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Identification method of sources of recycled cellulose fiber pulps

A technology of regenerated cellulose and fiber pulp, which is used in measuring devices, instruments, material analysis by electromagnetic means, etc., can solve the problems of category differences, and there is no pulp traceability identification method for regenerated cellulose fibers, and achieves breakthroughs in limitations. sexual effect

Inactive Publication Date: 2019-03-15
上海市合成纤维研究所有限公司 +1
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  • Application Information

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Problems solved by technology

[0005] In order to solve the problem that the current regenerated cellulose fiber has no feasible pulp traceability identification method, the present invention is based on the isotope δ in plants due to the difference in photosynthesis, water and soil and temperature. 18 O, δ 13 The botanical mechanism of the obvious class difference in the ratio of C and δD provides a way to track δ using stable isotope technology 18 O, δ 13 C, δD content and difference, establish discriminant eigenvalue table, so as to trace the method of identification of regenerated cellulose pulp

Method used

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  • Identification method of sources of recycled cellulose fiber pulps
  • Identification method of sources of recycled cellulose fiber pulps
  • Identification method of sources of recycled cellulose fiber pulps

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Embodiment Construction

[0016] 1. Establish the identification feature table

[0017] Firstly, the main domestic and foreign manufacturers of regenerated cellulose are counted, and the pulp fibers of different raw materials are sampled. It is found that there are three main types of mainstream pulp: wood pulp, cotton pulp, and bamboo pulp. Cellulose fiber samples from different origins were subjected to sample purification pretreatment and dried to constant weight. Detection of stable isotope δ in collected samples 18 O, δ 13 C, δD value, establish the identification characteristic value table, the same as Table 1.

[0018] where: δ 18 O and δD were determined by high temperature pyrolysis-stable isotope mass spectrometer (Flash EA 1112 HT-Delta VAdvantages, Thermo Company); δ 13 C was determined with an elemental analyzer-stable isotope mass spectrometer online (Flash EA 1112HT-Delta V Advantages, Thermo Corporation).

[0019] 2. Collection and preprocessing of samples to be tested

[0020] Th...

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Abstract

In order to solve the problem that at present, no feasible pulp source identification method exists for recycled cellulose fibers, the invention provides an identification method by which according toa botanical mechanism that significant categorical differences in ratios of isotopes delta18O, delta13C and deltaD in plants exist due to differences in the photosynthesis, the soil and water and thetemperature, the contents and the differences of the delta18O, the delta13C and the deltaD are tracked according to a stable isotope technology to establish a discriminant eigenvalue table so as to identify the sources of the recycled cellulose pulps. According to the method provided by the invention, detection indexes are few, the detection accuracy is high, the reproducibility is good and the operability is strong.

Description

technical field [0001] The invention relates to a method for identifying textile raw materials, in particular to a method for identifying the source of regenerated cellulose fiber pulp by measuring stable isotope characteristic values. Background technique [0002] Regenerated cellulose fiber is a pure natural "green" fiber made from the pulp of natural cellulose (such as cotton, hemp, bamboo, tree, and shrub) by changing the physical structure without changing the chemical structure. Because the texture and wearing comfort are better than synthetic fibers, and the cost and spinnability are better than those of natural fibers, regenerated cellulose fibers have become the new favorite raw material for all kinds of medium and high-end textiles. [0003] The global natural cellulose pulp market is complex, with scattered production capacity distribution and large price differences. However, regenerated cellulose fibers produced from different pulp sources have the same chemical...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/02G01N30/72G01N27/62
CPCG01N27/62G01N30/02G01N30/72
Inventor 李赛付昌飞石浩然邢亚均解德诚陆秀琴李红杰夏坚琴顾进魏奕雯薛丽云
Owner 上海市合成纤维研究所有限公司
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