Methods for preparing composite materials from fibers.

Abstract

Invention details;

Claims

ocr1. The process of preparing composite materials from fibers involves the following steps: Preparation of raw materials from natural fibers: a. Cut the core and husk of natural fibers into pieces, weigh 0.5-1.5 kg, and then dry them at 80-120 degrees Celsius for 2-6 hours. b. Grind the natural fibers obtained from step a until a suitable coarse powder is obtained. Grind using a grinder and then dry at 80-120 degrees Celsius for 2-6 hours. c. Mix the coarse powder obtained from step b...

1. Spin the fibers at a speed of 30,000-40,000 revolutions per minute (rpm) for 10-30 minutes.

2. Sift the fibers through a sieve and dry them again at a temperature of 80-120 degrees Celsius for 2-6 hours until the weight of the fibers is constant.

3. Mix 50-200 grams of the prepared fiber powder with a solution at a ratio of sodium hydroxide solution to fiber powder of 1:

12.

4. Spin the solution obtained from step d at a speed of 500-1,000 revolutions per minute (rpm) at a temperature of 80-120 degrees Celsius for 2-6 hours.

5. Take the solution obtained from step e...The fibers are filtered using a vacuum filter system and washed with distilled water until the pH reaches 6-7. They are then dried at 80-120 degrees Celsius for 10-14 hours to obtain natural fiber powder. This powder is then bleached and molded into composite materials. Bleaching of natural fibers: Prepare an acetate buffer solution by mixing 34 grams of sodium chloride (3.4% by weight / volume) with 3.4 ml of sodium chloride in 1000 ml of water. Mix 50-200 grams of the prepared natural fiber powder with the solution in a ratio of solution to natural fiber powder. 1:

20. Then, mix thoroughly at a speed of 500-1,200 revolutions per minute (rpm) at a temperature of 80-120 degrees Celsius for 2-6 hours, at least one cycle. Filter the resulting substance using a vacuum filter, wash with distilled water to achieve a pH of 6-7, and dry at a temperature of 80-120 degrees Celsius for 2-6 hours. After bleaching the fiber powder is complete, the product is molded into reinforced concrete composite material, and its molding properties are improved. Further property improvement is achieved by incorporating the fibers from step 1.The cellulose fibers were extracted using an ethanol solution mixed in a 1:2 ratio, followed by further extraction with 72% sulfuric acid (H2SO4). Subsequently, they were extracted with 17.5% sodium hydroxide to remove hemicellulose, leaving only alpha-cellulose. The prepared cellulose fibers were then improved using a plasma machine with gas-assisted plasma dispersion for 10-30 minutes, and subsequently used to form a composite material mixed with fiberglass.

2. The method for preparing the composite material from the fibers as described in claim 1, which...

1. A sodium hydroxide solution is prepared from 300-400 g of sodium hydroxide in 2,000 ml of water.

2. A method for preparing fiber composite materials according to claim 1 in which an acetate buffer solution is prepared from 54 g of 5.4% by weight / volume (w / v) sodium hydroxide mixed with a 15% by weight / volume (w / v) acetic acid solution in 1,000 ml of water.

3. A method for preparing fiber composite materials according to claim 1 in which an ethanol mixture solution is prepared from ethanol mixed with benzene. 4.

6. The process for preparing fiber composite materials under Patent 1 where the plasma ignition gas is selectable from argon (Ar), argon-nitrogen mixture (Ar+N2), or argon-oxygen mixture (Ar+O2), either individually or in combination.

7. The process for preparing fiber composite materials under Patent 1 where the optimal plasma ignition power is 150-180 watts.

8. The process for preparing fiber composite materials under Patent 1 where the forming of the fiberglass composite material is achieved by combining natural cellulose fibers with fiberglass fibers in a twisted manner and epoxy coating for strength or by machine forming.

9. The process for preparing fiber composite materials under Patent 7 where the forming of the fiberglass composite material is further enhanced by an epoxy coating over the fiber composite material.

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