Composite, polylactic acid composite material, preparation method and application

A composite material and composite technology, applied in the field of composites and their preparation, can solve the problems of poor improvement effect of the toughness of biodegradable materials and the like

Active Publication Date: 2021-09-14
BAOTOU RES INST OF RARE EARTHS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The biodegradable material improves the thermal stability of the composite material by using the double isolation of silicic acid in the coated particles and inorganic nanoparticles, and the nano-oxide is coated on the outer layer, which has a poor effect on improving the toughness of the biodegradable material.

Method used

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  • Composite, polylactic acid composite material, preparation method and application

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preparation example Construction

[0027]

[0028] The preparation method of the compound of the present invention comprises the following steps: (1) the step of preparing the surface-activated rare earth oxide; (2) the step of preparing the degradable polyester; (3) the step of preparing the compound. Details are given below.

[0029] Steps for preparing surface-activated rare earth oxides

[0030] The rare earth oxide is reacted with a coupling agent to obtain a surface activated rare earth oxide.

[0031] The rare earth oxide of the present invention can be lanthanum oxide, cerium oxide, praseodymium oxide, neodymium oxide, promethium oxide, samarium oxide, europium oxide, gadolinium oxide, terbium oxide, dysprosium oxide, holmium oxide, erbium oxide, thulium oxide, ytterbium oxide, One or more of lutetium oxide and yttrium oxide; preferably one or more of lanthanum oxide, cerium oxide, and samarium oxide; more preferably one of lanthanum oxide or cerium oxide. This can improve the strengthening and tou...

Embodiment 1

[0076] (1) The silane coupling agent KH550 is prepared into a coupling agent aqueous solution with a concentration of 10wt%, and the pH of the coupling agent aqueous solution is adjusted to 5 with acetic acid, and then the coupling agent aqueous solution is added to lanthanum oxide (rare earth oxide) in the form of a spray. In the material), the amount of coupling agent is controlled to be 1wt% of the mass of lanthanum oxide (rare earth oxide); use a high-speed mixer to mix lanthanum oxide (rare earth oxide) and coupling agent aqueous solution, and place it at 25°C for 0.5h, Then react in an oven at 55° C. for 4 hours; dry the reaction product at 100° C. to obtain a surface-activated rare earth oxide.

[0077](2) Form a mixture of succinic acid, sebacic acid, itaconic acid, butylene glycol, tetrabutyl titanate, and p-hydroxyanisole; wherein, the molar ratio of dibasic alcohol to dibasic acid is 1.05:1 , the consumption of catalyst is 0.5wt% of the total amount of dibasic acid ...

Embodiment 2

[0081] All the other are with embodiment 1 except following conditions:

[0082] The rare earth oxide is cerium oxide. The properties of the obtained polylactic acid composite materials are shown in Table 1.

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Abstract

The invention discloses a composite, its preparation method and application. The preparation method of the composite comprises the following steps: (1) reacting the rare earth oxide with a coupling agent to obtain a surface-activated rare earth oxide; (2) performing a polymerization reaction of a dibasic acid and a dibasic alcohol to obtain a polyester, The polyester is recrystallized by a mixed solvent method to obtain a degradable polyester; (3) the surface-activated rare earth oxide and the degradable polyester are melted and kneaded, and then extruded to obtain a compound. The compound obtained by the method can improve the strength and toughness of the polylactic acid. The invention also provides a polylactic acid composite material and a preparation method thereof. The raw materials of the polylactic acid composite material include: 70-90wt% of polylactic acid, 10-30wt% of the compound and 1-5wt% of compatibilizer. The polylactic acid composite material has good strength and toughness.

Description

technical field [0001] The present invention relates to a compound and its preparation method and use, and also relates to a polylactic acid composite material and its preparation method and use. Background technique [0002] Polylactic acid (PLA) is a new type of bio-based biodegradable material. In the current situation of scarcity of petroleum resources and serious white pollution, polylactic acid (PLA) has become the most potential substitute for petroleum-based plastics. PLA is compostable and biodegradable, while having good biocompatibility. PLA has a wide range of applications, and can be used to prepare sheets, films, fibers, etc., and it can be used in various fields. [0003] Polylactic acid (PLA) has a helical molecular chain. There is only one methine group in the repeating unit of the main chain, and there is no flexible methylene group. The mobility of the polylactic acid molecular chain is poor. In addition, the glass transition temperature (Tg) of polylac...

Claims

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Application Information

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IPC IPC(8): C09C1/00C09C3/12C09C3/10C08L67/04C08K9/10C08K9/06C08K3/22C08G63/52C08G63/78
CPCC08G63/52C08G63/78C08K3/22C08K9/06C08K9/10C08K2003/221C08K2003/2213C08L2201/06C09C1/00C09C3/006C09C3/10C09C3/12C08L67/04
Inventor 曹露雅曹鸿璋王慧李波于晓丽芦婷婷周晓东葛瑞祥陈明光吴豪白雪田虎虎郭立影孟志军申孟林张光睿宋静
Owner BAOTOU RES INST OF RARE EARTHS
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