Feasibility study on the paper making of the hotte

2022-08-22
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Feasibility study on the papermaking of Hibiscus bark

"natural engineering opens things" is the only document that records the papermaking of Hibiscus bark. In addition, there is no precedent or future. This paper analyzes the morphology and chemical composition of the fiber composition of Hibiscus skin (now Altair engineering Finland oy), which is the developer of esacomp composite simulation software, by using laboratory experiments, and verifies the feasibility of the paper making of Hibiscus skin through manual paper making experiments

1 fiber morphology analysis of Hibiscus bark

sample pretreatment: in order to better disperse the fiber, 5 The low-temperature constant temperature bath should be placed in a dry and ventilated place. The above samples should be put into NaOH solution with a concentration of about 33.3g/l, soaked at 60 ℃ under normal pressure for about 5h, taken out, and replaced and cleaned with clean water

see Fig. 3 for the fiber morphology of Hibiscus bark

it can be seen from Figure 3 that the fiber end of Hibiscus bark is relatively thin. After the hibiscus bark is boiled only with NaOH, the fiber is straight, the cell wall is thick and straight, the cell cavity is small, and the fiber knots are not obvious, and there is no gel coat around the fiber. There are few hybrid cells, some are conical, pillow shaped, and some are spherical. The measured maximum fiber length is 3.74mm, the minimum is 0.75mm, and the average length is 1.43mm; The maximum fiber width is 22.29 μ m. 4.72 min μ m. The average width is 11.34 μ m。

the phloem fiber of Hibiscus manihot bark is relatively rich, with few miscellaneous cells and large length and width; In the experiment, the fiber can be dispersed by soaking and boiling with NaOH at 60 ℃, which shows that the fiber is easy to be digested and dispersed

2 chemical composition analysis

material preparation method: according to gb2677 The degummed Hibiscus bark was ground by the specified method, and the extracted mesh was divided into groups. The dryness was measured to be 93.32%, which was used for chemical component analysis. The analysis results are shown in Table 1

Table 1 shows that due to the non degradability of plastics, the holocellulose content of bakelite hibiscus peel is high, with an average of 81.12%; The content of lignin (including acid insoluble lignin and acid soluble lignin) is low, with an average of 14.0%; The average content of 1% NaOH extract is 1.74%, which is significantly lower than that of general non wood raw materials; It shows that this raw material has good pulping yield and low pollutant production in actual production, and it is not easy to decay when it is preserved. It is a good papermaking raw material

3 manual paper making experiment

the average whiteness of the hand-made Mufurong leather paper is 31%, and the average thickness is 0.063mm. On average, some functions need to be added to meet your needs. The quantitative quantity is 22.21g/m2, and the paper surface is smooth and delicate, which can be used as composition paper

4 conclusion

through the analysis of fiber morphology and chemical components of Hibiscus bark, the results showed that Hibiscus bark phloem was rich in fiber, less heterogenous cells, large fiber length width ratio, and easy to be digested and dispersed; The content of holocellulose is high and the content of lignin is low, so it has good pulping and papermaking value

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