明膠／水／甘油／戊二醛系統的電氣及機械性質研究

本研究主要是以「明膠」來做為此研究之基底，進行模擬人體組織假體製造。明膠具良好的凝膠性質，並添加甘油做為可塑劑，增加明膠成形時的韌性與塑形能力，另外加入戊二醛做為交連劑，使用動態機械儀、示差掃描熱分析儀與動態介電儀做測試與分析，藉以了解不同比例明膠，與不同比例之甘油混和後的機械性質、熔化峰溫度、介電常數與導電度，並對於加入交連劑後的明膠薄片同樣進行上述這些測試。據實驗結果顯示，明膠與甘油混合的系統中，在機械性質上顯示出明膠與甘油的比例逐漸上升，儲存模數(Storage Modulus)都有逐漸上升的情況；從熔化峰溫度中可以看出明膠的含量越多，或者是甘油的含量越高，都可以使熔化峰的溫度上升，另外添加交連劑的系統中，則表現出明膠膠體由物理交連轉變為化學交連；最後在動態介電儀的部分，可以看出添加的明膠與甘油越多，可使介電常數與導電度有所降低，但對於添加交連劑後並沒有顯著的影響。整體分析後，在明膠溶液中加入甘油的系統中，可以使其物理性質與機械性質上有所提升，顯示出甘油具有良好的增塑性、保水性。使用交連劑後，改變交連的性質，亦可增加其耐熱性以及強度。

關鍵字

明膠；甘油；戊二醛

並列摘要

Gelatin was used as the main component in this research for developing artificial tissue emulating (ATE) materials. Gelatin has superior gelling properties in water. By combining with glycerol, the gelatin/water/glycerol mixtures possess higher toughness and better processability. Glutaraldehyde was also added as a crosslinking agent. Experimental tools such as Dynamic Mechanical Analysis (DMA), Differential Scanning Calorimetry (DSC) and Dielectric Analysis (DEA) were employed to measure the electric, thermal and mechanical properties of the gelatin mixtures at different compositions. The DMA results showed for gelatin/water/glycerol mixtures that the storage moduli increased with increasing concentration of gelatin or glycerol. The melting temperatures also increased with increasing concentration of gelatin or glycerol. The addition of glutaraldehyde changed the gel system from being physically crosslinked to being chemically crosslinked. Lastly, the DEA results showed that the dielectric constants and the conductivities decreased with increasing gelatin or glycerol concentrations while the addition of glutaraldehyde had little effect on the electric properties. The addition of glycerol enhances the mechanical properties and water-retaining capability of the mixtures. The addition of glutaraldehyde changes the crosslinking behaviors and enhances the temperature resistance and mechanical properties of the mixtures.

並列關鍵字

Gelatin ； Glycerol ； Glutaraldehyde

參考文獻

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明膠／水／甘油／戊二醛系統的電氣及機械性質研究

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