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Cellulose/polylactic acid fiber composite paper and preparation method thereof

A polylactic acid fiber, polylactic acid short fiber technology, applied in the direction of organic non-cellulose fiber, natural cellulose pulp/paper, fiber treatment, etc., can solve the problem of composite paper tensile index and tear index need to be improved, polylactic acid fiber Poor effect, long time and other problems, to achieve the effect of expanding the source of raw materials, reducing processing costs and processing time, and reducing preparation costs

Active Publication Date: 2022-05-13
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its disadvantages are: the surface of polylactic acid fiber is smooth and has good hydrophobic properties, the treatment of polylactic acid fiber by free beating method has poor effect, high energy consumption, long time and high cost, and the tensile index and tear index of the obtained composite paper are still waiting promote

Method used

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  • Cellulose/polylactic acid fiber composite paper and preparation method thereof
  • Cellulose/polylactic acid fiber composite paper and preparation method thereof

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preparation example Construction

[0029] Described cellulose / polylactic acid fiber composite paper preparation method specifically comprises the following steps:

[0030] (1) The polylactic acid fiber is mechanically sheared, and the polylactic acid fiber is processed into a short fiber with a length of 0.5-2.0mm, and the polylactic acid short fiber is obtained after cleaning and drying with deionized water;

[0031] (2) The short polylactic acid fibers were soaked in absolute ethanol at room temperature for 3 hours, and then washed with water and absolute ethanol to remove impurities and pollutants. Subsequently, it is treated with 0.5% to 3.0% (w%) NaOH solution for 1 hour, and then the short polylactic acid fibers are repeatedly washed with deionized water until the washing liquid is neutral, and the modified short polylactic acid fibers are obtained after drying;

[0032] (3) Soak the natural plant fiber pulp board with deionized water for 24h, then fully decompose it with a fiber disintegrating machine (r...

Embodiment 1

[0037] (1) Cut the polylactic acid fibers on a low-speed disperser, process the polylactic acid fibers into short fibers with a length of 0.5-2.0 mm, wash with deionized water, and dry to obtain short polylactic acid fibers;

[0038] (2) Soak the shortened polylactic acid short fibers in absolute ethanol for 3 hours at room temperature, and then wash with water and absolute ethanol to remove impurities and pollutants. Then it was treated with 0.5% (w%) NaOH solution for 1h to obtain modified polylactic acid short fibers;

[0039] (3) Soak the bleached broad-leaved wood pulp board with deionized water for 24 hours, then fully decompose it with a fiber disintegrator (running at 15,000 rpm), and then pressurize the natural plant fiber pulp board in a trough beater with a beating concentration of 2% ( Hang 1kg weight) beating, beating degree is 35 ° SR, obtains cellulose pulp;

[0040] (4) The auxiliary agent sodium carboxymethyl cellulose is prepared into an auxiliary agent solu...

Embodiment 2

[0043] (1) Cut the polylactic acid fibers on a low-speed disperser, process the polylactic acid fibers into short fibers with a length of 0.5-2.0 mm, wash with deionized water, and dry to obtain short polylactic acid fibers;

[0044] (2) Soak the shortened polylactic acid short fibers in absolute ethanol for 3 hours at room temperature, and then wash with water and absolute ethanol to remove impurities and pollutants. Then it was treated with 1.0% (w%) NaOH solution for 1h to obtain modified polylactic acid short fibers;

[0045] (3) Soak the bleached hardwood pulp board and the bleached softwood pulp board with deionized water for 24 hours respectively, and then fully decompose it with a fiber disintegrating machine (running at 15000 rpm), and then the natural plant fiber pulp board is placed in the tank with a beating concentration of 2%. Pressurize (hang a 1kg weight) in a type beater to beat the pulp, and the beating degree is 40 ° SR, and then the bleached hardwood pulp a...

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Abstract

The invention provides cellulose / polylactic acid fiber composite paper and a preparation method thereof, and the preparation method comprises the following steps: (1) cutting polylactic acid fibers into short fibers, cleaning and drying to obtain polylactic acid short fibers; (2) soaking and cleaning polylactic acid short fibers with absolute ethyl alcohol, performing alkali etching treatment with a 0.5%-3.0% strong alkali solution, washing until the washing liquid is neutral after the alkali etching treatment is completed, and drying to obtain modified polylactic acid short fibers; (3) soaking and defibering the natural plant fiber pulp board with water, and then pulping to obtain plant fiber pulp; (4) preparing an auxiliary agent into an auxiliary agent solution; and (5) mixing, defibering and dispersing the modified polylactic acid short fibers, the plant fiber pulp and an auxiliary solution to obtain mixed pulp, performing papermaking by adopting a wet forming technology, and performing squeezing and drying to obtain the cellulose / polylactic acid fiber composite paper. The tensile index and the tearing index of the composite paper are improved, and the treatment cost and the processing time of the polylactic acid fibers are reduced.

Description

technical field [0001] The invention relates to the field of preparation of special paper, in particular to a cellulose / polylactic acid fiber composite paper and a preparation method thereof. Background technique [0002] Polylactic acid (PLA) is a polyester polymer with excellent biodegradability. It can be formed by polycondensation of lactic acid or ring-opening polymerization of lactide, so it is also called polylactide. Polylactic acid can be fermented into lactic acid from corn, wheat, cassava, sugar beet and other crops and organic waste, and then polymerized by lactic acid. After spinning, polylactic acid can be formed into polylactic acid fiber. Because corn is mostly used as raw material, it is also called "corn fiber". The raw materials of polylactic acid fiber come from nature, because its products can be completely degraded into H in nature. 2 O and CO 2 , does not produce other waste materials, thus realizing a complete natural cycle, and has become a promi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H13/30D21H15/02D21H11/00D21H17/32D21H17/24D21H17/26D06M11/38D06M101/32
CPCD21H13/30D21H15/02D21H11/00D21H17/32D21H17/24D21H17/26D06M11/38D06M2101/32Y02W30/64
Inventor 蒋学孙策田秀枝陈婷张美云
Owner SHAANXI UNIV OF SCI & TECH
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