Formation and Characterization of Cellulose Membranes fromN-Methylmorpholine-N-oxide Solution

Zhang, Yaopeng; Shao, Huili; Wu, Chwan-Hwa; Hu, Xuechao

doi:10.1002/1616-5195(20010601)1:4<141::aid-mabi141>3.0.co;2-j

Cited by 51 publications

(17 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…(1)7, 8 or as Permeation Flux, J as eq. (2)3: or \font\abc=cmmib10\def\bi#1{\hbox{\abc #1}} $$ {\bi J} = {{\bi V} \over {\bi {tS}}}$$ in which V is the total volume of the water permeated during the experiment (mL); t is the operation time (h); and S is the membrane area (m 2 ), and P is test pressure (mmHg).…”

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Preparation and characterization of dense cellulose film for membrane application

Ichwan

Son

2011

J of Applied Polymer Sci

View full text Add to dashboard Cite

Regenerated cellulose films were prepared with environmentally friendly process by utilized N-methylmorpholine-N-oxide (NMMO)-Cellulose system. To prepare a dense cellulose film for membrane application, some parameter process which influence porous forming such as cellulose DP, cellulose concentration, addition NMMO in coagulation bath, coagulation bath temperature, and drying condition were investigated. We resumed that the porosity and pore size of cellulose membrane decrease with lower cellulose DP, higher cellulose concentration, addition of NMMO in coagulation bath, applying room temperature in coagulation bath and drying, and applying vacuum on drying process resulted in membranes with porosity in range of 24-41% and pore size 13.4-20.2 nm. The main factor for controlling porosity and pore size of dense cellulose membrane was coagulation process condition especially addition of NMMO into coagulation bath.

show abstract

Section: Methodsmentioning

confidence: 99%

“…The wide use of cellulose membrane recently is because of their relatively low cost, good compatibility with biological compounds, and their excellent hydrophilic properties 2. Moreover utilizing cellulose as a raw material is a subtle way to save environment as well as to reduce consumption of the limited resource of our petroleum 3…”

Section: Introductionmentioning

confidence: 99%

Preparation and characterization of dense cellulose film for membrane application

Ichwan

Son

2011

J of Applied Polymer Sci

View full text Add to dashboard Cite

show abstract

“…To date, only a few solvents have been used for the dissolution of native cellulose or chitin (Table 1). These include some conventional polar solvent systems such as N-methylmorpholine oxide (NMMO), 30 lithium chloride/dimethylacetamide (LiCl/ DMAc), 31,32 paraformaldehyde/dimethylsulfoxide (PF/DMSO), triethylammonium chloride/dimethylsulfoxide (TEAC/DMSO), 33 tetrabutylammonium fluoride/dimethylsulfoxide (TBAF/ DMSO), 34 lithium chloride/N-methyl-2-pyrolidone (LiCl/NMP), 35 and calcium chloride dihydrate/methanol (CaCl 2 •2H 2 O/MeOH). 26 Although the use of these polar solvents has somewhat alleviated the issues with the biopolymer's intractability, the toxicity or corrosivity of these organic components can inhibit batch production and potential applications of the resulting gels.…”

Section: Dissolution Of Native Cellulose and Chitinmentioning

confidence: 99%

Hydrogels based on cellulose and chitin: fabrication, properties, and applications

et al. 2016

View full text Add to dashboard Cite

show abstract

“…The cellulose concentration were 9 wt% and the dope was degassed at 90 • C for 4 h before use. 4 The flat films were obtained by traditional casting method as shown in Figure 1 using the casting ma- chine made by our group. Firstly, the cellulose solution was cast into flat film form on nonwovens fabricated by polyethylene terephthalate (PET) at room temperature.…”

Section: Film Preparationmentioning

confidence: 47%

The Chain Orientation of Cellulose Flat and Tubular Films Prepared from N-Methylmorpholine N-Oxide Solutions

Zhang¹,

Shao²,

Hu³

2002

Polym J

Self Cite

View full text Add to dashboard Cite

ABSTRACT:Cellulose flat and tubular films were made from cellulose-aqueous N-methylmorpholine N-oxide solution system by casting method on nonwovens and blow-extrusion technique, respectively. An attempt was made to disclose the chain orientation of the new cellulose films. It was found that the (110) lattice planes of the flat and tubular films have an uniplanar orientation mode with respect to the film surface. For flat films, the (110) lattice planes are almost unoriented with respect to the machine direction. However, the (110) planes of tubular films have axial orientation with respect to the machine direction. With increasing blow up ratio, both the axial orientation and the crystallinity of tubular films increase. With increasing draw down ratio, only the axial orientation increases while the crystallinity does not change significantly. The three dimensional orientation parameters from polarized Fourier transform infrared spectrometry (FT-IR) spectra by sample tilting indicate that the uniplanar orientation of cellulose chain with respect to the surface of flat film increases when the casting speed increases. Moreover, no axial orientation was found within the plane parallel to the flat film surface. For tubular films, the uniplanar orientation with respect to the film surface increases with the blow up or draw down ratio.KEY Recently, N-methylmorpholine N-oxide (NMMO) as a new organic solvent has been used to dissolve cellulose to prepare novel cellulosic products with improved mechanical properties when compared to materials prepared by the conventional viscose process. 1-3 Disadvantages of the more than one century old viscose technology are its complicated multi-step processing line and the serious environmental problems arising from the use of CS 2 . However, the new NMMO process has no chemical reaction and byproducts. It is possible to prepare the cellulose films from NMMO solution using casting method as well as blow-extrusion process in our laboratory. The super-molecular structures of the two types of films must be different due to the different fabricate method. Especially for the blown films, the process of film formation includes two processes simultaneously, that are drawing-down and blowing-up processes. Furthermore, the blowing-up process is a twodimensional elongation process. Therefore, the combination of drawing-down ratio and blow-up ratio may affect the orientation or crystallization of cellulose film.It is known that X-Ray diffraction is a powerful characterization tool for the elucidation of crystalline microstructure. Nevertheless, it is inaccessible to estimate the degree of orientation in the amorphous phase, which is a very important parameter influencing material properties of polymers. Infrared spectroscopy is a complementary method since vibrational absorptions can arise from chain segments in both amorphous and crystalline phases. In the present paper, X-Ray diffraction techniques are used to reveal and characterize orientation modes in the crystalline regions of the two typ...

show abstract

Formation and Characterization of Cellulose Membranes fromN-Methylmorpholine-N-oxide Solution

Cited by 51 publications

References 8 publications

Preparation and characterization of dense cellulose film for membrane application

Preparation and characterization of dense cellulose film for membrane application

Hydrogels based on cellulose and chitin: fabrication, properties, and applications

The Chain Orientation of Cellulose Flat and Tubular Films Prepared from N-Methylmorpholine N-Oxide Solutions

Contact Info

Product

Resources

About