Paper prepared from wastes of agriculture and forestry and preparation method for paper

A technology of agricultural and forestry waste and paper, applied in the field of pulp and paper making, can solve the problems of reducing the kappa value of pulp and low pulping yield, and achieve the promotion of decomposition and chemical bond breaking, high fiber yield, and good hygienic properties Effect

Inactive Publication Date: 2018-06-08
HUNAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The method can not only solve the problem of low pulping yield, but also effectively reduce the kappa value of the pulp, and the p

Method used

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  • Paper prepared from wastes of agriculture and forestry and preparation method for paper

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Embodiment 1

[0030] This embodiment provides a method for preparing agricultural and forestry waste paper, and the specific operation steps are as follows:

[0031] S1. Deslagging the agricultural and forestry wastes, removing the silt and dust therein, drying until the water content is 20%, placing the above-mentioned agricultural and forestry wastes in a pre-steaming bin for steaming treatment, the steaming temperature is 70°C, The time is 30min, then carry out screw extrusion processing, the compression ratio of screw extrusion processing is 1:1, obtains coarse slurry;

[0032] S2. Repeatedly soak, disperse and wash the coarse slurry obtained in step S1 with water until the washing water is neutral, then send it to a high-consistency disc refiner for normal pressure refining, the refining concentration is 25%, and the temperature is 80°C , the time is 3 hours, the pulp after refining is put into the delatency washing, the delatency temperature is 70 ℃, and the time is 2 hours, so that t...

Embodiment 2

[0038] This embodiment provides a method for preparing agricultural and forestry waste paper, and the specific operation steps are as follows:

[0039] S1. Deslagging the agricultural and forestry wastes, removing the silt and dust therein, drying until the water content is 30%, placing the above-mentioned agricultural and forestry wastes in a pre-steaming bin for steaming treatment, the steaming temperature is 80°C, The time is 20min, then carry out screw extrusion processing, the compression ratio of screw extrusion processing is 2:1, obtains coarse slurry;

[0040] S2. Repeatedly immerse, disperse and wash the coarse slurry obtained in step S1 with water until the washing water is neutral, then send it to a high-consistency disc refiner for normal pressure refining, the refining concentration is 30%, and the temperature is 70°C , the time is 4h, the pulp after refining is put into the delatency washing, the delatency temperature is 80°C, and the time is 1h, so that the fibe...

Embodiment 3

[0046] This embodiment provides a method for preparing agricultural and forestry waste paper, and the specific operation steps are as follows:

[0047]S1. Deslagging the agricultural and forestry wastes, removing the silt and dust therein, drying until the water content is 25%, putting the above-mentioned agricultural and forestry wastes into the pre-steaming bin for steaming treatment, the steaming temperature is 72°C, The time is 24min, then carry out screw extrusion processing, the compression ratio of screw extrusion processing is 1.5:1, obtains coarse slurry;

[0048] S2. Repeatedly immerse, disperse and wash the coarse slurry obtained in step S1 with water until the washing water is neutral, then send it to a high-consistency disc refiner for normal pressure refining, the refining concentration is 26%, and the temperature is 75°C , the time is 3.5h, put the pulp after refining into the delatency washing, the delatency temperature is 72°C, and the time is 1.5h, so that th...

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Abstract

The invention relates to paper prepared from wastes of agriculture and forestry and a preparation method for the paper. A disclosed process for preparing fibers from the wastes of agriculture and forestry comprises the procedures of steaming treatment, screw extrusion, mechanical pulping, graphene dispersion solution modifying and the like. According to the method, the wastes of agriculture and forestry serve as a raw material for preparing the fibers, and screw extrusion and mechanical pulping are combined, so that the fibers prepared by the method are high in yield and low in Kappa number; and no harmful chemical is introduced in the entire process, so that the hygienic characteristic of the fibers is ensured. Due to a graphene dispersion solution added during pulping, the obtained product has relatively good conductive function and antibacterial performance and particularly plays a role in effectively inhibiting and killing staphylococcus aureus, escherichia coli and streptococcus hemolyticus.

Description

technical field [0001] The invention belongs to the technical field of pulping and papermaking, and in particular relates to an agricultural and forestry waste paper and a preparation method thereof. Background technique [0002] Graphene is a new type of two-dimensional ultra-thin nanomaterial, because of its unique structure, mechanical and electronic properties, it has broad application prospects in the field of bio-nanotechnology such as drug delivery and tumor treatment. Studies have shown that graphene can not only cut the bacterial cell membrane, but also induce the detachment of phospholipid molecules on the bacterial cell membrane, so as to realize the large-scale direct extraction of phospholipid molecules on the cell membrane by graphene. The physical action of cutting and extracting can cause the bacterial cell membrane to lose its integrity and the intracellular material to flow out, thereby achieving the effect of killing the bacteria. At the same time, graphe...

Claims

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Application Information

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IPC IPC(8): D21H15/10D21H11/12D21C5/00D21H17/67D21H17/00D21H17/06D21H17/37D21H19/10D21H21/18D21H21/36
CPCD21H15/10D21C5/00D21H11/12D21H17/00D21H17/06D21H17/37D21H17/675D21H19/10D21H21/18D21H21/36
Inventor 贾炯李红
Owner HUNAN UNIV OF TECH
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