Full biodegrade straw sucker and preparation method thereof

An all-biological, straw-based technology, applied in the field of all-biodegradable straw straws and its preparation, can solve the problems of complex preparation process, non-degradable straws, incomplete degradation, etc., and achieve the effects of simple preparation process, safe use, and avoiding waste

Active Publication Date: 2019-05-10
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a fully biodegradable straw straw and its preparation method to solve th

Method used

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  • Full biodegrade straw sucker and preparation method thereof
  • Full biodegrade straw sucker and preparation method thereof
  • Full biodegrade straw sucker and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The preparation method of the fully biodegradable straw straw of this embodiment includes:

[0029] (1) Straw pretreatment

[0030] The harvested straws are air-dried, and after drying, the straws are de-knotted to leave a tubular part. The obtained straw tube is subjected to lignin removal and bleaching, and the straw tube is soaked in a mixed aqueous solution of glacial acetic acid and sodium chlorite with a molar ratio of 1.5:1 until the straw tube turns white. Then wash with distilled water until the filtrate is neutral, and then dry the straw tube at 105°C to a constant weight.

[0031] (2) Preparation of straw tube

[0032] Soak the pretreated straw tube in a cellulose solution with a concentration of 5wt% for 1 hour, then take it out to condense in the air for 3.5 hours to form a cellulose colloid on the surface of the straw tube, and then place the straw tube in distilled water for 4 days. The solvent is air-dried to obtain a straw straw. Among them, the cellulose so...

Embodiment 2

[0036] The preparation method of the fully biodegradable straw straw of this embodiment includes:

[0037] (1) Straw pretreatment

[0038] The harvested straws are air-dried, and after drying, the straws are de-knotted to leave a tubular part. The obtained straw tube is subjected to lignin removal and bleaching, and the straw tube is soaked in a mixed aqueous solution of glacial acetic acid and sodium chlorite with a molar ratio of 1.2:1 until the straw tube turns white. Then wash with distilled water until the filtrate is neutral, and then dry the straw tube at 90°C to a constant weight.

[0039] (2) Preparation of straw tube

[0040] Soak the pretreated straw tube in a cellulose solution with a concentration of 1wt% for 0.5h, then take it out to condense in the air for 2.5h to form a cellulose colloid on the surface of the straw tube, and place the straw tube in distilled water for 2 days The solvent is exchanged, and the straw straw is obtained after natural air drying. Among th...

Embodiment 3

[0044] The preparation method of the fully biodegradable straw straw of this embodiment includes:

[0045] (1) Straw pretreatment

[0046] The harvested straws are air-dried, and after drying, the straws are de-knotted to leave a tubular part. The obtained straw tube is subjected to lignin removal and bleaching, and the straw tube is soaked in a mixed aqueous solution of glacial acetic acid and sodium chlorite with a molar ratio of 1.4:1 until the straw tube turns white. Then wash with distilled water until the filtrate is neutral, and then dry the straw tube at 100°C to a constant weight.

[0047] (2) Preparation of straw tube

[0048] Soak the pretreated straw tube in a cellulose solution with a concentration of 3wt% for 45 minutes, then take it out to condense in the air for 3 hours to form a cellulose colloid on the surface of the straw tube, and then place the straw tube in distilled water for 3 days to exchange the solvent , And get straw straws after natural air drying. Amon...

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Abstract

The invention discloses a full biodegrade straw sucker and a preparation method thereof, and belongs to the technical field of sucker preparation. A pretreated straw tube is soaked in cellulose solution, taken out and gelated in air to form a cellulose colloidal film on the surface of the straw tube, the straw tube is placed into distilled water to perform solvent exchange, and the straw tube is naturally air-dried to obtain the straw sucker. The straw sucker is connected by a connecting component prepared by 3D (three-dimensional) printing to obtain the full biodegrade straw sucker. The cellulose solution comprises natural cellulose pulp and mixed solvents for dissolving the natural cellulose pulp, wherein the mixed solvents comprise dimethyl sulfoxide, tetrabutyl ammonium hydroxide and water. The sucker is simple in preparation process and safe to use, can be fully degraded and cannot pollute environments.

Description

Technical field [0001] The invention relates to the technical field of straw preparation, in particular to a fully biodegradable straw straw and a preparation method thereof. Background technique [0002] Existing disposable straws are generally made of food-grade PP (polypropylene). This straw material has stable properties and is not easily degraded. Due to its small size, light weight, and relatively dispersed distribution, the straws are not easy to be recycled, resulting in environmental pollution and even Many plastic straws will enter the ocean and be eaten by marine life and cause harm. In addition, some additives are added to the plastic straw during the production process, which will cause it to contain heavy metals or residues of plasticizer, which is not conducive to environmental protection. [0003] It is necessary to develop a straw that is completely biodegradable and safe to use. Some degradable beverage straws currently appearing are produced with straw, glutino...

Claims

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Application Information

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IPC IPC(8): C08J7/12C08L97/02
Inventor 姜曼杨智杰周祚万韦炜张义珊黄涛吴昭辉
Owner SOUTHWEST JIAOTONG UNIV
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