Polylactic acid/core-shell structure composite material and preparation method thereof

A composite material, polylactic acid technology, applied in the field of polylactic acid/core-shell composite material and its preparation, can solve the problems of high strength and modulus loss, little increase in toughness, poor weather resistance, etc., to save time and Cost, excellent mechanical properties, and the effect of reducing dependence

Inactive Publication Date: 2014-02-12
SHANGHAI ZAIHE IND INVESTMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For simple rubber or elastomer or polyester toughened polymers, although the impact toughness has been greatly improved, it is usually necessary to add 10~20 (wt)% rubber or elastomer or polyester, which often leads to the deterioration of the material. Too much loss of strength and modulus, polymers toughened by organic rigid particles, the toughness of the material does not increase much, and the toughening effect needs to be achieved under certain conditions
Although inorganic rigid particles can also achieve a strengthening effect while toughening the polymer matrix, this method also has some disadvantages: (1) Due to the characteristics of the inorganic filler itself, the low-temperature impact performance of the toughening system is still not ideal, It cannot meet the use requirements of some occasions, and the increase in toughness is

Method used

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  • Polylactic acid/core-shell structure composite material and preparation method thereof
  • Polylactic acid/core-shell structure composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] In this embodiment, the biodegradable high-toughness polylactic acid resin is composed of poly-L-lactic acid resin, PCL, antioxidant butyl hydroxyanisole, heat stabilizer triaryl phosphite, modifier maleic anhydride and calcium carbonate; In terms of weight fractions, the weight content of poly L-lactic acid is 75%, the weight content of PCL is 7.5%, the weight content of butyl hydroxyanisole is 5%, the weight content of triaryl phosphite is 5%, and the weight content of calcium carbonate is 5%. , The weight content of maleic anhydride is 2.5%.

[0044] The specific preparation method is as follows:

[0045] (1) Add 5g of calcium carbonate (5% by weight) and 7.5g of PCL (7.5% by weight) into the internal mixer according to the stated ratio and banbury at 150°C for 5 minutes to obtain calcium carbonate and PCL Form a "core-shell" structure masterbatch;

[0046] (2) According to the ratio, 75g of polylactic acid 101 resin (poly L-lactic acid) produced by Zhejiang Hisun ...

Embodiment 2

[0048] In this embodiment, the biodegradable high-toughness polylactic acid resin is made of poly-L-lactic acid resin, PCL, antistatic agent carbon black, 1250 mesh talcum powder and coupling agent isopropyl dioleic acid acyloxy (dioctyl phosphate acyloxy) Oxygen) titanate; according to the weight fraction, the weight content of poly L-lactic acid is 5%, the weight content of PCL is 80%, the weight content of carbon black is 5%, and the weight content of talcum powder is 10%;

[0049] Wherein the content of isopropyl dioleate acyloxy (dioctyl phosphate acyloxy) titanate in the talc powder is 1.5% of the mass of the talc powder.

[0050] Wherein the treatment steps of the inorganic material through the coupling agent are:

[0051] First add 20g of Nanjing Pinning Coupling Agent Co., Ltd. PN-102 brand titanate coupling agent (isopropyl dioleic acid acyloxy (dioctyl phosphate acyloxy) titanate) to 180g of acetone solution Make a solution in it, shake it well for later use, then ...

Embodiment 3

[0056] In this example, the biodegradable high-toughness polylactic acid resin is composed of poly-L-lactic acid resin, PBS, glycidyl methacrylate, montmorillonite and coupling agent (γ-aminopropylmethyltriethoxysilane) ; According to the weight fraction, the weight content of poly-L-lactic acid is 5%, the weight content of PBS is 35%, the weight content of PBSA is 40%, the weight content of glycidyl methacrylate is 5%, and the weight content of montmorillonite is 15%. ;

[0057] Wherein the content of γ-aminopropylmethyltriethoxysilane in the montmorillonite is 1% of the mass of the talcum powder.

[0058] Wherein the treatment steps of the inorganic material through the coupling agent are:

[0059] First add 20g of PN-902 silane coupling agent (γ-aminopropylmethyltriethoxysilane) from Nanjing Pinning Coupling Agent Co., Ltd. to 180g of aqueous solution to make a solution, shake well for later use, and then take 0.15 g was added to 10g of montmorillonite and stirred at a hi...

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Abstract

The invention belongs to the technical field of composite materials, and relates to a polylactic acid/core-shell structure composite material and a preparation method thereof. The polylactic acid/core-shell structure composite material is prepared from the following components in percentage by weight: 5-90% of polylactic acid, 5-80% of biodegradable polyester, 5-45% of inorganic filler, 0-5% of a processing agent, 0-40% of a flame retardant, 0-10% of an antistatic agent and 0-5% of a modifier. According to the invention, the biodegradable polyester is used to replace the traditional toughening compound system, so that the polylactic acid/core-shell structure composite material has the characteristics of high strength, high toughness, low cost, full biodegradation and the like.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and relates to a polylactic acid / core-shell structure composite material and a preparation method thereof. Background technique [0002] Polylactic acid is a thermoplastic aliphatic polyester that is artificially synthesized from crops such as corn and can eventually decompose into carbon dioxide and water in the environment. It does not rely on petroleum, and the entire production and processing process is more environmentally friendly and will not cause environmental pollution. Problems can be realized in the true sense of "originating from nature and returning to nature". Polylactic acid also has good biocompatibility and is one of the most promising biodegradable polymer materials. However, PLA is severely brittle, and its products have poor flexibility and low tear strength. These defects greatly limit its development and application. [0003] At present, the cost of polylactic...

Claims

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Application Information

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IPC IPC(8): C08L67/04C08L67/02C08L69/00C08L29/04C08L75/04C08K13/02C08K13/06C08J3/22
Inventor 侯连龙徐亚雷
Owner SHANGHAI ZAIHE IND INVESTMENT CO LTD
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