Antibacterial wood-plastic composite and preparation method thereof
A wood-plastic composite material and composite material technology are applied in the field of antibacterial wood-plastic composite materials and their preparation, which can solve problems such as hazards, and achieve the effects of expanding application fields, reducing growth and reproduction, and having good biocompatibility and stability.
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Embodiment 1
[0021] The preparation of chitosan-nano-silver composite antibacterial agent: get 1 mass part of chitosan (viscosity average molecular weight 150,000, degree of deacetylation 90%) and be dissolved in the acetic acid solution of 100 mass parts 0.5wt%, prepare to obtain 1.0wt% chitosan acetic acid solution, add 0.5 parts by volume (i.e. chitosan acetic acid solution: the volume ratio of silver nitrate solution is 100:0.5) concentration is the silver nitrate aqueous solution of 0.05mol / L in the chitosan acetic acid solution, mix After reacting the liquid on a magnetic stirrer at 600r / min for 10min, slowly add 0.05mol / L sodium borohydride solution dropwise to it at the same rotating speed until the color of the mixed solution is yellowish brown and after sampling, pass through 0.1mol / L chlorine The sodium chloride solution is identified until no precipitation occurs, and the chitosan-nano-silver composite antibacterial agent is obtained.
[0022] Pretreatment of wood fiber powder:...
Embodiment 2
[0025] The preparation of chitosan-nano-silver composite antibacterial agent: get 0.5 mass parts chitosan (viscosity average molecular weight 50,000, degree of deacetylation 100%) and be dissolved in the acetic acid solution of 100 mass parts 1wt%, prepare 0.5wt% Chitosan acetic acid solution, in chitosan acetic acid solution, add 0.2 parts by volume (i.e. chitosan acetic acid solution: the volume ratio of silver nitrate solution is 100:0.2) concentration is the silver nitrate aqueous solution of 0.2mol / L, mixes After reacting on a magnetic stirrer at 800r / min for 15 minutes, slowly add 0.1mol / L sodium borohydride solution dropwise to it at the same speed until the color of the mixed solution is yellowish brown and after sampling, it is chlorinated by 0.1mol / L The sodium solution is identified until no precipitation occurs, and the chitosan-nano-silver composite antibacterial agent is obtained.
[0026] The pretreatment of lignocellulosic powder: the prepared chitosan-nano-sil...
Embodiment 3
[0029]The preparation of chitosan-nano-silver composite antibacterial agent: get 3 mass parts chitosan (viscosity average molecular weight 200,000, degree of deacetylation 90%) dissolve in the acetic acid solution of 100 mass parts 2wt%, prepare the shell of 3wt% Polysaccharide acetic acid solution, in chitosan acetic acid solution, add 0.4 parts by volume (i.e. chitosan acetic acid solution: the volume ratio of silver nitrate solution is 100:0.4) concentration is the silver nitrate aqueous solution of 0.1mol / L, mixed solution in After reacting on a magnetic stirrer at 700r / min for 20min, slowly add 0.2mol / L sodium borohydride solution dropwise to it at the same speed until the color of the mixed solution is yellow-brown and after sampling, pass through 0.1mol / L sodium chloride Until the solution is identified without precipitation, the chitosan-nano-silver composite antibacterial agent is obtained.
[0030] Pretreatment of wood fiber powder: the prepared chitosan-nano-silver ...
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