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Cellulose acetate foamed porous material and supercritical carbon dioxide auxiliary processing method thereof

A technology of cellulose acetate and cellulose diacetate, which is applied in the field of cellulose acetate foamed porous materials and supercritical carbon dioxide auxiliary processing, can solve the problems of environmental hazards, poor spinnability, and slow spinning speed, and achieve filtration efficiency Improvement, low price, wide application effect

Inactive Publication Date: 2015-06-17
何顺伦
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the spinning methods of CDA mainly include three technological routes: dry spinning, two-step wet spinning and one-step wet spinning, but there is acetone in the spinning process whether it is wet spinning or dry spinning , dichloromethane and other organic reagents, which are harmful to the environment; at the same time, there are disadvantages such as slow spinning speed and poor spinnability.

Method used

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  • Cellulose acetate foamed porous material and supercritical carbon dioxide auxiliary processing method thereof

Examples

Experimental program
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Effect test

Embodiment 1～5

[0045] A kind of cellulose acetate foaming porous material, its formula is as shown in table 1:

[0046] Table 1:

[0047] Example

[0048] Put cellulose acetate, plasticizer, stabilizer, lubricant, and adsorbent into a high-speed mixer according to the proportions in the above table and mix for 3 to 5 minutes, then add them to the hopper of the extruder for extrusion processing, and at the same time in the extruder The blowing agent supercritical carbon dioxide is injected into the injection port in proportion, and after being fully mixed by the foaming extruder, the foaming is extruded from the die and formed; the special extruder is a single-screw or parallel twin-screw with 5 heating zones The extruder has a static mixer with 5 to 8 sections at the output end of the extruder; the screw element is provided with a flight parallel to the thread direction; the metering section of the extruder is provided with an injection port for liquid carbon dioxide . The inject...

experiment example 1

[0053] Control group: 100 cigarettes were prepared using No. 1 shredded tobacco, cigarette paper, and ordinary cigarette filter rods from China Tobacco Anhui Co., Ltd.

[0054] Experimental groups 1 to 5: Cigarette filter rods prepared from No. 1 shredded tobacco and cigarette paper from China Tobacco Anhui Co., Ltd., and the cellulose acetate porous foam material prepared in Examples 1 to 5 of the present invention (prepared to be mixed with ordinary cellulose 100 cigarettes prepared by tow filter (with the same specifications);

[0055] Cigarette smoke analysis test: according to GB / T 19609-2004 "Determination of total particulate matter and tar by smoking machine for routine analysis of cigarettes" and GB / T 23356-2009 "Determination of carbon monoxide in gas phase of cigarette smoke by non-scattering infrared emission" Determination of total particulate matter (PTM), tar and carbon monoxide content in smoke, and determination of benzo(α)pyrene in mainstream smoke according ...

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Abstract

The invention relates to a cellulose acetate material, and in particular relates to a cellulose acetate foamed porous material and a supercritical fluid carbon dioxide auxiliary processing method thereof. The cellulose acetate foamed porous material comprises 90 to 99.5 parts by weight of cellulose acetate and 0.5 to 10 parts by weight of auxiliary agent and is prepared through a supercritical carbon dioxide fluid auxiliary extrusion processing method, and 0.5 to 5 parts by weight of supercritical carbon dioxide is added; and the auxiliary agent is selected from one or more of a plasticizer, a stabilizer, a lubricant, and an adsorbent. The invention also relates to a preparation method of the foamed porous material. The prepared cellulose acetate foamed porous material has the porosity of 70-85%, the Elongation at break of 2-5%, the compressive strength of 15-20Mpa and the tensile strength of 10-15MPa.

Description

technical field [0001] The invention relates to a cellulose acetate material, in particular to a cellulose acetate foamed porous material and a supercritical carbon dioxide auxiliary processing method thereof. Background technique [0002] Acetate fiber is a man-made fiber made from cellulose treated with acetic anhydride. According to the degree of esterification, the products include cellulose acetate (MCA), cellulose diacetate (CA) and cellulose triacetate (TCA) ), wherein the tow obtained from cellulose diacetate after spinning is recognized as the most ideal filter material and is the main raw material for producing cigarette filters in the world today. [0003] Cellulose diacetate (CDA) is widely used in tobacco tow textile fibers, thermoplastics and various film materials. At present, the spinning methods of CDA mainly include three technological routes: dry spinning, two-step wet spinning and one-step wet spinning, but there is acetone in the spinning process whethe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L1/12C08K13/02C08K5/11C08K5/524C08K3/34C08K3/04C08J9/12B29C47/92B29C48/92
CPCB29C48/92B29C48/875B29C2948/92704B29C2948/92895B29C2948/92904
Inventor 何顺伦何自富刘瑞
Owner 何顺伦
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