The electrospinning process of waste old polystyrene foamed plastic
Technical field
The present invention relates to a kind of electrospinning process of waste and old polystyrol foamed plastic, particularly relate to a kind of natural botanical extraction liquid that utilizes and the waste and old polystyrol foamed plastic is dissolved into solution, add the specific function material then and utilize electrostatic spinning technique to spin electrospinning process with waste old polystyrene foamed plastic of nanometer stage material as solvent.
Background technology
Polystyrene foam plastics is applied in the every field as a kind of packaging material usually because of having characteristics such as big, the in light weight and proportion of volume is little, but the shortcoming of this material is not decompose, thus with the back if it is discarded contaminated environment seriously.At present the recovery method major part of waste old polystyrene foamed plastic all is to utilize organic solvent its dissolving to be prepared the material of other purposes such as coating, because the organic solvent that this recovery method uses can bring secondary pollution to environment, so be unfavorable for promoting.Therefore seek that a kind of can not cause secondary pollution and waste old polystyrene foamed plastic recovery method easy and simple to handle be the direction that the research worker makes great efforts always.
Summary of the invention
In order to address the above problem, the object of the present invention is to provide a kind of with natural botanical extraction liquid as solvent, thereby can not cause secondary pollution, and the electrospinning process of waste old polystyrene foamed plastic easy and simple to handle to environment.
In order to achieve the above object, the electrospinning process of waste old polystyrene foamed plastic provided by the invention comprises:
(1) will be through the polystyrene foam plastics pulverized and d-citrene with 91~53: 9~47 weight ratio be mixed at normal temperatures and polystyrene foam plastics is dissolved into the clear solution of thickness;
(2) above-mentioned soln using electrostatic spinning apparatus is made the styroflex that diameter is 400nm~3.0 μ m, or added the specific function material, and utilize electrostatic spinning apparatus to make the special fibre of diameter for 400nm~3.0 μ m at above-mentioned solution.
Described specific function material comprises radar wave absorbing agent, carbon black, SnO
2, TiO
2Or porous silicon.
The dissolution time of described polystyrene foam plastics is 1~20 minute.
Described d-citrene is 100% concentrate.
Described electrostatic spinning voltage is 15KV~24KV, and receiving range is 4cm~15cm.
The electrospinning process of waste old polystyrene foamed plastic provided by the invention is to utilize the d-citrene concentrate extract from natural plants to dissolve waste old polystyrene foamed plastic as solvent, adds the specific function material then in this solution and makes the fiber that diameter is 400nm~3.0 μ m.Owing to the d-citrene is to extract to make from plants such as citrus and sour jujube Jie fringe, thereby its source is abundant, and this solvent has Natural Degradation, thereby to environment and body harmless, so can not cause secondary pollution to environment.In addition, the present invention also has and can keep original mechanical strength of polystyrene and advantage such as easy and simple to handle.
The specific embodiment
Be elaborated below in conjunction with the electrospinning process of specific embodiment to waste old polystyrene foamed plastic provided by the invention.
Embodiment 1
To mix at normal temperatures with 85: 15 weight ratio and polystyrene foam plastics will be dissolved into the clear solution of thickness through the polystyrene foam plastics pulverized and d-citrene, dissolution time is 2 minutes, then above-mentioned solution is joined in the electrostatic spinning apparatus, and be 20KV at voltage, and receiving range is to make the polystyrene non-woven fibre that diameter is 400nm under the condition of 5cm, and this fiber can be used as the raw material of filter membranes such as medical science, biotechnology and industrial wastewater.
Embodiment 2
To mix at normal temperatures with 85: 15 weight ratio and polystyrene foam plastics will be dissolved into the clear solution of thickness through the polystyrene foam plastics pulverized and d-citrene, dissolution time is 2 minutes, in above-mentioned solution, add radar wave absorbing agent then, and be 20KV at voltage, and receiving range is to utilize electrostatic spinning apparatus to make diameter under the condition of 5cm to absorb nanofiber for the radar wave of 500nm.The electrical conductivity of this fiber is 10
-3~10
-1S/cm, its millimeter wave to 26.5~40GHz has absorption preferably, and mechanism is similar to the electrical loss type.
Embodiment 3
To mix at normal temperatures with 75: 25 weight ratio and polystyrene foam plastics is dissolved into the clear solution of thickness through the polystyrene foam plastics pulverized and d-citrene, dissolution time be 6 minutes, adds carbon black, SnO then in above-mentioned solution
2Or TiO
2In any conductive material, and be 20KV, and receiving range is to utilize electrostatic spinning apparatus to make the conductive fiber of diameter about for 600nm under the condition of 5cm at voltage.This conductive fiber can be used as semiconductor devices, electromagnetic wave shielding and antistatic material.
Embodiment 4
To mix at normal temperatures with 60: 40 weight ratio and polystyrene foam plastics will be dissolved into the clear solution of thickness through the polystyrene foam plastics pulverized and d-citrene, dissolution time is 20 minutes, in above-mentioned solution, add porous silica material then, and be 20KV at voltage, and receiving range is to utilize electrostatic spinning apparatus to make the non-electric light source nanofiber of diameter for 800nm under the condition of 5cm.This light source nanofiber can be used as sensing element, sensor and illuminating material.
The solvent that the present invention uses is the d-citrene concentrate of 100% concentration extracted from natural plants, and this solution can be used as food additives and uses, as the spices of orange flavor carbonated drink or chewing gum etc., and also can replace organic solvent etc.Detect the small white mouse LD of this solvent through the diseases prevention and control center
50>5.0g/kgBW belongs to actual nontoxic, so it belongs to the environment-friendly type solvent, thereby to human body and environmentally friendly.In addition, because the citrene molecular structure in this solvent is similar to the polystyrene molecular structure, and solubility parameter is close, thereby it at room temperature just can be dissolved into the polystyrene foam plastics after pulverizing the clear solution of thickness, and dissolution velocity is identical with organic solvent toluene and benzene, and prove that by technology for detection this solvent does not change the molecular weight and the molecular weight distribution of polystyrene, promptly can keep the original mechanical strength of polystyrene.In addition, utilize this natural solvent to come replace organic solvent not only can solve " white pollution " problem that polystyrene foam plastics itself forms, but also can solve the secondary pollution problem that causes with organic solvent processing polystyrene foam plastics, and be difficult to reach for present traditional solution electrostatic spinning technique without organic solvent processing polystyrene foam plastics.The nanofiber made from electrospinning process provided by the invention has bigger specific area and surface-to-volume ratio, this fiber has the absorption affinity of very strong bearing certain pressure and good filterability, barrier, cohesiveness and heat insulating ability, therefore can be applicable to the aspects such as filtration of submicron particle, its filter effect can improve greatly than the conventional filtration material efficiency.