Method for evaluating interfiber bonded area of high-yield pulp by using confocal laser scanning microscope (CLSM)

A high-yield pulp and bonding area technology, applied in the field of pulp and papermaking, can solve the problems of undetected pulp fiber actual bonding area, no detection instrument and operating parameters, introduction of problems and their solutions, etc., to achieve high accuracy, Good adaptability, avoid interference effect

Inactive Publication Date: 2017-07-11
TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0012] 1), Groups 1, 2, 3 and 4 are limited to laboratory research on the bonding area between chemical pulp fibers, focusing on the basic theory of chemical pulp bonding properties, and do not focus on high-yield pulp fibers ( The performance of high-yield pulp fibers is very different from that of chemical pulp fibers, such as: fiber shape, surface morphology, deformation properties, etc.) To explore the feasibility and accuracy of testing the bonding area between fibers in the laboratory, let alone combine the testing methods used The instrument and operating parameters introduce the possible problems and solutions of the detection method in actual operation
[0013] 2), Documents in groups 1 and 5 mainly introduce the laboratory detection method of the relative bonding area RBA between pulp fibers, but do not detect the actual bonding area between pulp fibers; although the literature in groups 2,

Method used

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  • Method for evaluating interfiber bonded area of high-yield pulp by using confocal laser scanning microscope (CLSM)
  • Method for evaluating interfiber bonded area of high-yield pulp by using confocal laser scanning microscope (CLSM)
  • Method for evaluating interfiber bonded area of high-yield pulp by using confocal laser scanning microscope (CLSM)

Examples

Experimental program
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Embodiment 1

[0063] Take 60g of poplar P-RC APMP pulp produced by a certain factory and soak it in 1L of deionized water for 4 hours; the pulp after soaking will be depotentized. The pulp after submergence is dissociated with a standard fiber dissociation machine, and the dissociated pulp is classified with a Bauer sieve using 30, 50, 100 and 200-day screens, and the sieves are collected. The pulp fibers of the four fractions obtained by dividing; measure the solid content after equalizing the moisture, and set aside;

[0064] Take an appropriate amount of R30 fraction poplar P-RC APMP pulp fibers obtained by the above sieving and soak in deionized water for one week; use 5×10 -5 mol / L acridine orange solution dyeing, the specific dyeing method is: Weigh the wet slurry with a dry weight of 0.2g, put it into a 50mL glass bottle wrapped with tinfoil, add 40mL fluorescent dye solution to the glass bottle, add an appropriate amount of Cover the glass beads with a rubber stopper and shake even...

Embodiment 2

[0077] Take 60g of poplar P-RC APMP pulp produced by a certain factory and soak it in 1L of deionized water for 4 hours; the pulp after soaking is subjected to delamination treatment. The pulp after submergence is dissociated with a standard fiber dissociation machine, and the dissociated pulp is classified with a Bauer sieve using 30, 50, 100 and 200 mesh screens, and collected and sieved The pulp fiber of four fractions that obtains; Measure solid content after equalizing moisture, standby:;

[0078] Take an appropriate amount of P30 / R50 fraction poplar P-RC APMP pulp fibers obtained by the above screening and soak in deionized water for one week: use 6×10 5 mol / L acridine orange solution dyeing, the specific dyeing method is: Weigh the wet slurry with a dry weight of 0.2g, put it into a 50mL glass bottle wrapped with tinfoil, add 40mL fluorescent dye solution to the glass bottle, add an appropriate amount of Cover the glass beads with a rubber stopper and shake evenly for ...

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Abstract

The invention relates to a method for evaluating the interfiber bonded area of high-yield pulp with CLSM as a main tool. The method comprises the following main steps: with commercial high-yield pulp as a raw material, subjecting fibrous material of the pulp to soaking, latency elimination, screening and other early-stage pretreatment; then carrying out fluorescent dyeing on fibers and building a fiber bonding model by using related tools; scanning the fiber bonding model by using the optical sectioning technology of CLSM and accurately positioning the interfiber bonded area by regulating CLSM scanning parameters; and acquiring the focal plane image of the interfiber bonded area and calculating the actual area of the bonded area so as to evaluate the interfiber bonded area of the high-yield pulp. The method provided by the invention does not need the procedures of preparation of handsheets from the high-yield pulp and ultrathin slicing of the handsheets, is simple to operate, easy to implement and applicable to evaluation of the interfiber bonded area of all types of high-yield pulp, and has good adaptability.

Description

technical field [0001] The invention belongs to the field of pulping and papermaking, and relates to a measuring method in pulping and papermaking, in particular to a method for evaluating the bonding area between high-yield pulp fibers by using CLSM. Background technique [0002] The high-yield pulping process has gradually attracted attention due to its advantages such as lower fiber cost and environmental pollution load, and has developed very rapidly. Bleached chemical thermomechanical pulp (BCTMP), alkaline peroxide mechanical pulp (APMP) and mildly pretreated alkaline peroxide mechanical pulp (P-RC APMP) are collectively referred to as high Yield pulp (High-Yield Pulp, HYP for short). In recent years, high-quality high-yield pulp has been used to replace some hardwood kraft pulp due to its unique properties, and has been applied in a variety of high value-added paper grades. Compared with the corresponding bleached chemical pulp, high-yield pulp has higher bulk, opac...

Claims

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Application Information

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IPC IPC(8): G01N21/64G01N1/28G01N1/30
CPCG01N21/643G01N1/28G01N1/30G01N2001/302
Inventor 张红杰李海龙
Owner TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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