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Method for manufacturing grafted starch nano composite material

A technology of nano-composite material and grafted starch, which is applied in the field of composite material manufacturing and processing to achieve the effect of mild reaction conditions

Inactive Publication Date: 2010-02-10
SOUTH CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no report on the use of polymer intercalation in situ composite technology in the graft modification of polymer materials.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Reactive monomer methyl acrylate 20g, grafting initiator cerium ammonium nitrate 0.05g, organic nanofiller (a layered nanofiller treated with cationic surfactant, the same below) (Cloiste 10A) 2g uniformly mixed in advance Finally, mix it with 500g of dispersion medium water and 0.5g of emulsifier sodium lauryl sulfate, and finally add 80g of ordinary cornstarch, mix well, and heat up to 40°C for 10 hours under nitrogen protection. After the reaction, centrifuge Remove moisture, wash with water three times, and dry under vacuum at 40°C to obtain the product grafted starch nanocomposite material. The obtained product was determined by X-ray diffraction to measure the insertion of nanofillers. The results are shown in Table 1.

Embodiment 2

[0035] Reactive monomer methyl acrylate oligomer (polymerization degree 3-4) 20g, grafting initiator cerium ammonium nitrate 0.05g, organic nano-filler (Cloiste 10A) 2g first uniformly mixed, and then with the dispersion medium deionized water 500g, mixed with 0.5g of emulsifier sodium lauryl sulfate, finally added 80g of ordinary cornstarch, mixed evenly, under the protection of nitrogen, heated up to 40°C for 10 hours of reaction, after the reaction, centrifuged to remove water, washed three times with water, Vacuum-dried at 40° C. to obtain grafted starch nanocomposites, and X-ray diffraction was used to measure the insertion of nanofillers in the obtained product. The results are shown in Table 1.

Embodiment 3

[0037] Reactive monomer butyl acrylate 90g, organic nano filler (Cloiste 10A) 0.6g, dispersion medium deionized water 1500g, emulsifier sodium lauryl sulfate 1.0g, and pre-irradiation absorbed dose 10kGy, after irradiation for 10min 80g of ordinary cornstarch, mixed together evenly, under the protection of nitrogen, heated up to 40 ℃ for 10 hours of reaction, after the reaction, centrifuged to remove water, washed three times, vacuum dried at 40 ℃ to obtain the product grafted starch nanometer Composite material, the resulting product was measured by X-diffraction to insert the nanofiller, the results are shown in Table 1.

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PUM

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Abstract

The invention discloses a preparation method of grafted starch nano-composite, which is characterized in that the nano-filling and the grafted agent are mixed before the grafted reaction ending. The nano-filling goes through intercalation or stripping during the grafted process, namely the nano-filling is first mixed with the macromolecular material starch and then with the grafted agent or firstmixed with the grafted agent and then with the starch. Or the nano-filling, the starch and the grafted agent are mixed together and then go through the grafted reaction under the grafted agent to obtain the grafted starch nano-composite. Due that the nano-filling is mixed with the grafted agent before the grafted reaction ending, the grafted agent with small molecular weight is easy to extend intothe crystal layer of the nano-filling, which accelerates to form the nano-composite in intercalation state and stripping state and improves the combination property of the material.

Description

technical field [0001] The invention relates to the field of composite material manufacturing and processing, in particular to a method for manufacturing a grafted starch nanocomposite material. Background technique [0002] Polymer materials have played an important role in the development of human beings. With the deepening of research, it is found that it is more and more difficult to meet people's needs for new functions by studying materials with new structures. Therefore, more and more attention has been paid to the physical and chemical modification of existing materials. Nanocomposite technology and graft modification technology are two main physical and chemical modification methods in the field of polymer materials. [0003] Polymer nanocomposite material refers to a new type of composite material that is composited with other materials with nanometer dimensions and polymer materials in various ways. In a broad sense, a polymer nanocomposite can be regarded as a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F251/00C08F2/44C08K9/04
Inventor 周家华宋贤良范小平杨公明
Owner SOUTH CHINA AGRI UNIV