the distance increases, the change of resistance decreases from 0.48 to 0.12. The sensor is applied shear direction airflow at a fixed flow and the resistance is rising. As the distance increases, the resistance changes from 1.04 to 0.18. An anemometer that detects multiple directions is prepared because the sensor can detect airflow in the forward, angled, and shear directions. The multi-directional anemometer detects the airflow, and the anemometer is blowing E (east wind) or NE (northeast wind). The relative resistance change is indicated by the custom coordinate axis. The direction of the vector can determine the wind direction and the vector length determine the wind speed. In the second part, carbon nanotube and styrene-isoprene-styrene block copolymer (SIS) is used mesh as a mold to fabricate double-sided rough film by a simple method. In this study, we use 6 wt% and 12 wt% SIS/CNT to prepare smooth and double-sided rough 1 layer, 2 layers and 3 layers sensor. 3 layers sensor performed the best. The maximum resistance change of the 6 wt% sensor is 0.99, the resistance change rate is 5.0 kPa-1. The maximum resistance change of the 12 wt% rough three-layer sensor is 0.83, and the resistance change rate is 5.9 kPa-1. Thus, the 6 wt% rough 3 layers sensor is used for the detection of human motion such as finger bending, small angle bending, nodding, smiling, swallowing and breathing. The sensor detects breathing and develops a sleep apnea system. The breath can be detected in real time and the alarm sounds when the breath is severely stopped.