臺灣博碩士論文加值系統

由於高阻值導電油墨在加濕時有阻值變化率較大之問題，因此先量測各種碳黑之吸水率，藉以瞭解碳黑對水氣之吸收率，再將碳黑配製成導電油墨並加熱固化後之碳膜吸水率，量測碳膜隨時間水氣之吸收量，以及量測同一種碳黑調配成低阻值及高阻值時之阻值變化率，以及高、低阻值之阻值變化率間之差異。最後選擇熱裂解碳黑與酸化處理過之碳黑製備高阻值導電油墨，比較何種碳黑之阻值變化率較低，藉瞭解原料特性來選擇適當的碳黑，藉以降低高阻值導電油墨在高濕度下之阻值變化率。

As carbon paste of high resistivity exhibits considerably larger fractional increase of initial resistance upon exposure to high humidity for prolonged period of time, it is the objectives of this study to first investigate the percentage increase in water uptake of a variety of carbon blacks, the fractional change in initial resistivity and the moisture uptake of cured carbon films. This was followed by incorporating carbon blacks into making carbon pastes of low and high resistivity. Thermal blacks and acidic or oxidized carbon blacks were selected to make carbon paste of high resistivity. A comparison was made to figure out which carbon black has the lowest fractional change in initial resistivity. This study showed the importance of proper selection of carbon blacks is essential to lower the fractional change in initial resistivity of curd film upon exposure to high humidity environment.

Chinese Abstract I
English Abstract II
Table of Contents IV
List of Tables VI
List of Figures VIII
List of Symbols XIII
Chapter 1 1
Introduction 1
Chapter 2 Literature Review 2
2.0 Basic Properties and Applications of Carbon black 2
2.1 Conductivity of Carbon Black 4
2.2 Dispersion of Carbon Paste 10
2.3 Volatile Contents of Carbon Blacks 12
2.4 Hydrophilic and Hydrophobic Properties of Carbon Black14
2.5 Reinforcement of Carbon Black 17
2.6 Thermal Black 17
2.7 Modified Carbon Black 22
2.8 Oxidized Carbon Black 24
2.9 Humidity Effect of Carbon Black 28
2.10 Phenolic Resin 36
2.10.1 Curing of the Novolacs 38
2.10.2 Curing of the Resoles 39
Chapter 3 Experimental 41
3.0 Materials 41
3.1.1 Sample Preparation 41
3.1.2 Carbon Paste Preparation 43
3.1.3 Carbon Paste Preparation after Three Roll Mining 46
3.1.3 pH Measurement 47
3.2 Instrumentation 47
Chapter 4 Results and Discussion 49
4.0 Introduction 49
4.1 Effect of Carbon Black Properties on Moisture Adsorption 49
4.2 Fractional Change in Carbon Film Resistivity for Prolonged High Humidity Exposure 53
4.3 Fractional Change in Initial Resistance of Various Carbon Blacks 63
Chapter 5 CONCLUSIONS 65

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