臺灣博碩士論文加值系統

本研究分為兩部份，第一部份利用乙烯乙烯醇共聚合體，根據以發表之薄膜成膜機構為基礎探討二次相轉接的成膜理論。
由乙烯乙烯醇共聚合體兩階段成膜實驗的結果顯示，在成膜的過程中的確有發生第二次相轉換的可能。但是如果第一次相轉換是由結晶所控制，則不可能發生第二次相轉換。若第一次相轉換是由液-液相分離所主導，則相分離後所產生的高分子富有相仍有可能發生第二次相轉換。
將水-異丙醇-乙烯乙烯醇共聚合體共溶劑相圖的實驗觀察結果和Flory-Huggins Theory的計算結果相對照，可以證明對於共溶劑系統而言，三成分間作用力參數XT是不可忽略的，當XT為負值時表示有共溶效應的產生，所以XT的大小也可以用來衡量三成分間作用力的強弱。
研究的第二部份是將不同表面形態的乙烯乙烯醇共聚合體薄膜應用於老鼠小腦神經細胞的培養，結果顯示材料本身的材質相當適合神經細胞的生長，而其中顆粒膜＞孔洞膜＞緻密膜，證實薄膜的表面形態的確對於神經細胞的貼附和生長有相當的影響。

Part I.
The results of two-step coagulation procedure of ethylene vinyl alcohol copolymer(EVAL) show that the second phase inversion would occur during the formation of membrane. The second phase inversion only occurs when the first phase inversion is resulted from liquid-liquid demixing. If the particle nuclei are formed in the first bath, there is no chance to proceed the second phase inversion.
According to the experiment data and the result of phase diagram of Water-IPA-EVAL system calculated by Flroy-Huggins Theory, we can assure that the ternary interaction term(XT) cannot be neglected in a cosolvent system. The XT is negative when the system shows some cosolvent behaviors. We can also use this way to determine the magnitude of interaction reaction among three components .
Part II.
In the study of neuron tissue culture, EVAL membranes with three different morphology show better results than the control group, The particulate membrane shows the best result. The porous membrane is the second and the dense membrane is the third. The surface morphology of membrane has influence on the growth of neuron cells.