Microfibrils cellulosic

The filaments of all plant fibers consist of several cells. These cells form crystalline microfibrils (cellulose), which are connected together into a complete layer by amorphous lignin and hemi-cellulose. Multiple layers stick together to form multiple layer composites, filaments. A single cell is subdivided into several concentric layers, one primary and three secondary layers. Figure 5 shows a jute cell. The cell walls differ in their composition and in the orientation of the cellulose microfibrils whereby the characteristic values change from one natural fiber to another. [Pg.793]

H. Lbnnberg, L. Fogelstrbm, M. A. S. Azizi Samir, L. Berglund, E. Malmstrom, and A. Hult, Surface grafting of microfibrillated cellulose with poly( -caprolac-tone). Synthesis and characterization, Eur. Polym. J., 44 (2008) 2991-2997. [Pg.116]

Ninan N., Muthiah M., Park I.-K., Elain A., Thomas S., Grohens Y. (2013). Pectin/carbox5miethyl cellulose/microfibrillated cellulose composite scaffolds for tissue engineering. 877-885. [Pg.470]

An attempt to use a recently patented concept (Dispersed Nano-Objects Protective Encapsulation—DOPE process) intended to disperse carbon nanotubes in polymeric matrices was reported. Physically cross-linked alginate capsules were successfully formed in the presence of either cellulose whiskers or microfibrillated cellulose [153]. The resulting capsules were extruded with a thermoplastic material. Another possible processing technique of nanocomposites using cellu-losic nanoparticles in the dry state present in the filtration of the aqueous suspension to obtain a film or dried mat of particles followed by immersion in a... [Pg.90]

In contrast to CNW, microfibrillated cellulose (MFC) was able to improve the mechanical performance of GGM-based films [76]. Two levels of added MFC... [Pg.330]

The nanofibrillated (microfibrillated) cellulose was first developed by Herrick et al. (1983) and Turbak et al. (1983) via grinding of diluted pulp suspensions in high-pressure mills. Currently, a preliminary mild chemical modification is performed before mechanical disintegration in order to minimize energy consumption. The NFC is composed of nanofibriUar bundles with a lateral size of several tens of nanometers and length of a few microns. [Pg.244]

Several terms are used to denote the nanocellulose obtained by a technique of high-pressure (high-shear) mechanical disintegration of cellulose pulp, namely microfibrillated cellulose, nanofibrillated cellulose, nanofibers, etc. Here we use predominantly the term nanofibrillated cellulose. ... [Pg.262]

Lavoine, N., Desloges, I., Dufresne, A., Bras, J., 2012. Microfibrillated cellulose—its barrier properties and applications in cellulosic materials a review. Carbohydr. Polym. 90, 735-764. [Pg.285]

Tanpichai, S., Quero, F., Nogi, M., Yano, H., Young, R.J., Lindstrom, T., et al., 2012. Effective Young s modulus of bacterial and microfibrillated cellulose fibrils in fibrous networks. Biomacromolecules 13 (5), 1340—1349. [Pg.287]

Turbak, A.F., Snyder, F.W., Sandberg, K.R., 1983. Microfibrillated cellulose, a new cellulose produd properties, uses, and commercial potential. J. Appl. Polym. Sci. Appl. Polym. Symp. 37, 815-827. [Pg.287]

Xhanari, K., Syverud, K., Stenius, P., 2011. Emulsions stabilized by microfibrillated cellulose the effect of hydrophobization, concentration and o/w ratio. J. Dispersion Sci. Technol. 32 (3), 447-452. [Pg.288]

Herrick, F.W. Casebier, R.L. Hamilton, J.K Sandberg, K.R. (1983). Microfibrillated cellulose morphology and accessibility. Journal of Applied Polymer Science, Vol. 37, pp. 797-813, ISSN 1097-4628... [Pg.343]

Both native and regenerated cellulose can be used for the preparation of cellulose aerogels. Cellulose in native form, generally nanofibrillar such as bacterial cellulose and microfibrillated cellulose, has been proposed for the preparation of aerocellulose [77, 266]. Aerogels based on NFC can offer advantages from an environmental point of view, because NFC is obtained from renewable resources and no harmful solvents are required during the processing. [Pg.235]

Turbak AF, Synder FW, Sandberg KR (1982) Microfibrillated cellulose. US Patent US4483743, 20 Nov 1984... [Pg.240]

Aulin C, Gallstedt M, Lindstrom T (2010) Oxygen and oil barrier properties of microfibrillated cellulose films and coatings. Cellulose 17 559-574... [Pg.241]

There are four types of nanocellulose depending on their fabrication method bacterial cellulose, electrospun cellulose, microfibrillated cellulose (MFC) and whiskers of cellulose (nanorods). Bacterial cellulose is a nanomaterial derived from plant material by bacterial action in the presence of oxygen. Various strains of Acetobacter species [82,83] can be used to produce cellulose, although strains of pseudomonas, Achrobacter, Alcaligene, Aerobacter and Azotobacter [84] can also be used. The bacterial cellulose... [Pg.530]

Figure 14.7 Extraction of cellulose whiskers and microfibrillated cellulose from the date palm tree.

Suryanegara L, Nakagaito AN, Yano H et al (2009) The effect of crystallization of PLA on the thermal and mechanical properties of microfibrillated cellulose-reinforced PLA composites. Compos Sci Technol 69 1187-1192... [Pg.39]

Zuluaga R, Putaux JL, Restrepo A, Mondragon I, Gan a n P et al (2007) Cellulose microfibrils from banana farming residues isolation and characterization. Cellulose 14 585-592 Stro I, David P (2010) Microfibrillated cellulose and new nanocomposite materials a review. Cellulose. doi 10.1007/sl0570-010-9405-y... [Pg.41]

Henriksson M, Henriksson G, Berglund LA, Lindstro m T et al (2007) An environmentally friendly method for enzyme assisted preparation of microfibrillated cellulose (MFC) nanofibres. Eur Polym J 43 3434—3441... [Pg.41]

Nakagaito AN, Yano H (2004) Novel high-strength biocinnposites based on microfibrillated cellulose having nano-order-unit web-like network stnuHure. Appl Phys A 80 155-159... [Pg.42]

This chapter discusses the potential and use of microfibrillated cellulose (MFC) and nanofibriUated cellulose (NFC) in papermaking. Cellulosic fibrils have many potential applications due to their structure. [Pg.122]

If microfibrillated cellulose is used instead of complete fibres, the specific surface area increases dramatically. This is expected to compensate for the loss in interfibre bonding caused by mineral fillers. Thus, higher proportions of filler in paper are enabled. High filler content has a major effect toward lowering the raw materials costs in papermaking and also opens potential to develop novel engineered paper grades. [Pg.122]

In Transactions of the 2001 Fundamental Research Symposium, BPBMA, Oxford, pp 897-926 Matsuda Y, Hirose M, Ueno K (2001) Super microfibrillated cellulose, process for producing the same and coated paper and tinted paper using the same. U.S. Pat. 6,214,163 Bl, Tokushu Paper Mfg. Co. Ltd, 18 pp... [Pg.151]

Different descriptors have been used in the literature to designate the crystalline rod-like nanoparticles. These particles are mainly referred to as whiskers, nanowhiskers, cellulose nanocrystals, NCC (nanocrystalline cellulose), monocrystals, microcrystals, or microcrystallites, despite their nanoscale dimensions. The terms microfibrils, microfibrillated cellulose (MFC), and nanofibrillated cellulose (NFC) are used to designate cellulosic nanoparticles obtained by a simple mechanical shearing disintegration process (Fig. 7.2) as described in the next section. [Pg.183]

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