Different Types Of Fibers And The Distinguishing Characteristics Of An Unknown Fiber

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Introduction The purpose of this lab was to learn about the different types of fibers and the distinguishing characteristics of used to identify them. Natural fibers and man-made fibers were examined in this lab. The fibers tested were part of a multi-fiber fabric with the following arrangement: Acetate Cotton Nylon Silk Viscose (Rayon) Wool The first lab activity was to observe and record the characteristics of each of these fibers through a stain test, a microscope test, a solvent test, and a burn test. The second lab activity was to observe the characteristics of an unknown fiber thread and to identify the fiber by comparing its characteristics to the data from the first activity. The burn test is used to observe the reaction of a…show more content…
• Step 3: Slowly move the end of the thread toward the flame horizontally from the side. Note and record any observable reactions from the fiber as it approaches the flame. • Step 4: Ignite the end of the thread, and then remove it from the flame. Note how the fibers burn, any noticeable odors, and any extinguishing characteristics. • Step 5: After the flame has extinguished on the fiber, examine any remaining ash/residue. Note the color, form, and texture. • Step 6: Record observations. • Step 7: Repeat steps 1-6 for each fiber in the multi-fiber fabric. Solvent Test • Step 1: Place 18 test tubes in the test tube rack in three sets of six. • Step 2: Use a sharpie to label the test tubes in one set A1-A6, the next set H1-H6, and the last set S1-S6. • Step 3: Use forceps to obtain one thread of acetate from the multi-fiber fabric. • Step 4: Using scissors, cut the thread to obtain three 5-mm long pieces. Use forceps to drop one piece into each test tube labeled with a 1. • Step 5: Repeat steps 3-4 for each fiber, placing each fiber pieces into the respective numbered tubes. • Step 6: Using a different pipette for each solvent, add 1-mL of acetone to each test tube labeled with an A. Add 1-mL of hydrochloric acid to each test tube labeled with an H. Add 1-mL sodium hypochlorite to each test tube labeled with an S. • Step 7: After 5-10 minutes, observe and record any changes to each fiber in each

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