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Preparation method for pulp fiber-reinforced starch plastic

A pulp fiber and starch plastic technology, applied in the field of biodegradable plastics, can solve problems such as poor water resistance, insufficient strength, and limited application range

Inactive Publication Date: 2013-07-17
河南省南街村(集团)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its insufficient strength and poor water resistance limit its further application range. Studies have shown that adding reinforcements to form thermoplastic starch composite materials can improve their water resistance and mechanical properties.

Method used

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  • Preparation method for pulp fiber-reinforced starch plastic
  • Preparation method for pulp fiber-reinforced starch plastic

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The pulp fiber reinforced starch plastic is obtained according to the following method:

[0024] ① Cut 100 parts by weight of pulp fiberboard into small pieces, put it in a beaker, add 100 parts by weight of NaOH aqueous solution with a concentration of 15% by mass, moisten it for 0.5 hours, quickly add a little excess HCl to neutralize, and use No. 2 Sand core funnel suction filtration, then wash with distilled water until the pH is neutral, and dry;

[0025] ② Take another beaker, add 100 parts by weight of the above sample, and then add 100 parts by weight of 55% H 2 SO 4 Aqueous solution, heated up to 45°C, stirred at constant temperature, after 0.5h of reaction, filtered under reduced pressure, dried for later use;

[0026] ③ Add 5 parts by weight of the above-mentioned pulp fibers to 100 parts by weight of starch, and quickly mix them uniformly through a high-speed disperser, then add 15 parts by weight of a degradable plasticizer, and mix and disperse evenly ag...

Embodiment 2

[0028] The pulp fiber reinforced starch plastic is obtained according to the following method:

[0029] ① Cut 100 parts by weight of pulp fiberboard into small pieces, put it in a beaker, add 100 parts by weight of NaOH aqueous solution with a concentration of 20% by mass, wet it for 0.5 hours, quickly add a little excess HCl to neutralize, and use No. 2 Sand core funnel suction filtration, then wash with distilled water until the pH is neutral, and dry;

[0030] ② Take another beaker, add 100 parts by weight of the above sample, and then add 100 parts by weight of H with a concentration of 60% by mass. 2 SO 4 Aqueous solution, heated up to 50°C, stirred at constant temperature, after 0.5h of reaction, filtered under reduced pressure, dried for later use;

[0031] ③ Add 10 parts by weight of the above-mentioned pulp fibers to 100 parts by weight of starch, and quickly mix them uniformly through a high-speed disperser, then add 20 parts by weight of a degradable plasticizer, ...

Embodiment 3

[0033] The pulp fiber reinforced starch plastic is obtained according to the following method:

[0034] ① Cut 100 parts by weight of pulp fiberboard into small pieces, put it in a beaker, add 100 parts by weight of NaOH aqueous solution with a concentration of 25% by mass, wet it for 0.5 hours, quickly add a little excess HCl to neutralize, and use No. 2 Sand core funnel suction filtration, then wash with distilled water until the pH is neutral, and dry;

[0035] ② Take another beaker, add 100 parts by weight of the above sample, and then add 100 parts by weight of H with a concentration of 65% by mass. 2 SO 4 Aqueous solution, heated up to 55°C, stirred at constant temperature, after 0.5h of reaction, filtered under reduced pressure, dried for later use;

[0036] ③ Add 15 parts by weight of the above-mentioned pulp fibers to 100 parts by weight of starch, and quickly mix them uniformly through a high-speed disperser, then add 25 parts by weight of a degradable plasticizer, ...

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Abstract

The invention discloses a preparation method for a pulp fiber-reinforced fully-degradable starch plastic. According to the invention, a broad-leaved wood or coniferous wood pulp fiberboard for the paper-making industry is mainly used and two-step pretreatment is carried out so as to obtain pulp fiber of a certain scale; the pulp fiber is further mixed with starch and a degradable plasticizer, and then the pulp fiber-reinforced starch plastic is prepared through plasticizing by a double screw extruder. The prepared pulp fiber-reinforced starch plastic has the advantages of obviously improved mechanical properties, complete degradation, low cost, a simple preparation process and the like and can be extensively used for preparation of a variety of fully-degradable starch plastic products.

Description

technical field [0001] The invention relates to a preparation method of pulp fiber reinforced starch plastic, which belongs to the field of biodegradable plastics. Background technique [0002] Starch plastics, also known as starch-based plastics, generally refer to plastics whose composition contains starch or its derivatives. Starch plastics are mainly divided into four categories: (1) Filling type, the amount of starch added is 10-30%; (2) Photo / biological dual degradation type, on the basis of the former, photosensitizers are added to accelerate the decomposition of plastics; (3) ) Blending type, which is made of starch and synthetic resin or other natural polymers, with a starch content of 30-60%; (4) Whole starch type, with a starch content of more than 90%, usually through the addition of plasticizers Or other methods, the starch molecular chains are disordered, thus becoming thermoplastic starch plastic (Thermoplastic Starch, referred to as TPS). [0003] As a degr...

Claims

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Application Information

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IPC IPC(8): C08L3/02C08K5/053C08K5/06C08J5/06
Inventor 李盘欣郭斌唐皞姜海天黄亚男史咏华彭丽王培英
Owner 河南省南街村(集团)有限公司
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