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Egamberdiev Elmurod Abdukodirovich, Doctoral, candidate of the chair "Technology of cellulose and woodworking" Tashkent chemical-technological institute Email: [email protected] Rakhmanberdiev Gappar Rakhmanberdievich, Professor, of the department "Technology of cellulose and woodworking" Tashkent chemical-technological institute Email: [email protected] Mardonov Asror Khasanovich, assistant, "Technology of cellulose and woodworking" Tashkent chemical-technological institute Email: [email protected]
STUDY OF THE SORPTION RATE OF COMPOSITION PAPER SAMPLES OBTAINED ON THE BASES OF CELLULOSE-BEARING PLANTS CELLULOSE AND BASALT FIBER
Abstract: Composite materials samples have been obtained from cellulose and bazalt fibers based on cellulose-bearing plants. The properties of paper samples have been studied: the amount of cellulose, the amount of ash, water absorption and breaking load. Gained results show that the composite material with the addition of basalt fibers is more durable. Half-finished cellulose fibers obtained from basalt, straw and wastepaper are more porous than ones obtained from cotton plant.
Keywords: basalt fiber, composite material, high-strenght-paper, topinambour, packaging material, heat-insulated material, paper and cardboard samples.
Introduction Uzbekistan has a very large source of raw materi-
It's hard to imagine a place without paper. World- als (guza-paya and rice straw, straw, hemp, etc.) to
wide, 339 mln. t. (2003 y), 350 thousand tons in obtain paper from annual plants.
Russia (2000 y). According to the 2009 year data, Nowadays, as the demand for paper and paper
paper produced in Uzbekistan provides 10% of the products is rising, it has called us to obtain other
demand for this product. The rest of the paper is im- types of paper products. For this purpose, a series
ported from foreign countries. of investigations have been carried out.
In recent years, paper production has been ex- Cellulose-containing wastes, annual plants cel-
panding from year to year. About 75% of annual pa- lulose and other ingredients can be obtained from
per produced in the world is produced in the Peo- different compositional properties. The composi-
ple's Republic of China, and the country meets 50% tion of the cellulose solution, the one-dimensional
of its own demand for paper with paper obtained mixtures, is a mixture of acrylamide ingredients,
from annual plants. which is characterized by the formation of any
trimmed compositions. Among these local raw materials in our Republic is basalt fiber with heat stability and durable properties. Basalt fiber tends to crystallize more easily than other glass fibers. It is resistant to heat, chemical effects and combustion and is highly durable. Therefore, it is used to produce composite plastics instead of asbestos, which is a concentrate (conserogen). We have chosen the basalt fiber extracted in Asmosoy, our Republic, for the experiment. The fluid temperature of this fiber is 1250 ° C, which is much lower than the one in other places.
Objects and methods.We obtained paper samples on the bases of annual composite materials based on the annual cellulose and basalt fibers and studied their properties. The main purpose of the work is to increase the strength of the paper, reduce its burning and moisture absorbing.
We have obtained five different composite materials containing cellulose and basalt fibers. As a raw material, the following materials were used to prepare cellulose compositions: basalt, topinambur, cotton lint, cellulose derived from guza-paya. The composition of the humid composition composite material was made in the laboratory by mixing basalt fiber with cellulose from each of them separately, in equal quantity. The prepared mass was diluted for 1-1.5%, and the paper was pulled into the paper-making machine. When the cylinder of the apparatus is gently lifted together with the net, at the end of the water, the wet cellulose layer is formed. The generated cellulose layer is brought together with a net and dehydrated at a drying pad for 105-110 ° C up to 75-80% moisture. Then it is press (fig. 1) on the press until the desired thickness is reached and kept in the press for 30 minutes.
Figure 1. Laboratory filter-press: 1 - base; 2 - handle; 3 - screw; 4 - screwer; 5 - monometer; 6 - movable plate; 7 - unmovable plate; 8 - wet cardboard; 9 - metal disk
The sample is dried again up to 5-6% moisture. other physicochemical and heat conductivity and
It is cut by 6 x 6 cm and the mass is determined thermal parameters are determined. In this article
with the analytical weights. The thickness of the we basically examine the absorption degree of
sample is measured using a shaft. All samples were composite paper samples. The mass of the molded
molded in the same manner. After drying, the tech- samples has been determined. nical parameters of the samples are determined and
The next step is to determine the sorption degree of the composition. Methods for determining the samples sorption degree:
1. Take 1 g of samples to determine the swelling degree and is swelled in the water for 30 minutes. Then the mass of excess water is determined by rotating the water over time and then turning the centrifuge to 5,000 times per minute.
2. Samples are kept in the water for 30 minutes and then put the two pieces of pulp between disks and the excess water is 2 kg. The mass is determined removing the excess water with power.
Table 1. - The absorption rate of composite
3. To determine the mass after storage for 24 hours generating a relative humidity with 70% in the concentrated soda ash state.
We studied the sorption properties of the obtained materials. This job has been completed according to the above-mentioned methodical instructions. For this purpose, soaking samples in the water, the amount of absorbed water, the sagging rate and the degree of absorption of relative humidity by 70%. The absorption rate of samples is shown in the table below.
paper samples is shown in the table below
№ Name Weight, g Absorption rate,%
dry wet
1. The paper obtained on the basis of topinambour cellulose 1.0 1.70 70
2. The paper obtained on the bases of basalt fibre and topinambour cellulose 1.0 1.40 40
3. The paper obtained on the basis of poplar cellulose 1.0 1.76 76
4. The paper obtained on the bases of basalt fibre and poplar cellulose 1.0 1.40 40
5. The paper obtained on the basis of cotton lint cellulose 1.0 2.15 115
6. The paper obtained on the bases of basalt fibre and cotton lint cellulose 1.0 1.60 60
7. The paper obtained on the basis of wheat straw cellulose 1.0 2.40 140
8. The paper obtained on the bases of basalt fibre and wheat straw 1.0 1.71 71
9. The paper obtained on the bases of guza-paya cellulose 1.0 2.11 111
10. The paper obtained on the bases of basalt fibre and guza-paya cellulose 1.0 1.70 71
11. The paper obtained on the bases of basalt fibre 1.0 1.16 16
As it can be seen from the table, the composition of the composition paper sample based on topinambur and cotton linter cellulose and basalt fiber is about 40-60%, which is a positive result. Our goal is to introduce paper-based composite paper into different industries. At the next stage of our experiments, we investigated the degree of sorption of moisture from relative humidity by about 70% of the composition paper sample.
As it can be seen from the table, the sorption of moisture from air depends on the composition
of samples. In this table, the composition paper sample based on topinambour and cotton lint cellulose and basalt fiber constitutes about 3% of the amount of moisture absorption. These figures describe the structure of the paper samples. The more samples absorb moisture, the more likely the cellulose fibers will be in the porosity. Therefore, paper samples obtained from the poplar, straw and stalks of cellulose and basalt fibers are stiffer than paper samples obtained from cotton lint and topinambur cellulose.
Table 2.- The sorption degree of moisture from air with relative humidity of 70% of composition paper
№ Name Weight, g Absorption
dry wet rate,%
1. The paper obtained on the basis of topinambour cellulose 1.0 1.6 160
2. The paper obtained on the bases of basalt fibre and topinambour cellulose 1.0 1.03 103
3. The paper obtained on the basis of poplar cellulose 1.0 1.5 150
4. The paper obtained on the bases of basalt fibre and poplar cellulose 1.0 1.04 104
5. The paper obtained on the basis of cotton lint cellulose 1.0 1.6 160
6. The paper obtained on the bases of basalt fibre and cotton lint cellulose 1.0 1.03 103
7. The paper obtained on the basis of wheat straw cellulose 1.0 1.7 170
8. The paper obtained on the bases of basalt fibre and wheat straw 1.0 1.04 104
9. The paper obtained on the bases of guza-paya cellulose 1.0 1.6 160
10. The paper obtained on the bases of basalt fibre and guza-paya cellulose 1.0 1.04 104
11. The paper obtained on the bases of basalt fibre 1.0 1.01 101
At the next stage, we blended the annual plants cel- obtained the paper samples and studied their proper-lulose and basalt fibers in different composition and ties. We've presented the results in the table below.
Table 3.- The sorption rate of paper obtained on the bases of basalt fiber and topinambour cellulose
№ The name and content of composition Weight, g Absorp-
dry wet tion rate,%
1. The paper obtained on the bases of basalt fibre and topinambour cellulose, 25:75 1.0 1.69 69
2. The paper obtained on the bases of basalt fibre and topinambour cellulose, 50:50 1.0 1.40 40
3. The paper obtained on the bases of basalt fibre and topinambour cellulose, 75:25 1.0 1.29 29
4. The paper obtained on the basis of basalt fibre, 100 1.0 1.16 16
Table 4.- The sorption rate of paper obtained on the bases basalt fiber and wood cellulose
№ The name and content of composition Weight, g Absorp-
dry wet tion rate,%
1 2 3 4 5
1. The paper obtained on the bases of basalt fibre and wood cellulose, 25:75 1.0 1.71 71
1 2 3 4 5
2. The paper obtained on the bases of basalt fibre and wood cellulose, 50:50 1.0 1.40 40
3. The paper obtained on the bases of basalt fibre and wood cellulose, 75:25 1.0 1.33 33
4. The paper obtained on the basis of basalt fibre, 100 1.0 1.16 16
Table 5.- The sorption rate of paper obtained on the bases of basalt fibre and cotton lint cellulose
№ The name and content of composition Weight, g Absorp-
dry wet tion rate,%
1. The paper obtained on the bases of basalt fibre and cotton lint cellulose, 25:75 1.0 1.87 87
2. The paper obtained on the bases of basalt fibre and cotton lint cellulose, 50:50 1.0 1.60 60
3. The paper obtained on the bases of basalt fibre and cotton lint cellulose, 75:25 1.0 1.41 41
4. The paper obtained on the basis of basalt fibre, 100 1.0 1.16 16
Table 6.- The sorption rate of paper obtained on the bases of basalt fibre and wheat straw cellulose
№ The name and content of composition Weight, g Absorp-
dry wet tion rate,%
1. The paper obtained on the bases of basalt fibre and wheat straw cellulose, 25:75 1.0 1.90 90
2. The paper obtained on the bases of basalt fibre and wheat straw cellulose, 50:50 1.0 1.71 71
3. The paper obtained on the bases of basalt fibre and wheat straw cellulose, 75:25 1.0 1.47 47
4. The paper obtained on the basis of basalt fibre, 100 1.0 1.16 16
Table 7.- The sorption rate of paper obtained on the bases of basalt fibre and guza-paya cellulose
№ The name and content of composition Weight, g Absorp-
dry wet tion rate,%
1. The paper obtained on the bases of basalt fibre and guza-paya cellulose, 25:75 1.0 1.89 89
2. The paper obtained on the bases of basalt fibre and guza-paya cellulose, 50:50 1.0 1.71 71
3. The paper obtained on the bases of basalt fibre and guza-paya cellulose, 75:25 1.0 1.45 45
4. The paper obtained on the basis of basalt fibre, 100 1.0 1.16 16
As it can be seen in the tables above, that the composition, the more the sorption rate of compo-more the basalt fibre is added into the content of sition paper decreases. It is also worth mentioning
that the most optimal variant of our paper, based on will find examples of composition paper through basalt fiber and topinambour cellulose. Below you experiments.
The paper obtained on the bases of The paper obtained on the bases of basalt fibre and wheat straw cellulose basalt fibre and cotton lint cellulose (1:1) (1:1)
The paper obtained on the bases of The paper obtained on the bases of basalt fibre and poplar cellulose basalt fibre and guza-paya cellulose
(1:1) (1:1)
The paper obtained on the bases of basalt fibre and topinambour cellulose
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