The logs are flaked, and then simmered in chemicals that dissolve the tarry lignin, resin s and minerals. Since it contains only 40% to 50% cellulose, the substance must be extracted by pulping. Wood has now become the main source of cellulose.
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It is the fibrous material that every plant from seaweed to the sequoia makes by baking glucose molecules in long chains the chains are bound together in the fibers that give plants their shape and strength. IntroductionCellulose is natures own giant molecule. The characteristics of rayon fibers are: They are highly absorbent, Soft and comfortable, Easy to dye & Drape well. For example, cuprammonium rayon is made by dissolving cellulose in an ammoniacal copper sulphate solution. Rayon is a regenerated fiber, because cellulose is converted to a liquid compound and then back to cellulose in the form offiber. Developed in an attempt to produce silk chemically, it was originally called artificial silkor wood silk. Preferably, Whatman)Ī) CuSO4 b) NaOH solution c) Liquor ammonia solution d) Dilute H2SO4 e) Whatman Paper f) Distilled H 2OīackgroundRayon is a synthetic fiber produced from cellulose.
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The references taken in making this project have been declared at the end of this report.ĪimTo prepare a sample of cuprammonium rayon threads from filter paper.Īpparatus Requireda) Conical flask (preferably 250 ml) b) Funnel c) Glass rod d) Beaker (preferably 250 ml) e) Water bath f) Filter paper (Whatman paper or ordinary filter paper sheets. This project is absolutely genuine and does not indulge in plagiarism of any kind. This is to certify that XXX YYY, a student of class XII has successfully completed the research project on the topic Sterilization of Water by using Bleaching Powder under the guidance of Mrs.MohiniBelani (Subject Teacher).