The invention discloses a bio-based composite hierarchical pore
oil absorption particle 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 oil removal rate, insufficient
environmental protection property and the like of the existing
oil absorption material. The oil absorption particle is prepared from the following components in parts 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
silicate, diatomite and the like, the bio-based component is preferably compounded by
lignin and rice
hull powder according to 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 the following four steps: pulping, granulating and
drying,
roasting and hydrophobic modification, namely mixing the
inorganic matrix and the bio-based component, pulping, granulating and
drying,
roasting at 350-500 DEG C to form an inorganic-bio-based interpenetrating
network structure and a hierarchical pore composite framework, and carrying out gas-phase or liquid-phase hydrophobic modification to obtain a finished product. The oil
absorption rate of the product reaches 1.8-2.5 g / g, the mechanical compression deoiling rate after adsorption saturation is larger than 90%, the single
compressive strength is larger than or equal to 6.1 N, and the core performance of efficient oil absorption and high
mechanical strength is achieved; the renewable bio-based component is introduced, the 60d
biodegradation rate is 82%-90%, the
solid waste is common
solid waste, and secondary
pollution is avoided; and the component ratio and process parameters can be flexibly adjusted, and the oil
stain treating agent is suitable for industrial / environment-friendly oil
stain treatment scenes such as oil-containing
wastewater treatment and offshore
oil spill cleaning, and has remarkable practical value and environment-friendly significance.