JAWAHAR NAVODAYA VIDYALAYABARGARH INVESTIGATORY PROJECT ON CHEMISTRY TOPIC:-PREPARATION OF RAYONS THREAD FROM FILTER PAPER PREPARED BY :- MAHESH KAR CBSE ROLL.NO:- GUIDED BY:-Mr.M.S.BEHERA (PGT CHEM.) ) Sign of Principal External examiner .S. CERTIFICATE This is certify that Master Mahesh kar of Class xii CBSE roll no:- Has worked on the research project- “PREPARATION OF RAYON THREAD FROM FILTER PAPER” And completed the same successfully during academic year 2017-2018 Mr.Behera (PGT Chem.M. Bargarh. I am also thankful to the lab attendant for support during the time of doing project work. K. under whose guidance I am privilege to do this work. . Sobhan Babu who always inspired me during this project work. I am thankful to Principal Mr.C. In this I am always indebted to Mr. Bhoi TGT Science of our school for their kind corporation on this project work. Behera (PGT CHEMISTRY) of JNV Paikmal.M. ACKNOWLEDGEMENT I am extremely grateful my learned guide Mr.S. I am also thankful to my parents for this piece of work by not only providing financial but also boosting my spirit so that I could work constantly. T. I am also appreciated and gratifying my sincere thanks to them. CONTENTS Aim of the Experiment Introduction Apparatus Required Chemicals Required Theory Procedure Observation Conclusion Precautions Characteristic of Rayon Thread USES Bibliography . AIM OF THE EXPERIMENT “PREPARATION OF RAYON THREAD FROM FILTER PAPER ’’ . . rayon and other products. Wood has now become the main source of cellulose. The remaining pulp. about 93% cellulose. It is the fibrous material that every plant from seaweed to the sequoia makes baking glucose molecules in long chains. . is dried and rolled into sheets-raw material for paper. Since it contains only 40% to 50% cellulose. and then simmered in chemicals that dissolve the tarry lignin.The logs are flaked. Cellulose is nature’s own giant molecule. the chains are bound together in the fibres that give plants their shape and strength. resins and minerals. the substances must be extracted by ‘pulping ’. INTRODUCTION Rayon is a synthetic fibre produced from cellulose. APPARATUS REQUIRED:- Conical flask (preferably 250ml) Funnel Glass rod Beaker (preferably 250ml ) Water bath Filter paper CHEMICALS REQUIRED:- CuSO4 NaOH solution Liquor ammonia solution Dilute H2SO4 Whatman paper Distilled H2O . which is dissolved in NaOH solution to give viscous solution.This gives cellulose xanthate. The alkali CuSO4. This is filtered and forced through a spinneret into a dilute H2SO4 solution. The process of making viscose was discovered by C. both of which harden the gum like thread into rayon fibres.Bevan in 1891. THEORY:- Rayon can be obtained in 2 ways:- 1). Cross and EJ. .F.VISCOSE PROCESS:-Cellulose is soaked in 30% caustic soda solution for about 3 hrs. The latter is obtained from a solution of copper sulphate to it. which is then dissolved in excess of NH3.CUPRAMMONIUM RAYON:-Cuprammonium rayon is obtained by dissolving pieces of filter paper in a deep blue solution containing tetra- ammine cupric hydroxide. (NH)4OH solution is added to precipitate cupric hydroxide. . CUSO4 + 2NH4OH → Cu (OH) 2+ (NH4)2SO4 Cu (OH) 2 +4NH4OH → [Cu (NH3 )4 ](OH )2 +4H2O [Cu (NH3 )4 ](OH )2 + pieces of filter paper left for 10-15 days give a viscous solution called VISCOSE.2). The precipitate of cupric hydroxide is separated out. The viscose solution was taken in a syringe and was squeezed out keeping the hand in motion into a 5M H2SO4 solution .Weigh 20 gm of CuSO4. This is known as SCHWEITZER’S SOLUTION. Seal the flask and keep for 10 to 15 days. Filter the solution containing cupric hydroxide through a funnel with filter paper. Transfer the precipitate to beaker that contains 50ml of liquor ammonia or wash it down the funnel.NaOH to prevent hydrolysis of CuSO4. Wash the precipitate of cupric hydroxide with water until the filtrate fails to give a positive test for sulphate ions with barium chloride solution. Add 11ml of liquor ammonia drop by drop with slow stirring. during this period the filter paper is dissolved completely. The precipitate when dissolved in liquor ammonia gives a deep blue solution of cuprammonium hydroxide.transfer this to beaker having 100 ml distilled water and 15 ml dil.It was then kept for one day till blue colour of the rayon filament became white. Stired it with a glass rod till a clear solution is obtained.5H2O . After weighing 2gm of filter paper divide it into very fine pieces and then transfer these pieces to the cuprammonium hydroxide solution in the beaker. Rayon filaments were then removed out from the acid bath and were washed with water dried by keeping then on the filter paper . The fumes if inhaled may cause giddiness.0g. it would clog the needle of the syringe. OBSERVATION Weight of filter paper taken=1. .2g. Sample of cuprammonium Rayon thread was successfully prepared. (c))Addition of NH3 should be done in a fume cupboard and with extreme care. Weight of rayon filament obtained= 1. o Addition of excess NH3 should be avoided. (b) Before taking the viscose in the syringe make sure that it does not contain any particles of paper. otherwise. Maximum length of the rayon =32cm. (d)Use a thick needle otherwise the fibres won’t come out. . Developed in an attempt to produce chemically. Rayon mixed with wool is used to prepare carpets. they are highly absorbent soft and comfortable easy to dye drape well In textile industries for making textile (fibre) like saree. In tyre industries for tyre cord.Rayon is a regenerated fibre. it was originally called artificial silk or wood silk . For example. In medical field for preparing bandages and surgical dressing . because cellulose is converted to a liquid compound and then back to cellulose in form of fibre. cuprammonium rayon is made by dissolving cellulose in an ammoniacal copper sulphate solution. CHARACTERISTIC OF RAYON THREAD:- Rayon is a synthetic fibre produced from cellulose. liveworld.com .google.allprojects.com www.com www. Modern’s Chemistry GRB Chemistry www.