scholarly journals Charged ultrafiltration membranes based on TEMPO-oxidized cellulose nanofibrils/poly(vinyl alcohol) antifouling coating

RSC Advances ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 6859-6868
Author(s):  
Andrea Aguilar-Sanchez ◽  
Blanca Jalvo ◽  
Andreas Mautner ◽  
Ville Rissanen ◽  
Katri S. Kontturi ◽  
...  
Keyword(s):  
Polyvinyl Alcohol ◽  
Vinyl Alcohol ◽  
Cellulose Nanofibrils ◽  
Cellulose Nanofiber ◽  
Poly Vinyl Alcohol ◽  
Oxidized Cellulose ◽  
Ultrafiltration Membranes ◽  
Antifouling Coating ◽  
Charged Ultrafiltration Membranes

Crosslinked cellulose nanofiber-polyvinyl alcohol antifouling membrane.

Fiber Orientation Control by Stretching in Cellulose Nanofiber Green Composites

2017 ◽  
Vol 754 ◽  
pp. 135-138
Author(s):  
Hitoshi Takagi ◽  
Antonio Norio Nakagaito ◽  
Yuya Sakaguchi
Keyword(s):  
Fiber Orientation ◽  
Vinyl Alcohol ◽  
Glass Fibers ◽  
Cellulose Nanofibers ◽  
Polymeric Composite ◽  
High Strength ◽  
Sample Surface ◽  
Cellulose Nanofiber ◽  
Poly Vinyl Alcohol ◽  
Nanofiber Alignment

The presence of nanoscale cellulosic fiber; namely cellulose nanofiber, increases year by year because the mechanical and physical properties are believed to be comparable to those of common glass fibers. On the other hand, most of the reported strength data for the cellulose nanofiber-reinforced polymeric composite materials was not as high as expected. In order to obtain high-strength cellulose nanofiber-reinforced polymer composites, we tried to optimize the fiber orientation of cellulose nanofibers in poly (vinyl alcohol)-based polymer matrix by using a repeated mechanical stretching treatment. The fiber orientation of cellulose nanofibers in the poly (vinyl alcohol) matrix can be modified by changing the total amount of stretching strain applied during the multiple stretching treatments. The degree of fiber alignment was directly evaluated by observing the cellulose nanofibers on the sample surface with a digital microscope. The efficacy of proposed nanofiber alignment control has been explored experimentally and theoretically. The tensile strength and modulus of the cellulosic nanocomposites after applying the multiple stretching treatments increased by approximately 80% and 40% respectively, as compared with those of the untreated nanocomposites.

scholarly journals Photoselection of Luminescent Molecules in Anisotropic Media in the Case of Two-Photon Excitation. Part II. Experimental Studies of Hoechst 33342 in Stretched Polyvinyl alcohol) Films

1996 ◽  
Vol 51 (9) ◽  
pp. 1037-1041 ◽  
Author(s):  
A. Kawski ◽  
Z. Gryczyński ◽  
I. Gryczyński ◽  
J. R. Lakowicz ◽  
G. Piszczek
Keyword(s):  
Polyvinyl Alcohol ◽  
Vinyl Alcohol ◽  
Experimental Studies ◽  
Poly Vinyl Alcohol ◽  
Hoechst 33342 ◽  
Emission Anisotropy ◽  
Two Photon ◽  
Photon Excitation ◽  
Polyvinyl Alcohol Films ◽  
Two Photon Excitation

Abstract It was found by investigating dichroism and emission anisotropy in the case of one-and two-photon excitation of Hoechst 33342 [bis-benzimide,2,5'-bi-1H-benzimidazole, 2'-(4-ethoxyphenyl)-5-5(4-methyl-1-piperazinyl)] in stretched poly(vinyl alcohol) (PVA) films, that the absorption and fluorescence transition moments lie along the long molecular axis of the molecule studied. The slight deviation of the transition moment direction in fluorescence (about 8°) from that in absorption can be due to the incomplete linearity of the Hoechst molecule.

Electrospun Nanofibers of Poly(vinyl alcohol) Reinforced with Cellulose Nanofibrils

2008 ◽  
Vol 2 (3) ◽  
pp. 231-242 ◽  
Author(s):  
Eliton S. Medeiros ◽  
Luiz H. C. Mattoso ◽  
Edson N. Ito ◽  
Kay S. Gregorski ◽  
George H. Robertson ◽  
...  
Keyword(s):  
Vinyl Alcohol ◽  
Cellulose Nanofibrils ◽  
Electrospun Nanofibers ◽  
Poly Vinyl Alcohol

Substituent Effects on the Luminescence of 2-Substituted 3-Methylquinoxalines in Poly (Vinyl Alcohol) Films*

1991 ◽  
Vol 46 (4) ◽  
pp. 304-306 ◽  
Author(s):  
Z. Gryczyński ◽  
A. Kawski
Keyword(s):  
Polyvinyl Alcohol ◽  
Temperature Dependence ◽  
Vinyl Alcohol ◽  
Substituent Effects ◽  
Quantum Yields ◽  
Poly Vinyl Alcohol ◽  
Band Position ◽  
Fluorescence And Phosphorescence ◽  
Polyvinyl Alcohol Films

Abstract The effect of 2-substitutions (NH2 . O, CH3O, CI. Br) in 3-methylquinoxalines on the fluorescence and phosphorescence band position and intensity at 293 K, and the temperature dependence of their fluorescence and phosphorescence quantum yields were investigated in polyvinyl alcohol) films

Fabrication of Poly(vinyl alcohol)/Cellulose Nanofiber Derivative from Kenaf Bast Fiber via Electrospinning

2016 ◽  
Vol 8 (2) ◽  
pp. 168-172 ◽  
Author(s):  
Hoik Lee ◽  
Kyung Hun Song ◽  
Seung Soon Im ◽  
Jong-Sun Jung ◽  
Abdul Wahab Jatoi ◽  
...  
Keyword(s):  
Vinyl Alcohol ◽  
Cellulose Nanofiber ◽  
Poly Vinyl Alcohol ◽  
Bast Fiber ◽  
Kenaf Bast ◽  
Kenaf Bast Fiber
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