有序性之奈米複合纖維材料：合成與特性研究

Preparation of orientation Co-Al LDHs nanofiber: synthesis and characterization

張博學(Po-hsueh Chang) ； 張樹峰(Shu-feng Zhang) ； 賴傳威(Chuan-wei Lai) ； 陳邦旭(Pang-Shiu Chen) ； 彭政雄(Cheng-Hsiung Peng)

《明新學報》 44卷2期 (2021/12) Pp. 18-43

摘要

本研究藉由共沉澱水熱法合成Co-Al層狀雙氫氧化合物搭配靜電紡絲技術製備具順向性之層狀雙氫氧化合物／聚乙烯醇（LDHs/PVA）奈米纖維材料。本實驗將聚乙烯醇（Polyvinyl Alcohol, PVA）與Co-Al層狀雙氫氧化合物（Co-Al Layered Double Hydroxids, LDHs）均勻混合成溶液中，藉由自製雙電極鋁片，利用其電場控制紡絲纖維的收集具有定向排列。主要探討無序排列性與有序排列性纖維對於形貌與分布於纖維表面Co-Al LDHs之結構與特性。實驗中利用硝酸鈷Co(NO_3)_2)與硝酸鋁（Al（NO_3）_3）生成Co-Al LDHs粉末，再將其分別以4 wt%、8 wt%、16 wt%摻入PVA 10 wt%高分子溶液並充分攪拌，配置完成前驅物，並進行靜電紡絲。實驗藉由X光繞射儀（XRD）檢測晶體結構、掃描式電子顯微鏡（SEM）觀測纖維排列趨勢及成長於纖維上LDHs表面形貌，熱重分析儀（TGA）檢測樣品之熱穩定性、最後利用傅里葉轉換紅外光譜（FTIR）檢測樣品於不同含量混摻前後其性質之改變。研究中經由SEM的觀察發現摻入PVA之Co-Al LDHs 16 wt%，以靜電紡絲後所呈現定向性串珠狀纖維結構；由此現象研判Co-Al LDHs均勻分散於高分子溶液中透過紡絲技術使團聚之Co-Al LDHs可均勻的分佈於纖維中藉此大幅提升Co-Al LDHs比表面積，未來可充分運用此特性應用於相關之氣敏材料，藉此改善氣體感測器用於工廠設備之安全監控、危害環境之環境檢測、室內外空氣品質、電子醫療照顧等等，並探討其發展之可行性及潛力。

關鍵字

聚乙烯醇 ； 靜電紡絲 ； 層狀雙氫氧化合物 ； 有序排列性

並列摘要

This study prepared a layered double hydroxide/polyvinyl alcohol (LDHs/PVA) nanofiber material with a forward orientation by coprecipitation hydrothermal synthesis of Co-Al layered double hydroxide and electrospinning technique. In this experiment, (Polyvinyl Alcohol, PVA) and (Ca-Al Layered Double Hydroxids, LDHs) were uniformly mixed into a solution, and self-made two-electrode aluminum sheets controlled the electric field. The collection of spun fibers has an oriented arrangement. This paper mainly discusses the structure and characteristics of disordered and ordered fibers on the morphology and distribution of Co-Al LDHs on the fiber surface. In the experiment, Co-Al LDHs powder was formed by using cobalt nitrate Co(NO_3)_2) and aluminum nitrate (Al(NO_3)_3), and then blended into PVA 10 wt% with 4 wt%、 8 wt%、 16 wt%, respectively. The molecular solution was thoroughly stirred, the precursor was configured, and electrospinning was performed. The experiment was carried out by X-ray diffraction (XRD) to detect the crystal structure, scanning electron microscope (SEM) to observe the fiber alignment trend and the surface morphology of the LDHs grown on the fiber. The thermogravimetric analyzer (TGA) was used to detect the thermal stability of the sample. Finally, Fourier transform infrared spectroscopy (FTIR) was used to detect the change of the properties of the samples before and after mixing. However, SEM observed that 16 wt% of Co-Al LDHs doped with PVA exhibited a directional beaded fiber structure after electrospinning. From this phenomenon, Co-Al LDHs were uniformly dispersed in a polymer solution. The Co-Al LDHs agglomerated by the spinning technique can be uniformly distributed in the fibers to increase the specific surface area of Co-Al LDHs significantly. This property can be fully utilized in the future. It is applied to related gas-sensitive materials to improve the safety monitoring of gas sensors for industrial equipment, environmental testing for environmental hazards, indoor and outdoor air quality, electronic medical care, etc., and to explore the feasibility and potential of its development.

並列關鍵字

Polyvinyl Alcohol ； Electrospinning ； Layered Double Hydroxide ； Orderly alignment

參考文獻

G. Taylor(1964), “Disintegration of Water Drops in an Electric Field.” Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences, Vol. 280, Pages 383-397.

J. R. Melcher and G. Taylor(1969), “Electro hydrodynamics: A Review of the Role of Interfacial Shear Stresses.” Annual Review of Fluid Mechanics. Vol. 1, Pages 111.

張峰瑋(2010)，靜電紡絲纖維排列均齊性之研究中，國文化大學，材料科學與奈米科技研究所，碩士論文。

鄧吉雄(2004)，微電灑晶片之發展與研究，國立成功大學，微機電系統工程研究所，碩士論文。

黃宣諭(2009)，以電氣紡絲法製備具方向性纖維支管狀結構，國立交通大學，機械工程學系所，碩士論文。