A Breakthrough In Cellulose Research

< p > sea squirt is an ordinary marine organism. It is distributed in various oceans because it is shaped like pineapple, also known as pineapple in the sea.

Because the content of glycogen in the sea squirt is high and its taste is sweet, it has always been a delicacy on the table at the seaside.

What is little known is that the sea squirt is also the only animal that can produce cellulose in the world. If it can be used in the field of < a target= "_blank" href= "http://www.91se91.com/" > textile > /a > a target= "_blank" href= "http://www.91se91.com/" > clothing > field, it will bring great changes to the industry.

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< p > recently, at the finals of the first national college students' innovation and entrepreneurship competition for polymer materials in China, Zhang Da, a student of materials engineering major in polymer College of Qingdao University of Science & Technology, attracted extensive attention in the field of research on the sea cucumber cellulose.

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< p > < strong > change waste into treasure, create new fiber < /strong > /p >

< p > the sea squirt used to be used only as food, and its capsule can not be eaten but abandoned.

The cellulose produced by the sea squirt is in the capsule of the sea squirt.

How to turn waste into treasure? This topic has become the research direction of the research group. Now, the sea sac, which has been thrown away as garbage, has become the raw material for developing new industries.

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< p > Zhang Dawei told reporters that since his discovery of cellulose in 2009, his team has broken through a number of key technologies, and developed new special power materials, such as energy saving reflective thin film of sea squirt cellulose, high performance conductive paper from sea shell cellulose and sea cucumber cellulose spinning liquid, and so on. With the cellulose as the origin, the antenna has been extended to many fields in the country, and has obtained 7 national invention patents.

The production of a series of new industries will be driven by the cellulose products of the sea squirt. The application of new technology will also bring more economic benefits to enterprises and individuals.

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< p >, how did Zhang Dawei think about this topic? < /p >

< p > originally, cellulose was widely distributed not only in the cell walls of higher plants but also in the capsule of sea squirt.

Studies have shown that ASP cellulose has many unique characteristics compared with plant cellulose.

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< p > "more than 90% of the former is I beta crystal, and its crystallinity is high, while the latter has only I beta form of 50%-70%.

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< p > at present, there are only reports on the extraction of marine drugs from sea squirt in China.

Zhang Dawei told reporters.

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< p > at the same time, the sea squirt nano a href= "http://www.91se91.com/news/index_f.asp" > fiber < /a > can spontaneously form cholesteric liquid crystal at certain concentration.

Cholesteric liquid crystal has excellent optical properties, such as optical anisotropy, birefringence and selective reflectivity. Zhang Dawei believes that this project is expected to be used in anti-counterfeiting materials, decorative coatings, reflective color electronic paper and other fields after its success.

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"P >, therefore, Zhang Dawei envisages that it is possible to extract cellulose from the capsule of the sea sac by human beings in a way." /p >

After 4 years of research, Zhang has successfully prepared nanoscale cellulose, and studied the morphology and structure of the cellulose by polarized light microscope, infrared spectrometer, atomic force microscope and scanning electron microscope (P).

The results showed that the powder of the prepared sea squirt cellulose sample was almost I beta crystal. The nanoscale cellulose of the sea squirt was a rod like structure with a uniform diameter, the average diameter was about 30nm, and the length was between 200nm and 2 m.

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At the same time, Zhang Dawei also found that when the P suspension reached a certain concentration, it could spontaneously form cholesteric liquid crystals, and cholesteric liquid crystal films had a selective reflectivity and showed a rainbow like color under the irradiation of natural light.

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"P > < strong > blue material can be widely used in < /strong > < /p >

< p > industry experts have said that in the field of science and technology, the achievement of industrialization is often faced with the embarrassing situation of "reality and bone".

However, the technology of sea shell cellulose spinning technology developed by Zhang has solved the problem of pformation of achievements.

The new marine garments made from sea cucumber cellulose have successfully captured the hearts of Qingdao enterprises.

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< p > cellulose is the main raw material for the production of garments. The molecular weight of the sea shell cellulose is 2.5 times higher than that of the cotton cellulose. Therefore, its strength is higher than that of cotton cellulose, and its permeability and thermal stability are good, non-toxic, harmless and safe. It can be biodegradable and helps to save energy and protect environment.

Zhang Dawei told reporters that such clothing is less irritating to the human body and that people wear it more comfortably.

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After understanding the performance and characteristics of the new technology, Qingdao snow Group Co., Ltd. launched an olive branch on its own initiative, P.

The two sides have signed an intention cooperation to jointly develop the high added value of the sea cucumber cellulose spinning and clothing products.

At present, the project has entered the pilot stage, and it is expected to achieve large-scale production in 2015.

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Besides, P can also be applied to the field of medicine.

Zhang Dawei said: "most commonly used medical gauze is made of cotton cellulose.

Compared with cotton cellulose, the sea cucumber cellulose has excellent mechanical properties and biocompatibility. Therefore, medical gauze made from sea cucumber cellulose will accelerate at least 20% of the wound healing.

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What P can't imagine is that cellulose from the sea squirt can also help people identify the authenticity of the renminbi.

"The strength of the renminbi is not very high now. In Australia, New Zealand and other countries, plastic materials have been used instead of traditional paper currencies. They can not only be recycled, but also contain unique anti-counterfeiting techniques."

Zhang Dawei said, "the use of sea squirt cellulose as raw material of RMB can not only increase strength, but also replace the existing anti-counterfeiting technology of RMB and bonds, making it easier for people to distinguish authenticity."

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< p > although this is true, because of the many techniques involved in the anti-counterfeiting of the RMB, the related technologies are very comprehensive and strictly confidential. Zhang Dawei has repeatedly stressed that through the processing of related technologies, some technology can be replaced.

But whether it is feasible or specific at the moment is still unknown.

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< p > data from the China Federation of textile industry show that in 2012, China's textile raw material consumption accounted for 52% of the world's total, while the import of textile raw materials accounted for more than 65%.

At present, 30% of China's textile raw materials and 70% of wool need to import, there is a big gap in fiber supply.

This situation poses a severe challenge to the adjustment of domestic textile raw material structure.

How to save resources and develop new fibers is becoming an urgent task for the sustainable development of the industry.

The development of sea squirt cellulose has undoubtedly alleviated this problem.

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< p > after 4-5 years of < a href= "http://www.91se91.com/news/index_c.asp" > /a >, the application technology of sea shell cellulose in home textile, paper making and energy saving materials has been gradually recognized. Its broad prospects of development in the fields of high-grade textiles, reflective pparent non-woven fabrics, anti-counterfeiting materials, decorative coatings, display materials and infrared shielding energy saving materials are attracting investors' attention.

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