Biomass-based papermaking reinforcing agent prepared by taking agricultural residues as raw materials, and preparation method and application thereof

A paper-making strengthening agent and residue technology, which is applied in the field of biomass-based paper-making strengthening agents, can solve the problems of undiscovered patent publications and few high-value-added utilization methods, and achieve the improvement of ring compressive strength, tensile strength, The effect of improving the tear strength

Active Publication Date: 2021-12-24
TIANJIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The three major crops of corn, rice and wheat are the main sources of straw. People have done a lot of research on their utilization, and have produced effective methods such as the utilization of "five materials". However, for some agricultural residues with relatively small yields such as There are still few high value-added utilization methods of rice husks and corncobs, which prompt people to continue to explore. The present invention uses this type of biomass as a raw material to develop a natural, green and non-polluting papermaking enhancer, which will contribute to the sustainable development of the papermaking industry. of great significance
[0004] Through the search, no patent publication related to the patent application of the present invention has been found

Method used

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  • Biomass-based papermaking reinforcing agent prepared by taking agricultural residues as raw materials, and preparation method and application thereof
  • Biomass-based papermaking reinforcing agent prepared by taking agricultural residues as raw materials, and preparation method and application thereof
  • Biomass-based papermaking reinforcing agent prepared by taking agricultural residues as raw materials, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] The air-dried corncobs are crushed into particles with a diameter less than 10mm, mixed with water at a solid-to-liquid ratio of 1:5 (w / v), and then placed in a reactor for autocatalytic hydrolysis treatment. The reaction temperature and holding time are respectively 180°C and 30min. After the self-catalyzed hydrolysis finishes, the obtained material is concentrated to 20% concentration and then ground under the gap of 0.15mm disc mill. After coarse grinding, the obtained material was further diluted with water to a material with a concentration of 1 wt%, and treated for 1 h at a cellulase dosage of 1.5 FPU / g substrate, 50° C., and pH 5. After the enzyme treatment, the colloid mill was used to micronize the obtained material for 20 minutes, and finally a biomass-based paper-making strengthening agent was obtained. The optical microscope photos of it are as follows: figure 1 (a) shown.

[0055] The above-mentioned biomass-based papermaking strengthening agent was added...

Embodiment 2

[0060] The collected corn stalks are separated from the skin and core to obtain the core pith, mixed with water at a solid-to-liquid ratio of 1:6 (w / v), and then placed in a reactor to start autocatalytic hydrolysis. The reaction temperature and holding time are controlled separately At 175°C and 45min. After the self-catalyzed hydrolysis was completed, the obtained material was concentrated to a concentration of 30 wt%, and ground under a 0.15mm disc grinding gap. After the coarse grinding is finished, the obtained material is diluted with water to a material with a concentration of 3wt%, and is treated for 2 hours at a cellulase dosage of 0.6 FPU / g substrate, 50° C., and pH 5. After the enzyme treatment is finished, it is further diluted with water to a material with a concentration of 1wt%, and the resulting material is micronized for 30 minutes under the condition of 30MPa by a high-pressure homogenizer, and finally a biomass-based papermaking strengthening agent is obtain...

Embodiment 3

[0063] The bagasse produced in the sugar factory is semi-dry screened to obtain cane pith, mixed with water at a solid-to-liquid ratio of 1:10 (w / v), and then placed in a reactor to start autocatalytic hydrolysis, reaction temperature and holding time Controlled at 170°C and 60min respectively. After the self-catalyzed hydrolysis finishes, the gained material is concentrated to a concentration of 30wt%, and ground under a 0.20mm disc grinding gap. After coarse grinding, the obtained material was diluted with water to a concentration of 3 wt%, and treated for 2 hours at a cellulase dosage of 0.8 FPU / g substrate, 50° C., and pH 5. After the enzyme treatment is finished, it is further diluted with water to a material with a concentration of 1wt%, and the resulting material is micronized for 40 minutes by a high-pressure homogenizer under 60MPa conditions to finally obtain a biomass-based papermaking strengthening agent.

[0064] The above-mentioned biomass-based papermaking stre...

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Abstract

The invention discloses a biomass-based papermaking reinforcing agent prepared by taking agricultural residues as raw materials. A preparation method comprises the following steps: removing non-plant impurities in the agricultural residue raw materials, and treating the raw materials; carrying out autocatalytic hydrolysis treatment on agricultural residues obtained after material preparation to loosen the tissue structure of the raw materials; grinding a material obtained after autocatalysis treatment to enable the size of the material to reach a cellular level; carrying out biological enzyme treatment on the roughly ground material to further destroy the cell wall structure of the raw material; and carrying out micronization treatment on the material subjected to enzyme treatment to make cell walls microfibrillated so as to obtain a product that is the biomass-based reinforcing agent. In agricultural residues such as corncobs, rice husks, bagasse pith, sweet sorghum residue pith and corn straw pith, large-scale high-added-value utilization is not performed on most of the agricultural residues due to low fiber cell content, so that the problem of high-added-value conversion and utilization of the raw materials is solved, and a new way is provided for full utilization of the agricultural residues.

Description

technical field [0001] The invention belongs to the technical field of papermaking, in particular to a biomass-based papermaking reinforcing agent prepared from agricultural residues, a method and an application. Background technique [0002] As an important basic raw material industry, the paper industry occupies an important position in my country's national economy. The recycling of waste paper has a great influence on the performance of the paper produced. With the increase of the number of cycles, the irreversible keratinization of the fibers will increase, and the tightness of the paper produced will decrease, and the tensile strength, bursting strength, folding endurance and Indexes such as compressive strength continue to decline. High-yield pulp is also a commonly used pulp for papermaking at present. It has the advantages of less delignification, high yield, low cost, and environmental friendliness. Although paper made from high-yield pulp has higher opacity, Lig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H21/18D21H17/25D21C5/00
CPCD21H21/18D21H17/25D21C5/005
Inventor 王高升梁世杰于同金苗莹畅婉清朱勇于孟辉
Owner TIANJIN UNIV OF SCI & TECH
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