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 addin

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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