Characterization of trichome phenotypes to assess maturation and flower development in Cannabis sativa L. by automatic trichome gland analysis

Fiber crops are field crops grown for their fibers, which are traditionally used to make paper, cloth, or rope.[1]

Fiber crops are characterized by having a large concentration of cellulose, which is what gives them their strength. The fibers may be chemically modified, like in viscose (used to make rayon and cellophane). In recent years, materials scientists have begun exploring further use of these fibers in composite materials. Due to cellulose being the main factor of a plant fiber's strength, this is what scientists are looking to manipulate to create different types of fibers.

Fiber crops are generally harvestable after a single growing season, as distinct from trees, which are typically grown for many years before being harvested for such materials as wood pulp fiber or lacebark. In specific circumstances, fiber crops can be superior to wood pulp fiber in terms of technical performance, environmental impact or cost.[2]

There are a number of issues regarding the use of fiber crops to make pulp.[3] One of these is seasonal availability. While trees can be harvested continuously, many field crops are harvested once during the year and must be stored such that the crop doesn't rot over a period of many months. Considering that many pulp mills require several thousand tonnes of fiber source per day, storage of the fiber source can be a major issue.

Botanically, the fibers harvested from many of these plants are bast fibers; the fibers come from the phloem tissue of the plant. The other fiber crop fibers are hard/leaf fibers (come from the entirety of plant vascular bundles) and surface fibers (come from plant epidermal tissue).[1]

Fiber sources

To have a source of fiber to utilize in production, the fiber first must be extracted from the plant. This is done in different ways depending on the fiber classification. Bast fibers are harvested through retting which is where microbes are utilized to remove soft tissues from the plant and only the useful fibrous material remains. Hard fibers are harvested mainly through decortication which is where the non-fibrous tissues are removed by hand or machine. Lastly, surface fibers are harvested through ginning which is where a machine removes the fibers from other plant material.[citation needed]

Paper

Before the industrialisation of paper production the most common fiber source was recycled fibers from used textiles, called rags. The rags were from ramie, hemp, linen and cotton.[4] A process for removing printing inks from recycled paper was invented by German jurist Justus Claproth in 1774.[4] Today this method is called deinking. It was not until the introduction of wood pulp in 1843 that paper production was not dependent on recycled materials from ragpickers.[4]

Fiber crops

References

  1. ^ a b Levetin, Estelle; McMahon, Karen (2012). Plants and Society. New York, NY: McGraw-Hill. p. 297. ISBN 978-0-07-352422-1.
  2. ^ "Agripulp: pulping agricultural crops". Archived from the original on 2016-08-15. Retrieved 2007-10-03.
  3. ^ "Nonwood Alternatives to Wood Fiber in Paper". Archived from the original on 2007-07-08. Retrieved 2007-10-03.
  4. ^ a b c Göttsching, Lothar; Pakarinen, Heikki (2000), "1", Recycled Fiber and Deinking, Papermaking Science and Technology, vol. 7, Finland: Fapet Oy, pp. 12–14, ISBN 952-5216-07-1
  5. ^ Li, Yu; Fu, Jiajia; Wang, Hongbo; Gao, Weidong (September 2022). "Evaluation of bamboo water-retting for fiber bundle extraction". Textile Research Journal. 92 (17–18): 3289–3298. doi:10.1177/00405175211062048. S2CID 245297960.
  6. ^ Kovačević, Zorana; Vukušić, Sandra Bischof; Zimniewska, Malgorzata (2012). "Comparison of Spanish broom (Spartium junceum L.) and flax (Linum usitatissimum) fibre". Textile Research Journal. 82 (17): 1786–1798. doi:10.1177/0040517512447526. Retrieved 26 January 2024.
  7. ^ Strother, John L. "Tilia". Flora of North America. Missouri Botanical Garden & Harvard University. Retrieved 26 January 2024.

External links