Pine colorimetric analysis of variance
Variance name | s | f | v | F | Significant | |
A | 188.84 | 2.00 | 94.42 | 8.04 | * | |
B | 407.26 | 2.00 | 203.63 | 17.33 | ** | |
C | 345.31 | 2.00 | 172.66 | 14.69 | ** | |
A*B | 106.62 | 4.00 | 26.65 | 2.27 | ||
A*C | 2.38 | 4.00 | 0.59 | 0.05 | ||
B*C | 0.47 | 4.00 | 0.12 | 0.01 | ||
error | 94.00 | 8.00 | 11.75 | |||
F0.05(2,8)=4.5 | F0.05(4,8)=3.8 | |||||
F0.01(2,8)=8.7 | F0.05(4,8)=7 | |||||
1 is Torch Pine
2 is sycamore
4.5 Analysis of the first orthogonal experiment
As can be seen from Tables 3 and 6, the main factors affecting the dyeing rate are temperature, followed by time, and again concentration.
It can be seen from Table 4 and Table 7 that the main factor affecting the color of Platanus is time followed by concentration and again temperature. The main factor affecting the color of pine is concentration, followed by time, and again concentration.
The main influencing factors are as follows:
1 Dyeing liquid temperature Dyeing temperature is one of the main factors affecting the dyeing index. According to the statistical results of orthogonal experiment, the effect of dyeing temperature on dyeing and chromaticity can be seen. As shown in Fig. 1 and Fig. 2, it can be seen from the two figures that the dyeing effect is not good when the dyeing temperature is too low, and even if the dyeing time is prolonged, the dyeing rate and the chromaticity are still unsatisfactory.
2 dye concentration concentration is also a very important factor. Too high a concentration will result in waste, affecting economic and technical indicators, and reducing the dyeing effect when it is too low. It can be seen from the experimental results that when the concentration is below 5%, the concentration has a significant effect on the dyeing rate and the chromaticity. When the concentration is above 0.5%, the effect tends to be gentle, the dye concentration and the dyeing rate. The relationship between the chromaticity and the chromaticity is shown in Fig. 3 and Fig. 4. It can be seen that the concentration of the dyeing solution is preferably 0.5 to 0.6.
3 Dyeing time Dyeing time is one of the most important factors in the dyeing process. In dyeing production, it will determine the consumption of working hours, production cycle and production efficiency, which are important factors that directly affect economic benefits. Therefore, under the premise of ensuring the quality, the dyeing time is required to be as short as possible. The relationship between dyeing time and dyeing and chromaticity is shown in Fig. 5 and Fig. 6. It can be seen from the figure that the time factor below 50 minutes is significant. The impact of more than 50 minutes is stable.
The bath-to-bath ratio is also one of the factors directly affecting the production efficiency. The experimental results show that the bath ratio is more than 10:1. The dyeing effect must be considered while considering the production efficiency in the dyeing process. The bath ratio is preferably 10-15:1. If the bath ratio is below 10:1, the dyeing rate and surface quality are drastically reduced, which affects the dyeing effect.
5 It can be seen from the above figure that under the same factors, the dyeing rate of pine is higher than that of Platanus, and the color difference of Platanus is more obvious than that of pine. Possible reasons: the structure of pine is looser than that of Platanus, and the crystallinity of pine is higher than that of Platanus. Therefore, the dyeing rate is high, and the oil content of the single pine is more, which affects the adsorption of the dye, so the color difference sycamore is larger than the pine.
4.6 Second orthogonal test
The factors and levels of the second orthogonal test
Horizontal factor | PH value (A) | Penetrant JFC (B) | Moisture content © | Time (D) |
1 | 4 | 0.1% | 0.1 | 20MIN |
2 | 4.5 | 0.2% | 0.3 | 50MIN |
3 | 5 | 0.3% | 0.5 | 80MIN |
4.7 Second orthogonal experimental analysis
1 PH value
Since the acid dye is used, the pH value is also an important factor affecting the dyeing effect. When the dye is combined with the dyed material, it is necessary to have a good dyeing effect under suitable conditions. The effect of PH value on chromaticity and dyeing rate is shown in Fig. 7. Fig. 8. The chromaticity and dyeing rate of the value above 5.4 are larger, and the change is smaller at 3-4.
- Penetrant
Penetrants, also known as wetting or dispersing agents, are a class of surfactants whose function is to reduce the surface tension of dye liquors, to improve the wettability of dye liquors at the wood interface, the penetrant concentration versus color and dyeing. The effect of the rate is shown in Figure 9, Figure 10.
- Moisture content
It can be seen from this experiment that the water content has little effect on the color and dyeing rate and can be ignored.
- Wood is an anisotropic plant organism. The adsorption rate and adsorption capacity of dyeing rate are very different. There are often chromatic aberrations in different parts after dyeing. To adjust the fixing speed of dye on wood and add leveling agent, 1.5% is added in this experiment. Nacl.
postscript
This topic was completed under the careful guidance of Teacher Wu Yiqiang. Through testing and data processing analysis, we have a deeper understanding of the dyeing technology of thin wood. Practice has cultivated the spirit of hard work and hard work. The experiment has cultivated my meticulous and rigorous style of study. Data analysis exercises my own thinking ability, and I have benefited from logic analysis. Here, I would like to thank Mr. Wu for his careful guidance and the help of other teachers, and the support of the students. Due to time and my limited ability, mistakes or omissions are inevitable. I ask teachers and classmates to criticize and correct.
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