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Saturday, July 18, 2020 | History

2 edition of behaviour of bast fibres under the influence of caustic alkalies found in the catalog.

behaviour of bast fibres under the influence of caustic alkalies

Linen Industry Research Association.

behaviour of bast fibres under the influence of caustic alkalies

by Linen Industry Research Association.

  • 103 Want to read
  • 26 Currently reading

Published in (Lambeg? .
Written in English


Edition Notes

From the Journal of the Textile Institute, XIV: 6, 1923.

StatementBy C.R. Nodder and R.W. Kinkead.
SeriesResearch Institute Memoirs -- 14
ContributionsNodder, C. R., Kinkead, Robert W., Textile Institute.
The Physical Object
Pagination24 p., 2 plates :
Number of Pages24
ID Numbers
Open LibraryOL20093520M

An illustration of an open book. Books. An illustration of two cells of a film strip. Video. An illustration of an audio speaker. Audio. An illustration of a " floppy disk. Software. An illustration of two photographs. Images. An illustration of a heart shape Donate. An illustration of text ellipses.   FIBRES (or Fibers, in American spelling; from Lat. fibra, apparently connected either with filum, thread, or findere, to split), the general term for certain structural components of animal and vegetable tissue utilized in manufactures, and in respect of such uses, divided for the sake of classification into textile, paper-making, brush and.

Krishna et al.() studied the flexural and shear behaviour of polypropylene fibre reinforced fly ash concrete (PFRFAC) deep beams. The variables of study included the characteristic strength of concrete, f ck (15 MPa, 20 MPa, and 25 MPa) and polypropylene fibre content (0%, % and 1%). Leaf fibres (sisal, abaca (banana), palm) In general the leaf fibres are coarser than the bast fibres. Applications are ropes, and coarse textiles. Within the total production of leaf fibres, sisal is the most important. It is obtained from the agave plant. The stiffness .

  Alkaline treatment is one of the most widely used chemical treatments for natural fibres for use in natural fibre composites. The effect of alkaline treatment on natural fibres is it disrupts the incidence of hydrogen bonding in the network structure, giving rise to additional sites for mechanical interlocking, hence promoting surface roughness. the alkali swelling affected the swelling behavior of kraft pulps, but there was no distinct influence on the crystalline structure. The beating treatment before alkali swelling improved the alkali swelling of fiber. However, beating after the alkali treatment diminished the alkali swelling effects.


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Behaviour of bast fibres under the influence of caustic alkalies by Linen Industry Research Association. Download PDF EPUB FB2

Bast and Other Plant Fibres, a title in Woodhead Publishing’s series on fibres published in association with The Textile Institute, UK, is the first book in over 50 years to cover the most interesting plant fibres and those with high annual production.

21ème Congrès Français de Mécanique Bordeaux, 26 au 30 août 1 Study the effect of alkali treatment of natural fibers on the mechanical behavior of the composite unsaturated Polyester-fiber Alfa A.

BENYAHIA a, A. MERROUCHE, M. ROKBIb,c, Z. KOUADRIa a. Bast fibre (also called phloem fibre or skin fibre) is plant fibre collected from the phloem (the "inner bark", sometimes called "skin") or bast surrounding the stem of certain dicotyledonous supports the conductive cells of the phloem and provides strength to the stem.

Some of the economically important bast fibres are obtained from herbs cultivated in agriculture, as for instance. highest time of exposure.

Fiber surface pitting and roughness increase, which reduced mechanical properties, could be seen in aged specimens. Another paper [8] analyzes rods behaviour in alkaline solution: the reduction of both tensile and bond strength (measured by pull-out tests) was higher when long exposure time and high temperature were used.

and dried at 70ºC for 24 h under vacuum. The major fibres constituents (α-cellulose, hemicellulose and lignin) of the untreated and alkaline-treated jute fibre samples were determined by chemical analysis following standard procedures.

The results are listed in Table 1. Table 1. Jute chemical composition Component (%) Treated Untreated. Ramie fibre is a bast fibre obtained from the inner bark of the ramie stem 3. The total lifespan of the crop ranges from years 4.

Generally it grows up to a height of m, the leaves are heart-shaped, cm long and cm broad and white on the underside with dense small hairs. Bast fibre bundles are often several feet long and composed of overlapping cellulose fibres and a cohesive gum, or pectin, which strengthens the stem of the plant.

The actual fibres are located between the epidermis, or bark surface, and an inner woody core. During harvesting, the plant stalks are cut off close to the base or pulled up. Bast fibre, soft, woody fibre obtained from stems of dicotyledonous plants (flowering plants with net-veined leaves) and used for textiles and cordage.

Such fibres, usually characterized by fineness and flexibility, are also known as “soft” fibres, distinguishing them from the coarser, less flexible fibres of the leaf, or “hard,” fibre group.

As nouns the difference between alkaline and caustic is that alkaline is an alkaline battery while caustic is any substance or means which, applied to animal or other organic tissue, burns, corrodes, or destroys it by chemical action; an escharotic.

As adjectives the difference between alkaline and caustic is that alkaline is of, or relating to an alkali, one of a class of caustic bases while.

Alkaline means "having a pH between and 14". Caustic means harsh, corrosive in some way. Both strong acids and strong bases are caustic. Bast fibres such as linen, which is the most costly and luxurious within this category, are valued for their exceptional coolness and freshness in hot weather.

It is such a desirable commodity that textiles in a linen-weave texture, even when made of nettles, hemp, jute, kenaf, bamboo and other non-flax fibers are also often loosely referred to.

There is an increasing demand for natural fibres worldwide due to their renewable and biodegradable nature. This paper reviews many aspects of natural fibres, focusing on the bast fibres of plants including hemp, flax, kenaf, jute, and ramie. Bast fiber material mostly free of wooden shives and dried even under caustic and/or oxida tive The main focus of this paper is the influence of processing parameters in enzymatic hemp.

The difference in effects is attributed to the alkali influence on the accessibility of crosslinker in fiber structures.

Thus under the experimental conditions studied, bound Ca(2+) is. Lucka, M, Bledzki, A K, Michalski, J ‘Influence of the hydrophobisation of Flax fibres on the water sensitivity, biological resistance and electrical properties of Flax–polypropylene composites’ In Proceedings of the 5th Global Wood and Natural Fibre Composites Symposium, Kassel, Germany, Aprilpp.

A – A Retting is the process of allowing microbes, or in the modern day – chemicals, to digest the fibers away from the stalk of the plant.

There are a number of ways that one can ret fiber plants – pond, stream, field (also called dew retting), and snow retting are the non-modern (non chemical) methods used most often.

Anish M. Varghese, Vikas Mittal, in Biodegradable and Biocompatible Polymer Composites, Hemp fibers. Hemp fibers are considered as one of the strong member of bast natural fibers family, which are derived from the hemp plant under the species of ys, these fibers have received wide acceptance as reinforcements in composite materials on account of their.

Caustic is a see also of alkali. As nouns the difference between caustic and alkali is that caustic is any substance or means which, applied to animal or other organic tissue, burns, corrodes, or destroys it by chemical action; an escharotic while alkali is (chemistry) one of a class of caustic bases, such as soda, potash, ammonia, and lithia, whose distinguishing peculiarities are solubility.

Bast Fiber Harvesting and Pretreatment. At optimum maturity, the plants are pulled or mowed by hand or machine and, if necessary, threshed to remove seeds. The plants are spread out in a field to dry. Retting. The removal of the bast fibers from bark and woody stem parts is promoted by a biological treatment called retting (rotting).

The main aim of this work was to study the effect of sisal fiber surface treatments on water uptake behavior of composites based on untreated and treated fibers.

For this purpose, sisal fibers were treated with different chemical treatments. All surface treatments delayed the water absorption of fibers only for a short time of period.

No significant differences were observed in water uptake. The fiber is around the outside of the plant and comprises one-third of the weight. The center (core) resembles balsa wood and has many uses, including animal bedding and oil absorbants.

In India and Bangladesh, it is mostly used as firewood. Unlike synthetic fibers, bast fibers are made up. In view of investigating the influence of the alkaline solutions on fibres, it is remarkable to note that the effect of using glass fibre is quite significant in comparison.

From figure 6 it can be seen that when the glass fibre is boiled for a long period (24 hours) there is a big decrease in the fibre .This paper highlights the physical and chemical surface modifications of plant fibre (PF) for attaining suitable properties as reinforcements in cementitious composites.

Untreated PF faces insufficient adhesion between the fibres and matrix due to high levels of moisture absorption and poor wettability.

These conditions accelerate degradation of the fibre in the composite.