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Aminated starch-based nanocomposite and preparation method thereof

A nanocomposite material and starch nanotechnology are applied in the field of aminated starch-based nanocomposite materials and their preparation, which can solve the problems of weak interaction between starch and polymer matrix, affecting the reinforcement effect, and difficulty in starch dispersion, and achieve excellent mechanical properties. Performance and environmental friendliness, effect of improved dispersion, simplified preparation process

Active Publication Date: 2016-07-06
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the particle size of natural starch is usually more than tens of microns, the molecular hydrophilicity is strong, and the intramolecular and intermolecular hydrogen bond forces are strong, which makes it difficult for starch to disperse in the polymer matrix, and starch and polymer matrix (such as rubber) Weak force between
It can be seen that starch is mainly used as an inert filler in the rubber matrix, which seriously affects its reinforcing effect

Method used

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  • Aminated starch-based nanocomposite and preparation method thereof
  • Aminated starch-based nanocomposite and preparation method thereof
  • Aminated starch-based nanocomposite and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Preparation of Aminated Starch Nanoparticles

[0052] First, 900mL dimethyl sulfoxide, 100mL water and 10mL N-β-(aminoethyl)-γ-aminopropylmethyldimethoxysilane (chemical structure: NH 2 CH 2 CH 2 NHCH 2 CH 2 CH 2 SiCH 3 (OCH 3 ) 2 ) mixed, stirred at room temperature at 500rpm for 15min and then warmed up to 90°C, 10g of natural tapioca starch was weighed and dispersed therein, stirred at 800rpm, heated in a water bath for 60min to form a clear and transparent starch solution, cooled to room temperature; 5L of ethanol with a mass concentration of 99.7% was gradually Add it dropwise into the above starch solution, stir continuously at a stirring rate of 750rpm to obtain an aminated nano-starch suspension; subject the suspension to ultrasonic treatment for 60 minutes, centrifuge it and wash it with ethanol for 3 times, and dry it at 90°C for 48 hours. Aminated nano starch particles are obtained.

[0053] The morphology and chemical structure of aminated starch na...

Embodiment 2

[0058] Preparation of Aminated Starch Nanoparticles

[0059] Mix 900mL dimethylsulfoxide, 100mL water and 10mL 3-aminopropyltriethoxysilane (chemical structure: NH 2 CH 2 CH 2 CH 2 Si(OC 2 h 5 ) 3 ) and mix, stir at 500rpm at room temperature for 15min and then heat up to 95°C, weigh 10g of natural potato starch and disperse it, stir at 800rpm, heat in a water bath for 90min to form a clear and transparent starch solution, and cool to room temperature; dilute 6L with 1.25g of Span 80 and The ethanol solution of 3.75g Tween 80 (mass concentration is 99%) is dripped into above-mentioned starch solution dropwise, constantly stirs, and speed 750rpm obtains the nano-starch suspension of amination; The suspension is carried out sonication 60min, It was centrifuged, washed with ethanol three times, and dried at 90° C. for 48 hours to obtain aminated nano-starch particles.

[0060] The morphology and chemical structure of aminated starch nanoparticles were characterized by dyna...

Embodiment 3

[0062] Mix 800mL dimethyl sulfoxide, 120mL water and 10g glycine (chemical structure: NH 2 CH 2 COOH) mixed, stirred at 500rpm at room temperature for 15min and then heated to 95°C, weighed 10g of tapioca starch and 0.05g of stannous octoate and dispersed them, stirred at 800rpm, heated in a water bath for 180min to form a clear and transparent starch solution, cooled to room temperature; 6L of ethanol solution (mass concentration is 99%) drip into above-mentioned starch solution dropwise, constantly stir, speed 750rpm, obtain the nano-starch suspension of amination; The suspension is carried out sonication 60min, it is centrifuged and washed with ethanol for 3 Once, dry at 90°C for 48 hours to obtain aminated nano-starch particles.

[0063] The morphology and chemical structure of aminated starch nanoparticles were characterized by dynamic light scattering and degree of substitution formula, respectively. The results are as follows: the particle size is 120±10nm, the polydi...

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Abstract

The invention discloses an aminated starch-based nanocomposite and a preparation method thereof. The aminated starch-based nanocomposite comprises the following components in parts by weight: 100 parts of epoxidized polymer, 2-40 parts of aminated starch nanoparticles, 0-3 parts of auxiliary crosslinking agent and 3-25 parts of polymer processing aid, wherein the structural general formula of starch in the aminated starch nanoparticles is St-R0CH(R1)-R2. In the invention, through the combination of the aminated starch nanoparticles and the epoxidized polymer, the nano reinforcing effect of the starch nanoparticles on the polymer is remarkably embodied, and the polymer material is endowed with the green and environment-friendly features; and moreover, the aminated starch nanoparticles serve as a crosslinking agent in the epoxidized polymer. The aminated starch-based nanocomposite disclosed by the invention is easy to prepare and excellent in property and can be applied to various products such as rubber, plastics and adhesives.

Description

technical field [0001] The invention relates to the technical field of nanocomposite materials, in particular to an aminated starch-based nanocomposite material and a preparation method thereof. Background technique [0002] Nanostarch has many advantages such as wide source, renewable, non-toxic, biodegradable, good biocompatibility and nanoparticle effect, and has important potential application value in nanocomposite materials, biomedicine, light industry, chemical industry and other fields. It is one of the research hotspots in the field of nanotechnology. [0003] Rubber materials, such as ethylene vinyl acetate rubber and natural rubber, need to be reinforced in order to exert greater application value. Traditional rubber reinforcing agents mainly include carbon black and silica. The preparation process of these two types of reinforcing agents requires high energy consumption and is not conducive to environmental protection. Native starch as an environmentally friend...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/26C08L15/00C08L3/04C08L3/02C08J3/24
CPCC08J3/246C08J2315/00C08J2323/26C08J2403/02C08J2403/04C08L15/00C08L23/26C08L3/04C08L3/02
Inventor 马丕明赵喜元蔡晓霞余鳗漫东为富陈明清
Owner JIANGNAN UNIV
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