教師資料查詢 | 類別: 期刊論文 | 教師: 賴偉淇 Lai,Wei-chi (瀏覽個人網頁)

標題:Tuning the self-assembled 1,3:2,4-di(3,4-dimethylbenzylidene) sorbitol nanoarchitectures using the phase inversion method
學年102
學期1
出版(發表)日期2013/10/01
作品名稱Tuning the self-assembled 1,3:2,4-di(3,4-dimethylbenzylidene) sorbitol nanoarchitectures using the phase inversion method
作品名稱(其他語言)
著者Lai, Wei-Chi; Tseng, Shen-Jhen
單位淡江大學化學工程與材料工程學系
出版者Dordrecht: Springer Netherlands
著錄名稱、卷期、頁數Journal of Nanoparticle Research 15(11), 2060(10pages)
摘要1,3:2,4-Di(3,4-dimethylbenzylidene) sorbitol (DMDBS) molecules can self-assemble into nanoscaled structures in organic solvents and polymer melts. The nanofibril structures were the mostly found. In this study, we used two phase inversion methods, i.e., dry and wet methods, to obtain different DMDBS nanoarchitectures. Poly(vinylidene fluoride) (PVDF) was chosen as polymer matrix, and the DMDBS structures were tuned by the process of PVDF membrane formation (crystallization and liquid–liquid demixing). When the membrane was prepared using the dry method, the DMDBS structure is controlled by the PVDF crystallization. Fewer DMDBS nanofibrils formed on the surfaces, and no nanofibrils were found in the cross-sections. On the other hand, when the membrane was prepared using the wet method, the liquid–liquid demixing (nonsolvent induced phase separation) occurred simultaneously as PVDF crystallized, and thus influenced the aggregation of DMDBS molecules. DMDBS is an amphiphilic molecule with two hydrophilic hydroxyl groups. The addition of nonsolvent (water) caused a large number of DMDBS molecules to aggregate outside the hydrophobic PVDF. In addition, a new structure “nanomat” was found. The mat was composed of DMDBS nanofibrils with diameters of 10–20 nm, similar to those observed in the dry method membranes. Fourier transform infra-red spectroscopy indicates that the DMDBS molecules self-assembled (aggregated) mainly through intermolecular hydrogen bonding in the presence of PVDF. The more intermolecular hydrogen bonding between DMDBS existed, the more excessive amounts of DMDBS molecules were, leading to the formation of nanomats.
關鍵字Poly(vinylidene fluoride); Crystallization; Liquid–liquid demixing; Nanofibrils; Nanomats; Nanostructured membrane
語言英文
ISSN1388-0764;1572-896X
期刊性質國外
收錄於SCI
產學合作
通訊作者Lai, Wei-Chi
審稿制度
國別荷蘭
公開徵稿
出版型式紙本;電子版
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