259results about How to "Improve oil absorption capacity" patented technology

The invention discloses a preparation method of an oil absorption material which is ultra-light in weight and has magnetic field response performance. The method comprises the following concrete preparation processes: dispersing magnetic nanoparticles, a porous material and a functional polymer into a dispersion medium; ultrasonically dispersing, and then drying by a freeze-drying method or a supercritical fluid drying method, and carrying out high-temperature treatment so as to obtain the magnetic oil absorption material which is very low in mass and has a porous structure. The method has the characteristics of being simple in preparation process, simple and feasible in reaction condition, and easy to achieve large-scale production; the prepared material can be applied to treatment of marine oil leakage, and separation of hazardous organic compounds in industrial sewage. The ultra-light magnetic oil absorption material floats on water to adsorb crude oil or organic matters when being used due to light weight, and quick magnetic separation and enrichment can be achieved after adsorption is ended.

The invention discloses superhydrophobic and superlipophilic sponge as well as a preparation method and application of the superhydrophobic and superlipophilic sponge. The preparation method comprises the steps of dispersing a fluorine-contained polyacrylate emulsion into absolute ethyl alcohol and uniformly stirring; then, adding hydrophobic nanosilicon dioxide and carrying out ultrasonic dispersion to obtain a fluorine-contained polyacrylate / silicon dioxide ethanol dispersion liquid; next, soaking polymer sponge into the fluorine-contained polyacrylate / silicon dioxide ethanol dispersion liquid for 5-30min, lifting, and then, drying the polymer sponge at the temperature of 75-110 DEG C to obtain the superhydrophobic and superlipophilic sponge, wherein the polymer sponge is cleaned by using acetone and distilled water and is dried. The preparation method is simple in process and mild in reaction condition; the prepared superhydrophobic and superlipophilic sponge can be used for rapidly and effectively removing oily organic matters in oily sewage, has relatively high oil absorption capacity, and can be recycled many times so as to be expected to be applied to the fields such as oily sewage treatment, raw oil leakage clearing and the like.

The invention discloses a hydraulic driving system for an offshore drilling compensation winch.A hydraulic secondary regulation element and a driven hydraulic cylinder jointly drive the winch to fulfill a heave compensation function, and a bit feeding hydraulic motor drives the winch to fulfill an automatic bit feeding function.During compensation, the driven hydraulic cylinder and a liquid-gas energy storage device thereof are used or bearing all static loads of a drilling rig and periodically recovering and releasing gravitational potential energy of loads; the hydraulic secondary regulation element operates in a constant-pressure network to overcome other loads in the compensation process, and the liquid-gas energy storage device periodically recovers and releases inertia kinetic energy of the a winch rotary system.During bit feeding, the driven hydraulic cylinder and the liquid-gas energy storage device thereof recover the gravitational potential energy of the loads of the drilling rig and release in lifting of a drilling rig traveling system.The hydraulic driving system is integrally compact in structure, a hydraulic energy recovery system is high in operation efficiency and long in service life, and an engine is low in power and power consumption.

The invention discloses a preparation method of a super-hydrophobic polyurethane sponge / iron oxide composite material used for oil-water separation and belongs to the field of composite materials. The preparation method comprises the following steps: carrying out ultrasonic washing on polyurethane sponge by dichloromethane and de-ionized water respectively to prepare a coarsening solution; coarsening the washed polyurethane sponge; preparing magnetic iron oxide particles from substances including ferric trichloride hexahydrate, glycol and the like through a magnetic separation method; adding 1-dodecanethiol into the magnetic iron oxide, adjusting the pH value and carrying out ultrasonic dispersion; adding tri-hydroxymethyl aminomethane into the dispersion solution, uniformly mixing and adding the polyurethane sponge; and stirring, washing and drying to obtain the super-hydrophobic polyurethane sponge / iron oxide composite material. According to the prepared iron oxide particles, a micro-nano structure is constructed on the surface of the sponge and low-surface-energy substances are introduced to prepare the composite material with super-hydrophobic and super-oleophylic properties, so that the composite material has the advantages of high oil absorption capability, selective separation of oil-water mixtures, rapid recycling of oil products and cyclic utilization of the material.

The invention relates to a hydraulic pump flow regulating device which is characterized in that a flow regulating system is additionally arranged in a system, i.e. a motor drives a bidirectional rotation hydraulic pump through a shaft coupling; a motor rotation speed controller controls the direction and magnitude of rotation of the motor; a first oil port of the bidirectional rotation hydraulic pump is communicated with an oil outlet of a unidirectional rotation hydraulic pump through a hydraulic tube; the hydraulic tube is communicated with a main oil outlet; the main oil outlet is communicated with an oil inlet of a control valve; and a second oil port of the bidirectional rotation hydraulic pump is communicated with an energy accumulator and a safety valve. The invention uses a servo motor with smaller power to continuously control the output flow of the whole hydraulic system in a lager power range, thereby reducing the control cost of the system; the bidirectional rotation hydraulic pump is adopted to enable the system to have an energy storage function; and the second oil port of the bidirectional rotation hydraulic pump is communicated with the energy accumulator, thereby improving the oil absorbing ability and the working rotation speed of the pump. The invention is suitable for traveling machinery driven by hybrid power.

The fire log comprises an organic fibre base that is over-saturated with vegetable cooking oil. The vegetable oil is contained and sealed therein by a casing made of the vegetable wax. More specifically, the fire log is over saturated with 65%-75% by weight of vegetable oil. The vegetable oil is used vegetable cooking oil. The organic fibre base represents about between 20%-30% by weight and consists of compressed paper-based products such as cardboard, newsprint and recyclable paper. The vegetable wax casing represents about between 1-5% of its weight. In another aspect of the present invention, the organic fibre base is made of broken fibres and interstices, and the vegetable oil is infused therein while these fibres are dilated from their natural states. In yet another aspect, the organic fibre base is formed in a perforated cylinder whereby a bark-like appearance is imprinted on its surface.

The invention provides lipophilic polyurethane sponge and a preparation method thereof. The lipophilic polyurethane sponge is based on porous polyurethane sponge as a matrix, and the matrix is grafted with a hydrophilic oleophobic C-C long chain group. As a way for implementation, by reaction of the polyurethane sponge and a C-C long chain-containing acyl chloride compound, so that the polyurethane sponge can be grafted with a C-C long chain by bonding of chemical bonds of amino, hydroxyl and-C (O) Cl functional groups in polyurethane. Experiments confirm that the structure can greatly reduce the surface energy of the polyurethane sponge, greatly improves the oil absorption capacity, and is low in price, non-toxic and non-pollution, so that the lipophilic polyurethane sponge is a good oil adsorption material, and can be used to quickly and efficiently adsorb and recover crude oil and other substances in crude oil leakage and other situations.

The invention provides a preparation method of an SiO2 (Silicon Dioxide) aerogel modified polypropylene melt-blown nonwoven material. The preparation method comprises the following steps of (1) usingtetraethyl orthosilicate as a silicon source, preparing SiO2 aerogel by a sol-gel method, and performing crushing after the SiO2 aerogel is subjected to hydrophobic modification to obtain hydrophobicSiO2 aerogel powder; (2) mixing the hydrophobic SiO2 aerogel powder with polypropylene slices, and performing melting granulation to obtain an SiO2 aerogel / polypropylene composite masterbatch; and (3) performing melt-blowing after the SiO2 aerogel / polypropylene composite masterbatch and pure polypropylene are mixed to prepare the SiO2 aerogel modified polypropylene melt-blown nonwoven material.Compared with a polypropylene melt-blown nonwoven material before modification, the modified material has higher oil absorption performance and a higher oil holding rate. The SiO2 aerogel modified polypropylene melt-blown nonwoven material provided by the invention has good mechanical properties, low production cost and a simple process, is hopeful to realize scaled production, and can be used foremergency treatment of oil stain and oil spilling leakage.

The invention relates to a preparation method of a collagen-based porous oil-absorbing material, and relates to the technical field of biomass resource recycling and environment-friendly oil-absorbing materials. A collagen-based porous oil-absorbing material preparation method provided by the invention comprises the steps that: (1) lime-expanded pelt scraps before tanning are cut into small pieces; pretreatments such as deliming, degreasing and dehydration are carried out, such that hide powder fiber is obtained; (2) the prepared hide powder fiber is dispersed in a buffering solution containing an epoxysilane coupling agent or polydimethylsiloxane for modification, such that hydrophobic lipophilic hide powder fiber is obtained; and (3) the modified hide powder fiber obtained in the step (2) is dispersed in water; and forming and drying ae carried out, such that the collagen-based porous oil-absorbing material is obtained. The method provided by the invention has the advantages of simple operation and low cost. The prepared oil-absorbing material has hydrophobic lipophilic properties and a porous structure. The material also has biodegradability and relatively high oil-absorbing capacity. Therefore, a novel application approach is developed for the high-value conversion and utilization of hide collagen fiber solid wastes.

A flexible microporous polymer sheet having first and second opposite major surfaces comprises a polymer matrix binding a filler component that exhibits high oil absorption capacity in its initial state before the start of material processing. The polymer matrix includes a polyolefin component and has three-dimensional interconnecting and interpenetrating pore and polymer networks through which the bound filler component is distributed from the first major surface to the second major surface. The polyolefin and filler components are included in amounts that result in a microporous polymer sheet having between about 75% and about 90% porosity and containing less than about 10 wt. % polyolefin component. Preferred polyolefin and filler components include ultrahigh molecular weight polyethylene and high oil absorption precipitated silica, respectively.

The invention relates to the field of chemical fibers and discloses a preparation method of a polyester-nylon parallel composite elastic fiber, wherein PET (polyethylene terephthalate) and nylon 6 aretaken as two parallel components, then the PET and nylon 6 are respectively subjected to melt extrusion through a screw extruder, the melts enter a two-component composite spinning assembly and a skin-core composite spinneret plate with a special design, and the sprayed melt is cooled, the cooled melt is oiled, and the oiled material is stretched and shaped and wound to obtain the polyester-nylonparallel composite elastic fiber, having the advantages of moisture absorption, air permeability, pilling resistance, bulkiness, high elasticity, fabric stiffness and the like. Compared with the current polyester-nylon composite fibers, the polyester-nylon composite fiber has better elasticity, and higher added value, and the problem of fiber opening of parallel polyester-nylon composite fibers is solved.

A low-temp throttle refrigerator with switchable gas tank and mixed working medium is composed of refrigerating compressor, switchable gas tank with high-and low-pressure electromagnetic valves, oil-gas separator, and fine oil-gas separator containing fibrous filtering core. Its advantages are high reliability and safety, high oil separating efficiency, and long service life.

The invention relates to a kenaf core / resin composite oil-absorption material and a preparation method thereof. The preparation method is characterized in that kenaf core waste in a textile industry is taken as a raw material to carry out graft copolymerization on oil-absorption resin and cellulose on the surfaces of kenaf core particles, so as to obtain a degradable kenaf core / resin composite high-oil-absorption resin. Compared with traditional inorganic oil-absorption materials and resin oil-absorption materials, the kenaf core / resin composite oil-absorption material and the preparation method have the advantages that the production cost can be substantially lowered, the waste of the textile industry is effectively utilized, and by utilizing a unique porous structure of a kenaf core, the oil absorption and keeping properties of the oil-absorption material are greatly improved; besides, after the kenaf core is subjected to graft copolymerization with the resin, the water absorbing capacity of the kenaf core is reduced, and the ratio of the oil absorbing capacity to the water absorbing capacity of the kenaf core is increased; the kenaf core simultaneously has the biodegradability of a straw and high water absorbing performance of the resin.

A phytopolyose sponge is prepared from phytopolyose through adding filler, plasticizer, softening agent, foaming agent, water-proofing agent and antiseptic, high-temp. fusing-plasticizing and puffingin an extruder ,and shaping by die extruding.

The invention discloses a method for extracting pea molasses and pea protein isolate from pea starch production wastewater. The method comprises the steps in sequence of protein extraction, acid sedimentation separation, washing separation, neutralization, whey concentration, flash distillation for sterilization, drying and powder-sieving. The extraction method can improve the purity and yield of pea protein isolate efficiently; wastewater generated from the production of pea protein isolate is collected for extracting pea molasses for use, so that the wastewater is fully utilized, and resource waste and environment pollution are alleviated. The pea protein isolate produced by the method has the content of more than 90%, has quite high water-retaining property and oil absorption capacity, and has gel formability better than that of soybean protein isolate. The pea molasses produced by the method is a brown syrup-shaped substance with the content of total sugar within 50%-60%, and has relatively great application prospect in the aspects of foods, medicines and light industry.

The invention discloses a super-hydrophobic and super-oleophylic cellulose sponge. The cellulose sponge comprises a porous cellulose sponge serving as a matrix, wherein a ZnO micro-nano structure is connected on the matrix, and at least an oleophylic and hydrophobic group is grafted on the ZnO micro-nano structure. The invention further discloses a preparation method of the uper-hydrophobic and super-oleophylic cellulose sponge. The super-hydrophobic and super-oleophylic cellulose sponge has excellent oil absorption capacity, is low in price and environment-friendly and pollution-free and can be widely used in fields such as oil spilling treatment, oil-water separation and the like.

The invention discloses a method for preparing porous starch, wherein the method comprises the following steps: firstly, squeezing starch; rapidly gelatinizing the surfaces of partial starch particles, and expanding the pre-gelatinized starch particle surfaces, so that structures become loosen; then, drying the starch under normal pressure and grinding so as to obtain pre-gelatinized starch; and preparing an emulsion from the pre-gelatinized starch, and ultrasonically processing the emulsion so as to form pores in the surfaces of the starch particles more easily and to bring about benefit for subsequent hydrolysis of saccharifying enzyme and amylase along the positions of the pores, thereby forming the porous starch. The method disclosed by the invention can be used for promoting the rapid formation of the pores in the porous surface and greatly enhancing a pore-forming effect, so that the obtained porous starch is better in performance and oil-absorbent capacity is greatly improved compared with unprocessed raw starch; and the method is simple in process and is relatively low in cost.

The invention discloses a polyurethane sponge loaded with a hybridized graphene coating and a preparation method of the polyurethane sponge. The sponge is formed by loading the micrometer zinc oxide hybridized graphene coating on a polyurethane sponge, and the thickness of the coating is 0.3-0.8mm; the mass ratio of zinc oxide to graphene is 5 percent. According to the test of the hydrophobic effect and the oil absorption ability of the loaded sponge, an experiment shows that the hydrophilia of the sponge turns into high hydrophobicity (a contact angle is 147.9 degrees), the oil adsorption ability of the sponge is obviously increased, and the saturated adsorption quantity of the sponge on diesel reaches 28.01g. Graphene which is modified with hybridized micrometer zinc oxide and graphene oxide is loaded on the sponge, so that the hydrophobic and lipophilic property of the polyurethane sponge is improved; therefore, the effective preparation method for oil polluted water body remediation is provided.

The invention discloses a cellulose / silicon oxide composite aerogel elastomer, a preparation method thereof and an application of the elastomer in the field of oil-water separation, and belongs to thefield of oil-water separation materials. Bacterial cellulose has wide macropores, and is obtained by in-situ co-culture of acetobacter xylinum and polystyrene small spheres with different sizes, andthe pore size of the cellulose can be adjusted in the range of 500-1700[mu]m. The silicon oxide is compounded with the bacterial cellulose to topologize the three-dimensional network structure of thecellulose, and therefore the cellulose / silicon oxide composite aerogel with a high porosity and elasticity is obtained. The cellulose / silicon oxide composite aerogel elastomer provided by the invention can be directly dried at normal temperature and pressure, the steps such as supercritical drying or freeze drying necessary for the preparation of a traditional aerogel are avoided, and the production costs are reduced; after the aerogel elastomer is reused for 20 times, the oil absorption capacity can still reach 94% of initial capacity; and the preparation method provided by the invention is simple, and the material is friendly to the environment, is biodegradable, does not cause secondary pollution to the environment, and has good application prospects in the field of oil-water separation.

The invention discloses a steel wire rope composite sisal hemp rope core for an elevator and a preparation method thereof. The steel wire rope composite sisal hemp rope core is prepared by using sisalhemp, aramid fibers and a stainless steel wire as raw materials for weaving. The composite rope core is prepared by multiple times of twisting 3-6 sisal hemp composite core folded yarns, and each sisal hemp composite core folded yarn is formed by a sisal hemp yarn, a palm yarn, and an aramid fiber / stainless steel core covering yarn in a certain proportion. The palm yarn is uniformly distributed in a main core, and the outside of the main core is wrapped by the aramid fiber / stainless steel core covering yarn. The rope core for a steel wire rope is prepared by using the palm yarn and the aramidfiber / stainless steel core covering yarn, defects of the sisal hemp rope core that capacity of storing grease is inadequate, there are many burrs, uniformity is poor, a local part is protruded and the like are solved, and strength of the composite rope core is optimized.

The invention discloses a preparation method of a high-adsorption supported photocatalyst. The method comprises the following steps: 1, respectively weighing a photocatalyst raw material, a curing agent, a film forming agent and a dispersant, adding the raw material, the curing agent, the film forming agent and the dispersant into a film forming assistant, mixing and dissolving, and carrying out ultrasonic dispersion to obtain a photocatalysis powder suspension liquid; 2, immersing a supporting carrier in the photocatalysis powder suspension liquid, carrying out ultrasonic dispersion, and standing; 3, carrying out film forming drying on the supporting carrier obtained in step 2 at 80-120DEG C; and 4, sintering the film forming dried supporting carrier at 200-800DEG C for 2-8h, and naturally cooling the supporting carrier to obtain the high-adsorption supported photocatalyst. The high-adsorption supported photocatalyst prepared in the invention has the advantages of uniform dispersion, good photocatalytic activity, extremely good adhesiveness and super strong adsorption effect.

The invention provides a method for preparing a three-dimensional natural fiber oil-absorbing material. The method is characterized by comprising the following steps that 1, a cellulose fiber and a low-melting point fiber are loosened and blended, wherein the percentage by mass of the low-melting point fiber is 10 to 20 percent; 2, the loosened and blended fiber raw material is processed into a fiber net by airflow net-forming equipment; 3, the fiber net is heated and stuck into a three-dimensional structure, wherein the heating and sticking temperature is 130 to 160 DEG C, and the heating and sticking time is 20 to 100 minutes. According to the method for preparing the oil-absorbing material which takes a natural fiber, such as ceiba, bulrush floss, linter and bamboo pulp fiber as a raw material, a relatively ideal clustering state and a stable three-dimensional fiber clustering body structure of the natural fibers in a fiber clustering body are realized, the comprehensive oil-absorbing property of the fiber is improved, and the problems that scattered fibers are difficult in reclamation and oil leakage is caused again in the practical application of the fibers are well solved.

The invention provides an oily matte canvas for hand painting. A preparation method of the canvas comprises the following steps: (1) preparing a gel resin layer material; (2) preparing a base coat material; (3) preparing a top coat material; (4) firstly carrying out calendering treatment on a grey cloth, then spraying the gel resin layer and then carrying out drying with a drying oven; (5) spraying the gel resin layer with the base coat, then carrying out drying by adopting the drying oven and then carrying out heating calendering; (6) spraying the base coat with the top coat, then carrying out drying by adopting the drying oven and then carrying out calendering treatment. The prepared canvas has high brightness, strong oil absorbency, saturability and good sense of sagging, is used for decoration, adapts to different pigments and is used for painting artists to select favorite luster according to different background requirements.

The invention discloses a preparation method of polyurethane foam. The method comprises the following steps: by using nano calcium carbonate, a silane coupling agent, polyether glycol, a foam stabilizer, water, triethylenediamine, tin dibutyl dilaurate and toluene diisocyanate as raw materials, introducing the silane coupling agent to carry out activation modification treatment on the nano activated calcium carbonate, and carrying out foaming reaction on the toluene diisocyanate and modified nano calcium carbonate in a reaction kettle to prepare the polyurethane flexible foam. The polyurethane foam prepared by the method can enhance the oil absorbency and reusability of oil products. The modified nano calcium carbonate can perform a reinforcing function on the polyurethane flexible foam, so that the oil absorbency is not obviously lowered after 1000 times of repeated use.

The invention discloses a paste water-based isolation agent, a preparation method and an application method thereof thereof. The paste water-based isolation agent comprises the following components by mass: 3-5 parts of an inorganic powder additive, 0.1-1.0 part of an anionic surfactant, 0.5-5.5 parts of a nonionic surfactant, 5-10 parts of a thixotropic agent, 0.2-2.0 parts of a thickener, 0.1-0.5 part of a defoaming agent, and 60-100 parts of deionized water. The preparation method consists of: mixing water with the surfactants, conducting stirring dissolving, adding the inorganic powder additive, and adding the defoaming agent dropwise, adding the thixotropic agent and thickener in batches, stirring the materials fully, and performing grinding to a homogeneous phase, thus obtaining the isolation agent. And the application method includes: during use, preparing the isolation agent into a water solution according to a mass ratio of 1:3-15, adding the water solution into a water cooling groove of a rubber slice to realize isolation agent coating at the same time of water cooling, and then carrying out rod hanging drying and stacking. The paste water-based isolation agent provided by the invention has the advantages of easy water dissolution, no toxicity, no smell, simple process and low cost, and almost has no effect on the subsequent processing performance of rubber.

The invention discloses a high-speed pump which comprises a shell (1), a pump cover (2), a pump shaft (3), an inclined disc (4), a sliding shoe (5), a cylinder (6) and a distributing disc (7). The pump cover (2) is mounted at the rear of the shell (1), the pump shaft (3) is penetratingly arranged in the shell (1), the inclined disc (4), the sliding shoe (5), the cylinder (6) and the distributing disc (7) are sequentially mounted on the pump shaft (3), the sliding shoe (5) and the cylinder are in transmission via a plunger (9), the cylinder (6) is connected with the pump shaft (3) by an involute spline, and an impeller (12) is mounted at the rear end of the pump shaft (3) and is connected with the pump shaft (3) by an involute spline. The high-speed pump has the advantages that the impeller and the pump shaft rotate at the same speed, and the pressure of an oil outlet chamber of the impeller is increased along with increase of the rotational speed of the pump shaft, so that oil absorption capacity of the pump in a high-speed state is improved, and cavitation is effectively avoided; and the pump shaft is flexibly connected with the cylinder by the involute spline, eccentric wear of a high-pressure side is eliminated, reliability of the performance of a pump body is strengthened, and the service life of the high-speed pump is prolonged.

The invention relates to an oil absorption felt material with a skin / core composite structure. A compact non-woven material forms a skin layer, and a core layer material is composed of multilayers of loose non-woven materials. The skin layer material is a polypropylene melt-blown non-woven material with a gram weight of 15-50g / m<2>, the core layer material is a polypropylene / polyester mixed melt-blown non-woven material with a thickness of 3-5cm, the core layer material is coated by the skin layer material hermetically, and the periphery is sealed by means of hot pressing. For the oil absorption felt material, the skin layer material has high oleophylic and hydrophobic effects, when the oil absorption felt contacts oil, oil molecules can be led into the oil absorption felt inner core to be adsorbed by the inner core layer material, and water molecules cannot enter the core layer through the skin layer material, the core layer material can adsorb oil products with a self weight of 10-15 times, the oil products are sealed and stored in the oil absorption felt core layer and do not leak. The oil absorption felt provided by the invention has high oil absorption and oil holding performance.

The invention relates to a sponge material and a preparing method thereof, in particular to polyurethane sponge compositely modified through expanded graphite and zinc oxide and a preparing method thereof. The sponge is characterized in that the composite modification is carried out on the polyurethane sponge through expanded graphite and zinc oxide, a layer of even and dense coating is formed on the surface of the polyurethane sponge, and high dewatering lipophilicity (the contact angle between the sponge and water is 149 degrees) is obtained after the sponge is modified. The mass ratio of expanded graphite to zinc oxide is 28:1, and the thickness of the composite coating of the sponge is 0.6-0.9 mm. The prepared sponge can rapidly adsorb oil in water selectively, cyclic utilization can be achieved, and secondary pollution is avoided; an efficient and environment-friendly adsorption material is provided for treating water pollution by oil.

The invention relates to the field of sea surface oil stain treatment and discloses a calcined shell micropore structure-based sea surface oil stain treatment micropowder preparation method. The preparation method comprises A, calcining shells at a temperature of 300-500 DEG C for 20-50min, heating the shells to a temperature of 700-850 DEG C in 10min, carrying out constant temperature calcining for 5-10min, carrying out cooling to a temperature of 400-600 DEG C in 5-10min and carrying out natural cooling to the normal temperature, B, breaking the shells to obtain shell micropowder and carrying out surface modification, C, carrying out mixing foaming on the surface-modified shell powder, carboxymethylcellulose, polyether polyol, isocyanate, a catalyst and water to obtain a hard foam material and D, crushing the hard foam material to obtain a finished product. The oil stain treatment micropowder has a good oil-absorption capability and good dispersibility and floatability on the sea surface, can be degraded naturally and is environmentally friendly.