A method for enhancing the performance of waste paper pulp-based paper by using formaldehyde hemicellulose

A technology for hemicellulose and waste paper pulp, applied in the field of papermaking, can solve the problems of immature use methods, and achieve the effects of improving quality and efficiency, increasing output, and widening sources.

Active Publication Date: 2020-09-22
SOUTH CHINA UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, although the development and utilization of hemicellulose resources have been paid enough attention by researchers, their use is still not mature enough, resulting in the failure of this excellent renewable resource to fully exploit its value.

Method used

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  • A method for enhancing the performance of waste paper pulp-based paper by using formaldehyde hemicellulose
  • A method for enhancing the performance of waste paper pulp-based paper by using formaldehyde hemicellulose

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Experimental program
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Embodiment 1

[0021] A method of using hydroformylated hemicellulose to enhance the performance of waste paper pulp-based paper in this embodiment, the specific steps are as follows:

[0022] (1) Add 20mL of water, 0.66g of hemicellulose, 5% (w / v) sodium hydroxide in a 100mL round bottom flask, stir at 60°C for 0.5h; then add 0.1M hydrochloric acid to adjust the pH of the solution to 3 , adding glyoxal of 1, 2, 3, 4, and 5 times the mass of hemicellulose respectively, and reacting at 80°C for 4 hours to obtain hydroformylated hemicellulose.

[0023] (2) Mixing 1.2 g of waste paper pulp with an absolute dry weight and 0.012 g of the hydroformylated hemicellulose obtained in step (1), adding water to decompose, making paper, drying, and obtaining reinforced paper.

[0024] The infrared spectrograms of the hemicellulose of the present embodiment and the hemicellulose modified after adding different amounts of glyoxal are as follows: figure 1 shown. from figure 1 It can be seen that 3460cm ...

Embodiment 2

[0026] A method of using hydroformylated hemicellulose to enhance the performance of waste paper pulp-based paper in this embodiment, the specific steps are as follows:

[0027] (1) Add 20mL of water, 0.66g of hemicellulose, 5% (w / v) sodium hydroxide into a 100mL round bottom flask, stir at 60°C for 0.5h; then add acid to adjust the pH of the solution to 3, add 0.69mL of glyoxal was reacted at 80°C for 4h to obtain the hydroformylated hemicellulose.

[0028] (2) The waste paper pulp that the absolute dry mass is 1.2g is mixed with the obtained hydroformylated hemicellulose of step (1), so that the addition of the hydroformylated hemicellulose is 0%, 1%, and 2% of the dry mass of the waste paper pulp respectively. %, 3%, 4% and 5%, add water to decompose, make paper, dry, and get strengthened paper.

[0029] In this example, in the case of different addition amounts of hydroformylated hemicellulose, the comparison chart of the tensile properties of the obtained paper is as fol...

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Abstract

The invention belongs to the technical field of papermaking and discloses a method for reinforcing performance of waste paper pulp based paper with aldehydated hemicellulose. Water, hemicellulose andalkali are added to a reactor and stirred to react at 60 DEG C for 0.5 h, the pH value of the solution is adjusted to 3, an aldehyde compound is added, the mixture reacts at 60-100 DEG C for 0.5-5 h,and aldehydated hemicelluloses is obtained; then, waste paper pulp and the obtained aldehydated hemicellulose are mixed, water is added for defibering, the mixture is made into paper, drying is performed, and reinforced paper is obtained. The hemicelluloses and the waste paper pulp are taken as main materials, the hemicellulose is modified with aldehyde groups and used for reinforcing the mechanical performance of the waste paper pulp, a new idea is provided for utilization of the hemicellulose, and the method has practical significance in sustainable utilization of resources.

Description

technical field [0001] The invention belongs to the technical field of papermaking, and in particular relates to a method for enhancing the performance of waste paper pulp-based paper by adopting hydroformylated hemicellulose. Background technique [0002] With the rapid development of the economy and the improvement of people's living standards, the production and demand of paper are also increasing year by year, which may cause problems such as shortage of papermaking raw materials and energy shortage. Different from raw fiber raw materials, waste paper is a low-consumption, low-pollution renewable resource. The recycling of waste paper is not only conducive to circular economy, resource saving, and environmental protection production methods, but also conducive to improving the quality of economic growth. and benefits, building a conservation-oriented society, and major measures to alleviate the shortage of raw materials, water shortages, and serious sewage discharges in t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H17/24D21H21/18C08B37/14
CPCC08B37/00D21H17/24D21H21/18
Inventor 彭新文周秋生钟林新杜帆周静孙润仓
Owner SOUTH CHINA UNIV OF TECH
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