Full-biodegradable modified material and preparation method thereof
A modified material and all-biological technology, applied in the field of all-biodegradable materials, can solve the problems of being unable to degrade, increase the degradation time, etc., and achieve the effect of facilitating complete decomposition, increasing strength, and improving the effect of tensile resistance
Pending Publication Date: 2022-07-05
安徽省埠超环保科技有限公司
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Problems solved by technology
[0004] According to the standard of the State Administration of Supervision and Administration, the requirement for biodegradable materials is 180 days to reach a relative biodegradation rate of more than 90%, and because some additives are often added to general biodegradable materials to ensure the physical properties of raw materials, resulting in final Some non-degradable substances remain in the product, and in order to ensure the mechanical properties of the product, the connection of the material is often made more stable, resulting in an increase in the subsequent degradation time. "By the compounding of polylactic acid, starch, butylene adipate and butylene terephthalate copolymer, polylactide polyol to achieve full biodegradation, while ensuring certain mechanical properties, but due to That
Method used
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Embodiment 1
[0025] Preparation of fully biodegradable materials:
[0026] (1) Shell powder pretreatment: 14kg of marine oyster shell powder is ground and placed in a calciner and calcined at a temperature of 380 ° C for 40min, and then take out, grind and pulverize and pass through an 80-mesh sieve to obtain the calcined shell powder for subsequent use;
[0027] (2) Premix: Mix 60kg of PBAT and 9kg of PLA, use a high-speed mixer to adjust the temperature to 160°C, stir and mix at a stirring speed of 400r / min for 20-30min, and then add 0.9kg of silane coupling agent KH560, the glycidyl methacrylate of 0.5kg, the maleic anhydride of 0.4kg continue to stir 10-15min, get premix after homogeneous;
[0028] (3) Primary granulation: the above-mentioned premix is mixed with 13kg of modified starch, then added to the twin-screw extruder, and the mixture is heated by zone, wherein the temperature in one zone is 160° C., and the mixing time is 30 min. The temperature of the zone is 165°C, the mix...
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Abstract
The invention provides a full-biodegradable modified material and a preparation method thereof, and relates to the technical field of full-biodegradable materials. The full-biodegradable modified material is prepared from PBAT, PLA, modified starch, shell powder, a coupling agent, a compatilizer and other raw materials through the steps of shell powder pretreatment, premixing, primary granulation, secondary granulation and the like. The defects in the prior art are overcome, the material performance of the final material is effectively guaranteed through compounding of various substances, the degradation efficiency is further improved, the environmental burden is reduced, the prepared material is low in cost and easy to obtain, the production cost can be effectively reduced, and the application market of the material is improved.
Description
technical field [0001] The invention relates to the technical field of fully biodegradable materials, in particular to a fully biodegradable modified material and a preparation method thereof. Background technique [0002] Fully biodegradable materials are fully biodegradable materials, which generally refer to materials that can be completely decomposed into low molecular compounds by microorganisms (such as bacteria, fungi and algae, etc.) under appropriate and demonstrable natural environment conditions. The environment has an active role. [0003] Biodegradable materials can be roughly divided into two categories according to their biodegradation process. One is completely biodegradable materials, such as natural macromolecular cellulose, synthetic polycaprolactone, etc. Its decomposition mainly comes from: ① The physical collapse of the plastic structure due to the rapid growth of microorganisms; ② Due to the biochemical effects of microorganisms , various hydrolysis ...
Claims
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Patent Timeline
Login to View More IPC IPC(8): C08L67/02C08L67/04C08L3/12C08L29/04C08L5/04C08L5/08C08K3/04C08K5/053C08K3/26
CPCC08L67/02C08K2003/265C08L2201/06C08L2201/08C08L67/04C08L3/12C08L29/04C08L5/04C08L5/08C08K3/042C08K5/053C08K3/26
Inventor 秦超秦子航
Owner 安徽省埠超环保科技有限公司