PDMS / PSf二氧化碳增濃複合薄膜用於植物生長之研究

十八世紀工業革命後，產業蓬勃發展造就經濟奇蹟，人們生活更加便利，在此同時工業生產與人類生活大量排放溫室氣體，溫室氣體排放已嚴重造成全球氣候異常，因此近年來許多研究利用各種技術捕捉溫室氣體企圖改善日趨嚴重的全球暖化，在眾多被評估的技術中以薄膜技術最具發展潛能。糧食是人類賴以生存最基本的要素，全球暖化氣候異常將造成農業生產降低，產生另一威脅人類生存的糧食危機，若能利用溫室氣體加速農作物生產，則可解決糧食危機並減緩暖化所造成之氣候異常。近年薄膜分離技術越來越受到重視，因此我們希望藉由薄膜技術來捕捉大氣中主要的溫室氣體二氧化碳，本研究製備二氧化碳增濃薄膜，農業運用需供應大量之二氧化碳增濃空氣，因此本研究製備複合薄膜確保提供足夠之氣體通量，原始PDMS/PSf 複合薄膜之二氧化碳增濃效能無法達到促進農作物生長的要求標準(CO2 濃度大於800ppm)，因此本研究透過UV/O3 表面處理及熱處理改質複合薄膜表面，製備能滿足設定標準之二氧化碳增濃薄膜。研究結果顯示，支撐材PSf 薄膜透過端二氧化碳濃度約為452ppm，薄膜氣體通量約為44320GPU，經由塗佈PDMS 選擇層並調整交聯劑濃度、UV/O3 處理時間及熱處理條件，改質的PDMS/PSf 複合薄膜，二氧化碳氣體通量大幅降至2336GPU，不過二氧化碳濃度卻提升至814ppm。 FESEM、 FTIR、SEM-EDX、XPS、WCA 等鑑定被用來分析PDMS/PSf 複合薄膜改質之機制，研究中亦將所製備之薄膜實際應用於溫室栽培農作物，以證明增濃二氧化碳空氣促進農作物生長之效果，本研究結果顯示二氧化碳增濃薄膜應用於促進農作物生長相當具有發展潛力。

關鍵字

二氧化碳

並列摘要

After the industrial revolution in the 18th century, due to the extensive factory, greenhouse gases such as carbon dioxide (CO2), methane (CH4), ozone (O3) and nitrogen oxides (NOX) were produced which have caused serious global climate and affect the people’s lives. Therefore, many researchers have used various technologies to capture the greenhouse gases to improve global warming. Food is the most basic factor for human survival. Global warming climate anomalies will reduce agricultural production and create another food crisis that threatens human survival. In recent years, membrane separation technology has received more and more attention. Therefore, we hope to use membrane technology to capture carbon dioxide. Carbon dioxide enriched air is used to promote the photosynthesis of crops to accelerate the growth of crops and shorten the production cycle of crops. Both food shortage and global warming can be solved by carbon dioxide enrichment cultivation. In this study, carbon dioxide-enriched composite membranes were prepared and used in agriculture to supply a large amount of carbon dioxide concentrated air. The carbon dioxide concentration of the original PDMS/PSf composite film is increased. But the efficiency cannot meet the requirements for promoting the growth of crops (CO2 concentration is greater than 800ppm). So we use different methods to modified the composite membrane. The results show that the concentration of carbon dioxide in permeate of the support PSf membrane is about 452 ppm, and the gas flux is about 44320 GPU. After coating PDMS and adjusting the concentration of cross-linking agent, UV/O3 treatment time and heat treatment conditions, the PDMS/PSf composite membrane, the CO2 gas flux decrease to 2336 GPU, but the carbon dioxide concentration increased to 814 ppm. FESEM, FTIR, SEM EDX, XPS, WCA, etc., were used to analyze the PDMS/PSf composite membrane. In the study, the prepared film was actually applied to greenhouse cultivation crops to prove that enriched carbon dioxide air promoted crops. The results of this study show that carbon dioxide enrichment membrane has considerable potential for the growth of crops.