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CN-121972150-A - Bio-based composite multistage Kong Xiyou granule and preparation method thereof

CN121972150ACN 121972150 ACN121972150 ACN 121972150ACN-121972150-A

Abstract

The invention discloses bio-based composite multistage Kong Xiyou particles and a preparation method thereof, relates to the technical field of oil absorption materials, and aims to solve the problems of single pore structure, poor mechanical strength, low deoiling rate, insufficient environmental friendliness and the like of the existing oil absorption materials. The oil absorption particles consist of, by weight, 40-60 parts of an inorganic matrix, 20-40 parts of a biological base component, 1-5 parts of a hydrophobic modifier and 1-3 parts of a binder, wherein the inorganic matrix is selected from silicate, diatomite and the like, the biological base component is preferably compounded with rice hull powder in a ratio of 1:1, the hydrophobic modifier is KH-550, stearic acid and the like, and the binder is polyvinyl alcohol or sodium carboxymethyl cellulose. The preparation method comprises four steps of pulping, granulating and drying, roasting and hydrophobically modifying, namely firstly mixing an inorganic matrix with a bio-based component for pulping, granulating and drying, roasting at 350-500 ℃ to form an inorganic-bio-based interpenetrating network structure and a multi-level pore composite framework, and then carrying out gas phase or liquid phase hydrophobically modifying to obtain a finished product. The oil absorption multiplying power of the product reaches 1.8-2.5g/g, the mechanical compression deoiling rate after adsorption saturation is more than 90%, the single compressive strength is more than or equal to 6.1N, the product has the core performances of high-efficiency oil absorption and high mechanical strength, the renewable bio-based component is introduced, the 60d biodegradation rate is 82% -90%, the product is common solid waste, no secondary pollution is caused, the component proportion and the technological parameters can be flexibly adjusted, and the product is suitable for industrial/environment-friendly oil stain treatment scenes such as oil-containing wastewater treatment, offshore oil spill cleaning and the like, and has remarkable practical value and environmental protection significance.

Inventors

  • YUAN JIKANG
  • JIN LIQIAN
  • CHEN XINJIAN
  • JIN JIANZHONG
  • YANG HAIMING

Assignees

  • 浙江炳晟科技有限公司

Dates

Publication Date
20260505
Application Date
20260331

Claims (10)

  1. 1. The bio-based composite multistage Kong Xiyou particle is characterized by comprising, by weight, 40-60 parts of an inorganic matrix, 20-40 parts of a bio-based component, 1-5 parts of a hydrophobic modifier and 1-3 parts of a binder; The inorganic matrix is selected from one or more of silicate, diatomite, magnesium silicate and aluminosilicate; the bio-based component is one or more selected from starch, lignin, cellulose, chitosan, rice hull powder, straw powder and biochar.
  2. 2. The bio-based composite multi-stage Kong Xiyou particle according to claim 1, wherein the bio-based composite multi-stage hole oil absorption particle comprises, by weight, 45-55 parts of an inorganic matrix, 25-35 parts of a bio-based component, 1-5 parts of a hydrophobic modifier, and 1-3 parts of a binder; The inorganic matrix is selected from one or more of silicate, diatomite, magnesium silicate and aluminosilicate; the bio-based component is one or more selected from starch, lignin, cellulose, chitosan, rice hull powder, straw powder and biochar.
  3. 3. The bio-based composite multi-stage Kong Xiyou granule of claim 1, wherein the inorganic matrix is diatomaceous earth, or a combination of diatomaceous earth and silicate, and the weight ratio of diatomaceous earth to silicate is 3:1-5:1 when combined.
  4. 4. The bio-based composite multistage Kong Xiyou granule of claim 1, wherein the hydrophobic modifier is one of KH-550, stearic acid or heptadecafluorodecyl triethoxysilane.
  5. 5. The bio-based composite multi-stage Kong Xiyou granule of claim 1, wherein the binder is one of polyvinyl alcohol (PVA) or sodium carboxymethyl cellulose (CMC).
  6. 6. The bio-based composite multistage Kong Xiyou granule according to claim 1, wherein the oil absorption magnification of the granule is 1.8-2.5g/g, and the mechanical compression deoiling rate after adsorption saturation is >90%.
  7. 7. The bio-based composite multistage Kong Xiyou granule of claim 1, wherein the bio-based component is a complex of two or more components, and the weight ratio of lignin to rice hull powder is 1:1.
  8. 8. A method of preparing the bio-based composite multistage Kong Xiyou granule of claim 1, comprising the steps of: S1, mixing an inorganic matrix and biological matrix components in proportion, adding a dispersion medium, and stirring to prepare uniform slurry; s2, granulating the slurry into 1-5mm particles, and drying at 80-100 ℃ for 4-6 hours to obtain dry blank particles; S3, roasting the dry blank particles at 350-500 ℃ for 2-4 hours to obtain a porous composite framework; s4, performing gas-phase or liquid-phase hydrophobic modification on the porous composite skeleton particles, and washing and drying to obtain finished oil absorption particles.
  9. 9. The preparation method of the non-caking slurry according to claim 8, wherein in the step S1, the dispersion medium is water or ethanol, the stirring speed is 300-500r/min, the stirring time is 20-30min, the uniform slurry without caking is prepared, and in the step S3, the temperature rising rate of roasting is 5-10 ℃/min, and the temperature is kept at a constant temperature after the temperature is programmed to 350-500 ℃.
  10. 10. The preparation method according to claim 5, wherein in the step S4, the vapor deposition method is that skeleton particles and a hydrophobic modifier are placed in a closed container and kept at 80-120 ℃ for 1-2 hours, and the liquid phase impregnation method is that the hydrophobic modifier is prepared into a solution with the mass concentration of 1-5%, the skeleton particles are immersed for 30-60min, and the solution is dried to constant weight at 60-80 ℃ after suction filtration.

Description

Bio-based composite multistage Kong Xiyou granule and preparation method thereof Technical Field The invention relates to the technical field of oil absorption materials, in particular to bio-based composite multistage Kong Xiyou particles and a preparation method thereof. Background With the increasing of industrial development and human activities, the problems of oil pollution such as oil-containing wastewater discharge, offshore oil spill and the like are increasingly prominent, and not only ecological environment is destroyed, but also resource waste is caused, so that the development of the oil absorbing material with high efficiency, environmental protection, low cost and good mechanical property becomes a hot spot of current research, and the bio-based composite oil absorbing material becomes an important research and development direction due to the advantages of being renewable and degradable. At present, the research and development of the oil absorbing material mostly surrounds the composite development of an inorganic matrix and a bio-based component, wherein the inorganic matrix is commonly used for silicate, diatomite, magnesium silicate, aluminosilicate and the like, the material has a natural porous structure and good mechanical strength, can be used as a framework support of oil absorbing particles, has strong hydrophilicity and limited oil absorbing multiplying power, is easy to desorb after absorbing oil, and limits the application of the material, the bio-based component is commonly used for starch, lignin, cellulose, rice hull powder and the like, has wide sources, is degradable and has certain adsorption performance, but has poor mechanical strength of single bio-based material, and is difficult to be independently used as the oil absorbing material. The existing organic oil-absorbing materials such as polyurethane foam and the like have the problems of difficult degradation, secondary pollution and the like, and cannot meet the green environment-friendly requirement. The existing bio-based composite oil absorption material tries to combine an inorganic matrix with bio-based components, but has the problems of unreasonable component proportion and no high-efficiency synergistic effect, and lacks a targeted hydrophobic modification design, so that the product has a single pore structure, the oil absorption multiplying power is difficult to reach the practical requirement of 1.8-2.5g/g, the mechanical compression deoiling rate after the adsorption saturation is lower than 90%, the mechanical strength is insufficient, and the dual requirements of high-efficiency oil absorption and recoverability cannot be realized. In addition, in the existing composite system, the composite formula of the inorganic matrix and the bio-based components is not optimized enough, for example, the composite proportion of diatomite and silicate and the composite proportion of lignin and rice hull powder are not reasonably regulated and controlled, and the synergistic improvement of oil absorption performance and mechanical performance is further influenced. Therefore, the bio-based composite multistage Kong Xiyou particle which has reasonable component proportion, excellent pore structure, high oil absorption efficiency, high mechanical strength, recoverability and environmental protection is developed, and the bio-based composite multistage Kong Xiyou particle has important practical significance and application value. Patent CN119097575A discloses a fluffy microsphere applied to dry hair spraying, a preparation method and oil absorption particles, and a quaternary system consisting of hollow corn starch, HDI/trimethylol hexyl lactone cross-linked polymer, zinc oxide and lauroyl lysine is suitable for mild oil absorption of daily chemicals, but has no industrial strength. In summary, there is still a need in the industry for a scientifically proportioned composite oil absorption material which not only can construct a high-strength framework structure by relying on inorganic components, but also can endow a bio-based material with excellent degradability, and can realize efficient adsorption of oil stains. Disclosure of Invention The invention aims to provide a bio-based composite multistage Kong Xiyou granule and a preparation method thereof, which are used for solving the problems in the background technology. The technical scheme of the bio-based composite multistage Kong Xiyou particle comprises, by weight, 40-60 parts of an inorganic matrix, 20-40 parts of a bio-based component, 1-5 parts of a hydrophobic modifier and 1-3 parts of a binder; The inorganic matrix is selected from one or more of silicate, diatomite, magnesium silicate and aluminosilicate; the bio-based component is one or more selected from starch, lignin, cellulose, chitosan, rice hull powder, straw powder and biochar. Further, the bio-based composite hierarchical pore oil absorption particles comprise, by weight, 45-55 parts of an inorgan