Method for preparing polymer/houghite nano composite material
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A technology of nanocomposite materials and hydrotalcite, which is applied in the field of preparation of polymer/hydrotalcite nanocomposite materials, can solve the problems of long process route and impact, and achieve the effects of interaction, simple operation and low cost
Inactive Publication Date: 2009-10-21
ZHEJIANG UNIV OF TECH
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These methods are two-step composite methods, the process route is long, and the presence of hydrotalcite in the in-situ polymerization method affects the properties of the polymer such as molecular weight and molecular weight distribution.
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Embodiment 1
[0028] 0.5 g of hydrotalcite ([Mg 2+0.67 m 3+ 0.33 (OH - ) 2 ] 0.33+ (CO 3 2- 0.165 )·0.33H 2 O, produced by Huzhou Linghu Xinwang Chemical Co., Ltd.) was added to 100 g of water, stirred at room temperature for 1 h, and then dispersed by ultrasonic waves (power 500 w) for 10 min to obtain a hydrotalcite suspension.
[0029] Add 30g of styrene, 2.0g of sodium lauryl sulfate, 0.2g of potassium persulfate and 100g of deionized water into the reactor, stir at room temperature for 10min, raise the temperature to 70°C to start polymerization, and the polymerization reaction time is 8 hours. After the end, lower the temperature to allow the emulsion to cool naturally to room temperature.
[0030] Add 100g of hydrotalcite suspension to 50g of polymer emulsion by dropwise addition. The dropwise addition time is 1h. After the dropwise addition is completed, stir at 50°C for 1 hour. The composite particle suspension is filtered, washed, and dried to obtain the hydrotalcite cont...
Embodiment 2
[0032] The preparation of hydrotalcite suspension and polymer emulsion is the same as in Example 1.
[0033] Add 100g of hydrotalcite suspension to 100g of emulsion at one time, then raise the temperature to 40°C and stir for 3 hours. The composite particle suspension is filtered, washed and dried to obtain a polystyrene / hydrotalcite nanometer with a hydrotalcite content of 2.4wt%. composite material.
Embodiment 3
[0035] The preparation of hydrotalcite suspension and emulsion is the same as in Example 1.
[0036] Add 50g of hydrotalcite suspension to 100g of emulsion by dropwise addition, the dropwise addition time is 30min, after completion of the dropwise addition, heat up to 70°C and stir for 3 hours, the composite particle suspension is filtered, washed and dried to obtain hydrotalcite The content is 1.2wt% polystyrene / hydrotalcite nanocomposite.
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Abstract
The invention provides a method for preparing a polymer / houghite nano composite material, and the method comprises the following steps: 1) houghite is added to de-ionized water, and houghite suspension is obtained under the conditions of stirring and ultrasound; 2) a monomer, an anionic surfactant, an initiator and the de-ionized water are added into a polymer reactor, polymerization reaction is executed after the mixture is stirred uniformly, and polymer emulsion is obtained after cooling; and 3) the houghite suspension and the polymer emulsion are mixed and stirred to ensure houghite lamella and emulsion particles to form composite particles by electrostatic adherence, then the stirring is stopped, the composite particle suspension is filtered, washed and dried, and the polymer / houghite nano composite material is obtained. The method can realize organic modification of the houghite and the nano composition with the polymer in one step and has the advantages of low cost, simple operation and the like. In the prepared nano composite material, the houghite has good stripping dispersivity, and the interaction between the lamella and the polymer matrix can be regulated.
Description
(1) Technical field [0001] The invention relates to a preparation method of a polymer / hydrotalcite nanocomposite material. (2) Background technology [0002] Over the years, polymer materials have been widely used in various fields of the national economy, and have become one of the closely related and indispensable materials in people's material life. However, polymer materials have shortcomings such as insufficient rigidity, poor heat resistance, poor dimensional stability, easy aging, and flammability, which greatly limit their application fields. Inorganic materials have better strength, rigidity, heat resistance, aging resistance and size Therefore, compounding inorganic materials, especially inorganic nanoparticles with nanometer size, and polymer materials is the main means to improve polymer materials. When the nanoparticles are uniformly dispersed in the polymer, the rigidity and heat resistance of the composite material , flame retardant and barrier properties can...
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