Sponge Rubber Research Articles

From a sustainable natural rubber sponge to an activation-free sulfur-rich biocarbon sponge as a potential electrode material for a supercapacitor

A natural rubber sponge (NRP) was prepared by varying the carbon black, blowing agent, and sulfur contents and subsequently used as a precursor for biocarbon sponge (BC) production. The experiments and the machine learning approach used an adaptive multi-input, fuzzy-rules, emulated network (MiRREN) to optimize the NRP formulation to achieve the best BC properties. Based on the results, adding carbon black stabilized the shape of the BC samples after carbonization. The BC samples had an interconnected pore structure and oxygen and sulfur functionalities. The standard isotherm of the sample without carbon black was type IV, which was transformed to type II after adding carbon black, with a wide range in the pore size distribution. The addition of carbon black improved the electrical conductivity from 1.13 S cm−1 to a maximum value of 12.78 S cm−1. At 0.25 A/g, the samples’ specific capacitance was enhanced to 152.7 and 137.9F/g using certain conditions with carbon black. The sample with 50, 6, and 20 phr of carbon black, blowing agent, and sulfur contents, respectively, had the best cyclic performance (113.7 %) at 10,000 cycles of testing, verifying the excellent cyclic durability due to the surface functionalities and the addition of the carbon black, as well as the developed interconnected pore structure. Based on the results of the machine learning study, the pore volume and specific capacitance were likely correlated with the blowing agent content rather than the sulfur content. The optimum formulation of NRP for achieving the best specific capacitance levels at all the applied current densities was 7.02 phr of blowing agent and 20.2 phr of sulfur content.

Study on hemostatic and antibacterial properties of modified silicone rubber sponge

At present, gauze compression and hemostatic powder are commonly used in first aid to stop bleeding. However, the hemostatic effect of gauze compression is poor, and the hemostatic powder is easy to block blood vessels and causes thrombosis. Therefore, developing hemostatic materials with rapid hemostatic function and biosafety remains a challenge. In this article, a double layer hemostatic dressing based on silicone rubber (SR) was prepared. Among them, sponge layer was modified with polydopamine (PDA), and connected to the hydrophilic polymer polyvinylpyrrolidone (PVP) by strong hydrogen bonding. The synergistic synergy of the blood cell affinity of the catechol group and the water absorption of sponge enhanced the hemostatic ability. For the SR layer, ZnO was grown in situ by hydrothermal method as an antimicrobial layer (SRZ). SRZ/PDA-PVP dressing has good mechanical properties, antibacterial properties, coagulation ability and excellent biocompatibility, providing a new idea for the development of hemostatic materials.

Retrieving a file binder from a bookshelf using pseudo-curved trajectory generation for a foldable robotic hand

Human-assistive robots need to perform trajectory making for and control of a robotic hand along the many rotating mechanisms in our living spaces. If such trajectory control can be performed without high-cost sensors, certainly a significant cost reduction in building the robot will be achieved. This paper describes a method of retrieving a file binder by generating a pseudo-curved trajectory for tilting it using a simple system. A simple claw mechanism with a switch sensor to grasp an object was designed and 3D-printed, and it was attached to a 6-DOF foldable robotic hand developed by the authors. A method for generating a pseudo-curved trajectory using the switch sensor was developed, and the robotic hand was successfully moved along this trajectory to tilt and grasp a file binder to retrieve it from a bookshelf. Experiments to clarify the success rate were also conducted, and it was found that the results depend on the rotational speed of manipulator links and the vibration of the claw mechanism link. A rubber sponge was added to give flexibility to the claw mechanism, which significantly improved the success rate. Furthermore, a control system to recover from tilting failure was constructed, and its effectiveness was validated by experiments.

Construction of a reduced graphene oxide/polyvinyl alcohol (PVA)-natural rubber (NR) porous rubber sponge toward solar-driven sustainable water purification

Solar-driven evaporation is an environmentally benign and sustainable technology to address the global water crisis. The abundant and renewable solar energy as its sole input energy, thus leading to zero-carbon emission and minimum environmental impact. Thus, in this work, a hydrophilic reduced graphene oxide (rGO)/polyvinyl alcohol (PVA)-natural rubber (NR) porous rubber sponge was obtained by emulsion ice template and vulcanizing at high temperature. The cross-linked NR rubber and the robust PVA endow rGO/PVA-NR sponge with excellent flexibility integrated outstanding mechanical robustness. The water evaporation rate of the resultant rGO/PVA-NR evaporator can reach up to 2.11 kg·m−2·h−1 under 3 sun illumination. Moreover, benefitting from the multi-scale porous structure and hydrophilicity of the rGO/PVA-NR sponge, water is continuously transported from the bulk water to the evaporation surface in whole evaporation process, ensuring a continuous water supply and salt self-cleaning. Moreover, the results of practical solar-driven interfacial evaporation under outdoor conditions indicated that rGO/PVA-NR evaporator has overall multifunctional purification for inorganic ions and wastewater contaminated with organic dyes. This investigation provides a convenient and environmentally friendly strategy toward developing high-performance solar steaming technologies based on rubber sponge for effective water purification to address the global water crisis.

Synergistic Effect and Electrical Properties of Microporous Liquid Metal/Carbon Nanotube Polymer Sponge.

Sensing sponge materials with light weight, high elasticity, and electrical sensing properties are in enormous demand in electronic fields, but there is an imminent need to develop a scalable and facile method for the manufacture of the sensing material. Herein, an efficient in situ polymerization and convenient preparation process is reported to manufacture the microporous liquid metal/carbon nanotube-polysulfide rubber (LM/CNT-PSR) sponges with excellent mechanical and electrical properties, based on fluidic LMs and rigid CNTs with unique synergistic effect for sponge composites. Excellent mechanical properties of LM/CNT-PSR sponges, such as low density, excellent elasticity, remarkable mechanical recoverability, and self-healing property, are endowed by the interconnected microporous structure of sponge and flexible polysulfide rubber matrix with disulfide bonds. In addition, the synergistic effect of LMs and CNTs leads to excellent conductivity and unique electrical sensing property under mechanical pressure. Microporous LM/CNT-PSR sponges with high performance and simple fabrication process are promising sensing materials for various electronic devices, such as human motion monitoring, and weighing sensing.

Effect of Blowing Agents on Properties of Cellular rubber of Natural rubber / Chloroprene blends

Cellular or sponge rubber can be by expansion of fluid state by gas produced from decomposition of foaming agents [1]. It can be manufactured from various types of rubber and chemicals depending on properties required [2]. Natural rubber can give excellent mechanical properties except for thermal ageing [3]. The objectives of this work were to improve thermal ageing of NR foam by incorporating chloroprene rubber, CR, into NR and foaming NR/CR blends. In order to study the effects of the type of chemical blowing agents on the properties of cellular NR/CR rubber blends, azodicarbonamide (ADC) and oxybisbenzenesulfonyl hydrazide (OBSH) were used as blowing agents and compared. The cure characteristic, mechanical, morphological, and flammability properties of the foams were investigated. The results indicated an increasing chloroprene rubber loading caused the increase in cure time, but decreased in cure rate index. In both cases of foaming agents, the cellular rubbers were found that tensile and tear strength were decreased with CR rubber loading, but the secant modulus and hardness were increased. Compression set was decreased with CR rubber loading. It is also showed that the flammability of NR/CR foam with high CR contents (more than 80%) was better than that with low CR contents. It is also found that using OBSH as foaming agent can produce cellular rubber containing better cell density and cell size distribution than ADC.

Cost-effective External Keel SACH Foot for Syme’s Prosthesis

Abstract Background: The prosthetic management of Syme’s amputation is a challenge when it comes to the attachment of SACH foot. SACH foot is made up of small narrow wooden keel which is covered by soft flexible sponge rubber therefore it is difficult to attach SACH foot directly to the Syme’s socket. Moreover, there is no rigid structure of the SACH foot available for bonding with the laminated socket considering the Syme’s amputee. Aim: This new design of prosthetic foot provide easy attachment to the Syme’s socket, thus helping in the prosthetic management of Syme’s amputation. Methodology: We have developed this Syme’s prosthetic foot with polyurethane rigid foam block, balata cloth, high-density Ethaflex, wooden block, and microcellular rubber. The design and dimensions of the prosthetic foot were decided such that it helps in easy attachment to the Syme’s prosthesis. Results: The attachment of this new Syme’s foot to the laminated socket has made the fabrication procedure of the Syme’s prosthesis more easy. The amputee also should improvement in cadence and more natural gait with this design. Conclusion: The Syme’s foot design provides natural gait in addition to the reduction of energy expenditure. This foot can also be used for transtibial prosthesis in addition to Syme’s prosthesis.

An experimental study on the vibration behavior and the physical properties of weft-knitted spacer fabrics manufactured using flat knitting technology

Weft-knitted spacer fabrics, a kind of three-dimensional fabric structure, are potential substitutes for typical rubber sponges and polyurethane foams for the protection of human body from exposure to vibrations. To explore the capability and the designability of weft-knitted spacer fabrics as the functional material of personal protective equipment against vibration, such as anti-vibration gloves and car cushions, the vibration behavior and physical properties of weft-knitted spacer fabrics manufactured using flat knitting technology were studied. In the first part of the article, the vibration behavior of top-loaded weft-knitted spacer fabric under harmonic base excitation was analyzed. The effects of monofilament diameter, linking distance and excitation acceleration level on the transmissibility curve of the mass-spacer fabric were evaluated. It was shown that to broaden the frequency range for vibration isolation, spacer fabrics with smaller monofilament diameter and longer linking distance were preferred. In the second part of the article, the effects of monofilament type, monofilament diameter, and spacer structure on the physical properties of spacer fabric including fabric shrinkage coefficient, fabric thickness, fabric stitch densities, and fabric areal mass were analyzed. It was found that fabric thickness was increased by employing spacer structures with longer linking distance and lower filling density of spacer monofilament. In addition, in order to obtain an optimized high fabric thickness, nylon monofilament was preferred to polyester monofilament. On the other hand, monofilament diameter has a significant influence on stitch densities and fabric areal mass. Larger monofilament diameter resulted in lower stitch densities and heavier areal mass for spacer fabric.

Energy absorption capacity of rubber sponge reinforcement in carbon fiber reinforced plastics (CFRP) tubes

This research aimed to study and experimentally determine the energy absorption capacity of rubber-reinforced carbon fiber tubes under axial load and crossover impact at angles [0/90] and [45/-45]. Rubber sponge was added at a density of 100 kg/m3. The specimens had a diameter of 42.58–48.24 mm depending on the thickness of the carbon fiber layer while the length was 100 mm. A hammer head velocity of 5.94 m/s was used at the point of impact and compared with modeling by FEA method. The results showed that there were 2 types of specimen damage: Type 1 was split and flared damage which was found in the group of laying fiber at angle [0/90], and this was further divided into 2 parts: collapse inward of the pipe and flare outward of the pipe. Type 2 damage occurred as a split and flared damage in shear force in the fiber at angle [45/-45]. In terms of maximum load and average load, it was found that the angle of fiber [45/-45]2 with rubber sponge reinforcement could reduce the maximum load better than the non-reinforced one by 41.13%. The energy absorption of the [45/-45]2 pipes were better than the others. The analysis of the FEA model found that the damage pattern and the resulting load tended to be in the same direction as the experiment and the damage of the weave in each layer could be observed as well.

Removal of collagen three-dimensional scaffold bubbles utilizing a vacuum suction technique.

The process of generating type I/II collagen scaffolds is fraught with bubble formation, which can interfere with the three-dimensional structure of the scaffold. Herein, we applied low-temperature vacuum freeze-drying to remove mixed air bubbles under negative pressure. Type I and II rubber sponges were acid-solubilized via acid lysis and enzymolysis. Thereafter, vacuum negative pressure was applied to remove bubbles, and the cover glass press method was applied to shape the type I/II original scaffold. Vacuum negative pressure was applied for a second time to remove any residual bubbles. Subsequent application of carbamide/N-hydroxysuccinimide cross-linked the scaffold. The traditional method was used as the control group. The structure and number of residual bubbles and pore sizes of the two scaffolds were compared. Based on the relationship between the pressure and the number of residual bubbles, a curve was created, and the time of ice formation was calculated. The bubble content of the experimental group was significantly lower than that of the control group (P < 0.05). The pore diameter of the type I/II collagen scaffold was higher in the experimental group than in the control group. The time of icing effect of type I and II collagen solution was 136.54 ± 5.26 and 144.40 ± 6.45s, respectively. The experimental scaffold had a more regular structure with actively proliferating chondrocytes that possessed adherent pseudopodia. The findings indicated that the vacuum negative pressure method did not affect the physical or chemical properties of collagen, and these scaffolds exhibited good biocompatibility with chondrocytes.

Polydopamine-Coated Natural Rubber Sponge for Highly Efficient Vapor Generation.

The global water crisis is becoming more and more serious, and solar steam generation has recently been investigated for clean water production and wastewater treatment. However, the efficiency of solar vapor transfer is still low. It is a great challenge to find photothermal materials which simultaneously have high energy transfer efficiency, facile production, and are low cost. To address this, we propose a method which is simple, low cost and suitable for large-scale preparation to fabricate the photothermal materials based on using recycled natural rubber sponge (NRS) coated with polydopamine (PDA). X-ray photoelectron spectroscopy analysis confirmed that when the PDA coated the surface of the NRS, the hydrophilicity of the sponge was significantly improved. Scanning electron microscopy characterization showed that the PDA-coated natural rubber sponge (PNRS) maintained the porous 3D skeleton of the pristine sponge. As a result, PNRS exhibits excellent photothermal properties, a very high evaporation rate of 1.35 kg m−2 h−1, and an energy transfer efficiency of 84.6% can be achieved under a light intensity of 1 sun (1 kW m−2). It is worth noting that the vapor generation of PNRS is still at a high level with 1.06 and 1.09 kg m−2 h−1 in the corrosive liquids of 1 M H2SO4 and 0.5 M NaOH, respectively. The photothermal materials based on using recycled NRS have good application prospects in seawater desalination and the purification of wastewater, which also provides a new method for the recycling of waste NRS.

Multifunctional conductive graphite/cellulosic microfiber-natural rubber composite sponge with ultrasensitive collision-warning and fire-waring

• GP/CMF-NR sponge was prepared by a combined strategy of freeze and vulcanization. • The existence of CMF could improve the deposition and agglomeration of GP in NRL. • GP/CMF-NR sponge could be applied for human motion detection and collision warning. • GP/CMF-NR sponge triggered the fire-warning within 1.2 s when encountering fire. Design and development of the conductive polymer composite sponges with multifunctionality are urgently needed to expand and meet their application in multiple fields. Herein, we proposed an ingenious strategy to fabricate the graphite (GP)/cellulosicmicrofiber (CMF)-natural rubber (NR) composite sponges though freezing at low temperature (to build the skeleton structure of sponge) and vulcanizing at high temperature (to form the pores and fix the skeleton structure of sponge). Meanwhile, the incorporation of CMF can help GP to disperse uniformly in NRL and form an entire conductive network. As results shown, GP/CMF-NR composite sponge exhibits the excellent compressive property and electrical conductivity due to the good elasticity of NR and the support strength of CMF. Significantly, GP/CMF-NR composite sponge has been successfully used as a piezoresistive sensor to detect human motions (such as fingers/wrists/elbows/knees movement), and GP/CMF-NR composite sponge also can be used as a collision warning sensor to warn the collision in a moment and protect the things from damage at some extent. More importantly, when being attacked by fires, GP/CMF-NR sponge also can be used as a fire-warning sensor with the sensitive fire-warning response time, which triggered a fire-warning lamp within 1.2 s. This investigation provides a convenient and environmentally friendly strategy for fabricating conductive natur rubber sponges and has promising applications in the field of piezoresistive sensors and fire-warning sensors.

Enhancement of the thermal and physicochemical properties of styrene butadiene rubber composite foam using nanoparticle fillers and electron beam radiation

Abstract This study investigates the physicochemical and thermal properties of styrene–butadiene rubber (SBR) nanocomposite foam. Nano-calcium carbonate (CaCO3) was prepared from eggshells (ESs) waste. Sponge rubber nanocomposites were prepared and were irradiated by electron beam (EB) radiation at 25, 75, and 150 kGy. Their physicochemical properties, including foam density, compression set (CS), hardness, abrasion loss, and expansion ratio, and their thermal stability were investigated. The physicochemical properties were enhanced by adding 2.5 phr of a foaming agent. Among the composites examined, the foam composites containing nano-CaCO3 had the lowest CS, abrasion loss, and expansion ratio and the highest hardness and foam density. The results confirmed that the thermal stability was improved by incorporating nano-CaCO3 into the SBR foam and as the radiation dose increased. The sponge containing nanoclay demonstrated an intermediate behavior, whereas that with CaCO3 nanoparticles showed low average cell diameter and size and high cell wall thickness. The radiation process enhanced the foam density, CS, abrasion loss, hardness, and thermal property of the developed nanocomposites by inducing the formation of intermolecular crosslinks within the composite matrix. The results showed that physicochemical properties improved by increasing the radiation dose at 25 kGy.

ADVANCES IN TECHNIQUES AND APPLICATIONS OF RUBBER SURFACE GRAFTING MODIFICATION

ABSTRACT To meet the requirement in the application of medical devices, composites, biomaterials, corrosion resistance, and selective adsorptions, rubber surface modification is usually indispensable. Grafting treatment is one of most significate treatment methods. In this paper, we focus on rubber surface grafting modification, including grafting techniques and applications. Different grafting methods—including monomer grafting polymerization and coupling reaction—are covered and compared briefly. The related applications of surface grafting modification techniques, such as improving compatibility of waste rubber as fillers, hydrophobicity and lipophilicity of sponge rubber for oil–water separation, biocompatibility of rubber in the medical field, and forming surface patterns, are demonstrated in detail. The new research directions of surface grafting techniques as well as main challenges in application are also discussed.

An Experimental Investigation of a Rubber Sponge Padded Motorcycle Helmet Subjected to Impact

This research has aimed to improve the impact absorption capacity of motorcycle helmet by installing rubber sponge pads underneath its comfort foam. Three types of Thai commercial helmets have been used in this study, namely the Shorty, Open-face and Full-face. A number of off-the-shelf helmets and padded-helmets have been us as experimental specimens. The thicknesses of the rubber sponge pads have been 1.0 cm and 1.6 cm and they have been installed to the helmets with two different patterns, i.e. Full Area (FA) and Oregon Aero (OA). Two series of test, the impact and the drop test, have been carried out. Time-histories of the transmitted load and of acceleration have been considered. The peak load, the peak acceleration, and the HIC have been investigated and discussed. The experimental results have indicated that the padding technique could significantly improve the impact absorption capacity of the helmet. The maximum peak load reduction has been 55.21% in the case of the padded-helmet at the at impact height of 1.2 m. However, the peak load reduction has decreased with an increase in the impact height. The values of the peak acceleration and the HIC of commercial helmets have been found to exceed the standard value of ECE22.05, particularly for the Shorty helmet. By padding the helmet with a rubber sponge, the peak acceleration and the HIC have been also significantly decreased. The highest reduction of peak acceleration and the HIC were approximately 70% for the Shorty with 1.6 cm pad. In the case of the Open-face and the Full-face, the reductions have ranged in between approximately 12-35%. In addition, this study has revealed that the influence of rubber sponge thickness has been more prominent than the one of the pad patterns. Therefore, the OA pattern may be preferable since it is lighter and uses less material.

Cross‐linking and foaming behavior of elastomers with water based blowing agents

AbstractPhysiologically hazardous chemical blowing agents are state of the art for the foaming of extruded rubber profiles. Water is a potential alternative to these blowing agents and is incorporated into rubber compounds in the form of water‐loaded hygroscopic substances such silica or hydrates. To achieve an optimum foaming result, the water desorption and cross‐linking reaction has to be coordinated. Studies of the foaming behavior in the salt bath of the Sponge Rubber Analyzer show, that the density of an ethylene propylene diene monomer (EPDM) rubber compound is reduced to about 60% and a nitrile butadiene rubber (NBR) compound to approximately 70%. The low reference densities of chemically foamed EPDM of 30% and NBR of 45% are not achieved. This is attributed to the premature foaming when using water‐loaded silica as blowing agent. Due to the low resistance of the rubber matrix, large cells are formed by coalescence, which collapse at low cross‐linking densities. Investigations of the cross‐linking behavior of EPDM and NBR with water‐loaded silica as blowing agent state, that the cross‐linking density is reduced to about 65% for EPDM and 50% for NBR when water is present. Furthermore, the incubation time is shortened by inhibition of the CBS retarder in the cross‐linking system of the NBR. However, this is not sufficient to fix the foamed cells.

Impact of foaming agent and nanoparticle fillers on the properties of irradiated rubber

Abstract A sponge rubber nanocomposite based on styrene–butadiene rubber (SBR)/nanoclay (montmorillonite, MMT) or nano-calcium carbonate (CaCO3) fillers with various foaming agent contents was produced by a simple technique, roll milling. The nanoparticles were examined by different techniques, such as X-ray fluorescence (XRF), X-ray diffraction (XRD), energy dispersive X-ray analysis (EDX), transmission electron microscopy (TEM), and Fourier-transform infrared (FT–IR). The sponge rubber nanocomposites were characterized by scanning electron microscopy (SEM) image analysis before and after exposures to radiation doses, as well as by the XRD patterns for the unirradiated samples. The different properties of the obtained nanocomposites, including their foaming degree, tensile strength, elongation at break, and thermal conductivity, were also investigated. The foam composites containing nano-CaCO3 possessed the best cell and crosslinking densities and mechanical properties among the other composites, while its foaming degree was the lowest. The results indicated that the thermal conductivity was reduced by increasing the foaming agent concentration. However, it increased as the radiation dose increased, and the optimum radiation dose was obtained at 75 kGy. The foam containing MMT exhibited an intermediate behavior while high thermal conductivity was recorded for the foam containing the CaCO3 nanoparticles.

Foamability of Natural rubber (NR)/Poly(butylenes adipate-co-terephthalate) (PBAT) Thermoplastic Vulcanizate with OBSH as a blowing agent

Natural rubber, NR, is bio-based material that is generally used for foam preparation as it results in good softness and high resilience. Among many applications, NR foam/sponge is often used for shoe sole either insole or outsole. Likewise, rubber sponge is very important for healing Plantar Fasciitis as rubber sponge is soft, elastic and capable in impact absorption. NR is in fact non-biodegradable resulting in increasing of waste which is a hot issue at present. Huge interest has paid attention in using biodegradable polymer in various products and applications. Polybutylene adipate-co-terephthalate, PBAT, is one of many bioplastics that possesses biodegradability characteristic. It also shows excellent flexibility similar to elastomer. Many attempts have been focus on blending this polymer to improve toughness in brittle plastic. Our research is aimed to incorporate PBAT into NR and producing thermoplastic vulcanizate. NR/PBAT TPV foam is then produced using 4,4-’Oxybis-benzenesulfonyl hydrazide (OBSH) as a blowing agent. The ratios of NR/PBAT are varied as follow: 70/30 65/35 60/40 55/45 50/50 45/55. The polymer blends were mixed on a two-roll mill with the formulation of ZnO 3 phr, luperox 101 1 phr and OBSH 10 phr. Compression molding was used in order to prepare rubber sponge at 160 °C, 1500 psi. Cell size, cell size distribution, density and compression set of NR/PBAT foam were investigated.

Research and Development of the First Generation of Multifunctional Home Fitness Recliner

The first generation of multifunctional home fitness recliners is a kind of home-use portable fitness equipment that coexists with multiple functions and can be easily adjusted for strength. The fitness equipment adopts the bionic “fish-shaped” design, and uses the principle of morphological bionics to achieve the simplicity required by design and meet today’s aesthetics. While improving the aesthetics of the design equipment, it also meets the requirements of ergonomics, thereby improving the user’s sports experience. The device uses polyformaldehyde plastic, ABS plastic, shell ABS plastic (natural plastic in the groove), polyamide fiber, PVC artificial leather, plywood, sponge, rubber sponge and other plastic materials that meet national standards. 35 # steel, cold rolled steel rectangular tube, spring steel, tungsten steel and other materials that meet various technical indicators. Under the premise of safe use of equipment, multiple exercise uses can be realized.

Preparation of UiO-66-NH2 and UiO-66-NH2/sponge for adsorption of 2,4-dichlorophenoxyacetic acid in water.

MOFs are usually used as efficient adsorbents to remove specific pollutants in water. However, because of their poor water stability relatively small particle size, their application in adsorbing and removing pollutants from water is limited. In this paper, with nitrile rubber sponge as the substrate, UiO-66-NH2/sponge composites were firstly in-situ synthesized and systematically evaluated UiO-66-NH2 as an adsorbent to remove 2,4-dichlorophenoxyacetic acid from water. This composite could not only remain the adsorption capacity for 2,4-dichlorophenoxyacetic acid of UiO-66-NH2, but also was much more convenient for separation after the adsorption compared to UiO-66-NH2. In addition, the mechanism of the adsorption of UiO-66-NH2 for 2,4-dichlorophenoxyacetic acid were discussed in detail. Electrostatic interaction between UiO-66-NH2 and 2,4-dichlorophenoxyacetic acid was the main adsorption mechanism. The adsorption was mainly suitable for Langmuir isotherm models, and its maximum adsorption capacity of 2,4-dichlorophenoxyacetic acid was 72.99mgg-1.