Multifunctional rubber composite material containing bacterial cellulose and preparation method thereof

A technology of bacterial cellulose and composite materials, applied in the field of preparation of functional rubber, can solve the problems of difficult industrialization and high cost, and achieve the effect of water responsive function

Active Publication Date: 2019-02-15
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The former involves special monomers and new synthesis processes, and the cost is too high to achieve industrialization

Method used

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  • Multifunctional rubber composite material containing bacterial cellulose and preparation method thereof
  • Multifunctional rubber composite material containing bacterial cellulose and preparation method thereof
  • Multifunctional rubber composite material containing bacterial cellulose and preparation method thereof

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preparation example Construction

[0026] Such as figure 1 , the preparation method of the multifunctional rubber composite material containing bacterial cellulose of the present invention, comprises the following steps:

[0027] Step 1: Prepare 300mL of 5-10wt% sodium hydroxide / 7-15wt% urea mixed solution, add 30-70 parts of bacterial cellulose with a size of 1000-2000 mesh, and 500-1000W ultrasonic for 0.5-1h to obtain bacterial cellulose solution;

[0028] Step 2: Add 5-20 parts by mass of polyvinyl alcohol with a molecular weight of 5000-10000 and an alcoholysis degree of 90-98% into 500 mL of deionized water, heat to 95° C., and stir for 1-3 hours to obtain a polyvinyl alcohol solution. Adding the bacterial cellulose solution obtained in step 1 dropwise into the polyvinyl alcohol solution, and ultrasonicating at 500-1000W for 0.5-1h to obtain a polyvinyl alcohol-modified bacterial cellulose aqueous dispersion;

[0029] Step 3: Add 25-45 parts by mass of polyvinyl alcohol into 500 mL of deionized water, he...

Embodiment 1

[0042] Step 1: Prepare 300 mL of 5wt% sodium hydroxide / 15wt% urea mixed solution, add 30 parts by mass of bacterial cellulose with a size of 2000 mesh, and 500W ultrasonic for 1 hour to obtain bacterial cellulose solution;

[0043] Step 2: Add 5 parts by mass of polyvinyl alcohol with a molecular weight of 10,000 and a degree of alcoholysis of 90% to 500 mL of deionized water, heat to 95° C., and stir for 1 hour to obtain a polyvinyl alcohol solution. The bacterial cellulose obtained in step 1 The solution is added dropwise into the polyvinyl alcohol solution, and 500W ultrasonic is used for 1 hour to obtain the polyvinyl alcohol modified bacterial cellulose aqueous dispersion;

[0044] Step 3: Add 25 parts by mass of polyvinyl alcohol into 500 mL of deionized water, heat to 95°C, and stir for 1 hour to obtain a polyvinyl alcohol solution, which is mixed with rubber latex. The rubber latex is styrene-butadiene rubber, and the corresponding amount of dry glue is 100 parts by ma...

Embodiment 2

[0047] Step 1: Prepare 300 mL of 5wt% sodium hydroxide / 15wt% urea mixed solution, add 30 parts by mass of bacterial cellulose with a size of 2000 mesh, and 500W ultrasonic for 1 hour to obtain bacterial cellulose solution;

[0048]Step 2: Add 5 parts by mass of polyvinyl alcohol with a molecular weight of 10,000 and a degree of alcoholysis of 90% to 500 mL of deionized water, heat to 95° C., and stir for 2 hours to obtain a polyvinyl alcohol solution. The bacterial cellulose obtained in step 1 The solution is added dropwise into the polyvinyl alcohol solution, and 500W ultrasonic is used for 1 hour to obtain the polyvinyl alcohol modified bacterial cellulose aqueous dispersion;

[0049] Step 3: Add 45 parts by mass of polyvinyl alcohol to 500 mL of deionized water, heat to 95°C, and stir for 1 hour to obtain a polyvinyl alcohol solution, which is mixed with rubber latex. The rubber latex is natural rubber, and the corresponding amount of dry glue is 100 Parts by mass, ultrason...

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Abstract

The invention discloses a multifunctional rubber composite material containing bacterial cellulose and a preparation method thereof. A dissolution-regeneration process is adopted to reconstruct a complete three-dimensional network structure of bacterial cellulose in a polyvinyl alcohol/rubber composite material, so that the bacterial cellulose with the three-dimensional network structure can reinforce the composite material well on one hand, and a hydrogen bonding effect in the three-dimensional network is utilized to realize a water response characteristic of the composite material on the other hand; the polyvinyl alcohol in the composite material plays roles of a compatilizer and a plastic phase to avoid thermal vulcanization of rubber, so that a water-responsive functional rubber composite material with good recovery effect is obtained.

Description

technical field [0001] The invention belongs to the technical field of preparation of functional rubber, in particular to a multifunctional rubber composite material containing bacterial cellulose and a preparation method thereof. Background technique [0002] Functional material is a kind of self-adaptive material that can judge and process information about environmental conditions and changes obtained from its surface or inside, and respond to change its own structure and function, so as to coordinate well with the outside world. material system. Rubber is a kind of material with high elasticity, which is widely used in various fields of national economy. The intelligence of rubber materials has always been a research hotspot in the rubber industry. [0003] The preparation of functional rubber is generally by synthesizing rubber with a new molecular chain structure, or by adding functional fillers to endow traditional rubber materials with new functions. The former in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L9/06C08L7/00C08L9/02C08L29/04C08L1/02
CPCC08L7/00C08L9/02C08L9/06C08L2205/03C08L29/04C08L1/02
Inventor 贾红兵张旭敏王经逸
Owner NANJING UNIV OF SCI & TECH
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