Pant H R, Bajgai M P, Yi C, et al. Effect of successive electrospinning and the strength of hydrogen bond on the morphology of electrospun nylon-6 nanofibers [J]. Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2010, 370(1): 87-94.
摘要的層次
- We demonstrate for the first time herein that the successive electrospinning can change the fiber morphology in the electrospun mat of the polymer at the same electrospinning parameters.
做了什么：第一次說明了相同參數(shù)下連續(xù)紡絲對形貌影響 - Two types offibers (nano and sub-nano size) arranged in a spider-net like structure were obtained from the singlepolymer nylon-6 by electrospinning.
實驗內(nèi)容 - FE-SEM images of the mats at different applied voltage showed thatthis network consisted of thin nanofibers with diameters of about 8–29nm and thick nanofibers withdiameters of about 80–292nm, arranged in a spider-net like structure. **The successive electrospinning sufficiently decreased the diameter of the main nanofibers and hardly change the diameter of the thinnerfibers. **
最突出的結(jié)果 - The study of FT-IR spectra and the conductivity of the different mats in acidic solution showed thatthe formations of spider-net structure were due to the formation of stronger hydrogen bonds betweenionized oligomer/monomer and polymer molecules.
解釋下氫鍵形成機理 - The possible mechanism of hydrogen bonds formation during electrospinning was proposed. These spider-net structures with high aspect ratio wereresponsible to increase the mechanical strength of nylon-6 mat.
結(jié)論：氫鍵碴萧，&用途
簡介部份
- 說明電壓影響，此外連續(xù)紡絲影響
- 沒人解釋氫鍵機理，我來解釋
實驗部分
濃度：22 wt%桥狡，距離：18 cm翅溺，電壓：12吐葱，22耐量，32kv盒延，m12缩擂，m22，m32. m12溶解了為sm1添寺，再溶解紡絲胯盯，sm2
結(jié)果和討論
- 電壓是關(guān)鍵哪，親
12 kv下沒有计露，且纖維不光滑博脑。增加電壓就有了憎乙。 - 作為支撐上面結(jié)論，用電導(dǎo)率變化來說明
高電壓叉趣，聚合物電離更多泞边。 - 但好像電壓太高也不對
32 kv反而減少了nano-web，且松散連接在主纖維君账。而且主纖維變扁了繁堡。 - 多次紡絲后纖維直徑下降
The average fiber diameter of m22, sm1 and sm2 mat were found to be 228, 102 and 52 nm, respectively. - 紫外實物圖
低聚/單體產(chǎn)生沈善，溶液變成棕色乡数。分子量下降對應(yīng)纖維變細(xì)。 - 氫鍵&結(jié)晶改變
- amide II at 1545 cm?1隨著電壓升高移動闻牡，說明有氫鍵净赴，m22氫鍵最強。
- ? γ 相 of m22 mat 709 移動為 sm1的690 α 相罩润。連續(xù)紡絲后α相
- 21.4? which represents the ?γ phase, 16.6?( ?α phase)
- TGA 不同晶型不同Tg玖翅。
結(jié)論
- The goal of this investigation has been to build a basis to study
more complicated structures in sub-nanoscale of biocompatible
polymers in order to better understand the effect of the electrospinning process on fiber morphology.
本文主要目的了解連續(xù)紡絲對形貌影響 - Other polymers whichare polyelectrolytic in nature may also form spider-net like structure.
提到其他也可以，普適割以。 - Furthermore, we except that the polymers used in biomedical application on functionalization by the atoms/group of atoms capable to form hydrogen bond, may also be able to give spider-netlike structures which may be potential in bioengineering field likeas drug and gene delivery.
- In this work, the obtained nanofibersmat of nylon-6 as the function of applied voltage has to be foundmore surface to volume ratio with higher mechanical strength.
重復(fù)了一次電壓很重要的 - In this work, the obtained nanofibersmat of nylon-6 as the function of applied voltage has to be foundmore surface to volume ratio with higher mechanical strength.
連續(xù)紡絲金度，打開了新世界大門。
