CN112726018B - Preparation method of oil-water separation material based on PP non-woven fabric - Google Patents
Preparation method of oil-water separation material based on PP non-woven fabric Download PDFInfo
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
- D04H1/4282—Addition polymers
- D04H1/4291—Olefin series
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
- B01D17/08—Thickening liquid suspensions by filtration
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/54—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving
- D04H1/56—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving in association with fibre formation, e.g. immediately following extrusion of staple fibres
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- D06C—FINISHING, DRESSING, TENTERING OR STRETCHING TEXTILE FABRICS
- D06C23/00—Making patterns or designs on fabrics
- D06C23/04—Making patterns or designs on fabrics by shrinking, embossing, moiréing, or crêping
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- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
- D06M13/50—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with organometallic compounds; with organic compounds containing boron, silicon, selenium or tellurium atoms
- D06M13/51—Compounds with at least one carbon-metal or carbon-boron, carbon-silicon, carbon-selenium, or carbon-tellurium bond
- D06M13/513—Compounds with at least one carbon-metal or carbon-boron, carbon-silicon, carbon-selenium, or carbon-tellurium bond with at least one carbon-silicon bond
- D06M13/517—Compounds with at least one carbon-metal or carbon-boron, carbon-silicon, carbon-selenium, or carbon-tellurium bond with at least one carbon-silicon bond containing silicon-halogen bonds
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- D06M2101/00—Chemical constitution of the fibres, threads, yarns, fabrics or fibrous goods made from such materials, to be treated
- D06M2101/16—Synthetic fibres, other than mineral fibres
- D06M2101/18—Synthetic fibres consisting of macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D06M2101/20—Polyalkenes, polymers or copolymers of compounds with alkenyl groups bonded to aromatic groups
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Abstract
本发明提供了一种基于PP无纺布的油水分离材料的制备方法，利用熔喷非织造布技术制备PP无纺布，将水溶性高分子PEO均匀洒在上述PP无纺布上，通过真空热压进行复合加固制备无纺布膜；将加固后的无纺布膜置于去离子水中，通过超声将水溶性高分子PEO除去；将得到的无纺布与不锈钢筛网热压印构筑表面微‑纳结构，并利用氟硅烷对表面进行疏水处理即得到高效能的油水分离材料。本发明基于熔喷无纺布制备油水分离材料，成本低，不涉及化学试剂，绿色环保；主要利用熔喷、热压和超声技术，工艺简单、效能高。利用氟硅烷对无纺布表面进行喷涂处理，有利于降低无纺布的表面自由能，进一步提高疏水性能和对液体的选择性，促进油水分离效能的提高。
The invention provides a preparation method of an oil-water separation material based on PP non-woven fabric. The PP non-woven fabric is prepared by using the melt-blown non-woven fabric technology, and the water-soluble polymer PEO is evenly sprinkled on the above-mentioned PP non-woven fabric. The non-woven membrane is prepared by composite reinforcement by hot pressing; the reinforced non-woven membrane is placed in deionized water, and the water-soluble polymer PEO is removed by ultrasound; the obtained non-woven fabric and stainless steel mesh are hot-pressed to construct the surface Micro-nano structure, and hydrophobic treatment of the surface with fluorosilane to obtain a high-efficiency oil-water separation material. The invention prepares oil-water separation materials based on melt-blown non-woven fabrics, has low cost, does not involve chemical reagents, and is environmentally friendly; mainly uses melt-blown, hot-pressing and ultrasonic technologies, and has simple process and high efficiency. The use of fluorosilane to spray the surface of the non-woven fabric is beneficial to reduce the surface free energy of the non-woven fabric, further improve the hydrophobic property and the selectivity to liquid, and promote the improvement of oil-water separation efficiency.
Description
技术领域technical field
本发明涉及过滤材料，具体涉及用于油水分离领域的基于PP无纺布的油水分离材料的制备方法。The invention relates to a filter material, in particular to a preparation method of an oil-water separation material based on PP non-woven fabric used in the field of oil-water separation.
背景技术Background technique
当前，海上原油泄漏以及工业废水排放已成为人们广泛关注的重大环境问题，不仅造成海洋资源的破坏和浪费，也引起水污染，加重水资源危机。如何快速又高效地对海洋原油泄漏以及工业油性污水进行治理亟待解决。目前，处理油污染的方法主要包括燃烧法、吸附法、化学法、生物氧化法等。在这些方法中，吸附法是最简单可行的方法，被广泛应用于治理油泄漏和有机试剂排放造成的污染。然而传统的吸附材料尽管为油品或者有机试剂提供了一定的存储空间，但是界面浸润性不明显，对于液体的吸附缺乏选择性，分离效率较低，并且对后续油品的回收造成了阻碍。因此，开发出性能优良的油水分离材料仍然是亟需解决的问题。过滤型油水分离材料能高效进行油水分离，具有优异的综合性能，但存在成本高、制备过程复杂、不环保等缺点。本发明旨在提供一种制备高性能油水分离材料的方法，实现油水分离材料的简单、低成本、绿色制备。At present, the leakage of crude oil at sea and the discharge of industrial wastewater have become major environmental problems of widespread concern, which not only cause the destruction and waste of marine resources, but also cause water pollution and aggravate the water resources crisis. How to quickly and efficiently treat marine crude oil spills and industrial oily sewage needs to be solved urgently. At present, the methods of dealing with oil pollution mainly include combustion method, adsorption method, chemical method, biological oxidation method, etc. Among these methods, the adsorption method is the most simple and feasible method, and is widely used in the treatment of pollution caused by oil spills and organic reagent discharges. However, although the traditional adsorption materials provide a certain storage space for oil or organic reagents, the interface wettability is not obvious, the liquid adsorption lacks selectivity, the separation efficiency is low, and the subsequent oil recovery is hindered. Therefore, the development of oil-water separation materials with excellent performance is still an urgent problem to be solved. Filtration-type oil-water separation materials can efficiently separate oil-water and have excellent comprehensive performance, but have disadvantages such as high cost, complicated preparation process, and unenvironmental protection. The present invention aims to provide a method for preparing a high-performance oil-water separation material, so as to realize simple, low-cost and green preparation of the oil-water separation material.
熔喷非织造技术是高效制备熔喷无纺布的重要手段，工艺流程短、生产效率高。熔喷无纺布具有纤维超细、比表面积大、孔隙率高等特点，在过滤材料领域具有独特的优势。然而，熔喷无纺布作为过滤材料抗拉、抗压、耐磨等力学性能不足，分离效率较低，无法同时兼具高过滤效率与低阻等问题。Meltblown nonwoven technology is an important means to efficiently prepare meltblown nonwovens, with short process flow and high production efficiency. Meltblown non-woven fabrics have the characteristics of ultra-fine fibers, large specific surface area and high porosity, and have unique advantages in the field of filter materials. However, as a filter material, melt-blown non-woven fabrics have insufficient mechanical properties such as tensile, compressive, and wear-resistant properties, and have low separation efficiency, making it impossible to have both high filtration efficiency and low resistance.
鉴于此，本发明基于熔喷无纺布在过滤行业的优势，提供一种简单制备油水分离材料的方法。In view of this, the present invention provides a simple method for preparing oil-water separation material based on the advantages of melt-blown non-woven fabrics in the filtration industry.
发明内容SUMMARY OF THE INVENTION
针对现有技术中存在的问题，本发明提供一种基于PP无纺布的油水分离材料的制备方法，该制备工艺流程简单，工艺过程绿色环保、设备要求低，所制备的油水分离材料具有较好的亲油疏水性和机械性能。不仅可以解决原油泄漏和污水排放的问题，缓解企业和环境压力，也有望较大程度地替代一些传统的过滤材料广泛地应用于相关行业。In view of the problems existing in the prior art, the present invention provides a method for preparing an oil-water separation material based on PP non-woven fabric. Good lipophilic hydrophobicity and mechanical properties. It can not only solve the problems of crude oil leakage and sewage discharge, relieve the pressure on enterprises and the environment, but also can replace some traditional filter materials to a large extent and be widely used in related industries.
为解决上述技术问题，本发明采用以下技术方案：In order to solve the above-mentioned technical problems, the present invention adopts the following technical solutions:
一种基于PP无纺布的油水分离材料的制备方法，步骤如下：A preparation method of an oil-water separation material based on PP non-woven fabric, the steps are as follows:
（1）熔喷PP无纺布：利用熔喷非织造布技术制备PP无纺布；(1) Melt-blown PP non-woven fabric: PP non-woven fabric is prepared by melt-blown non-woven fabric technology;
（2）热压加固：将一定质量的水溶性高分子PEO均匀洒在上述PP无纺布上，通过真空压机进行热压加固；(2) Hot-pressing reinforcement: A certain quality of water-soluble polymer PEO is evenly sprinkled on the above PP non-woven fabric, and hot-pressed reinforcement is performed by a vacuum press;
（3）超声溶去：将上述加固后的无纺布膜置于去离子水中，通过超声的方法将水溶性高分子PEO除去；(3) Ultrasonic dissolving: placing the reinforced non-woven membrane in deionized water, and removing the water-soluble polymer PEO by ultrasonic;
（4）热压印表面微结构：将（3）中制备的无纺布与不锈钢筛网热压印构筑表面微-纳结构；(4) Hot embossing surface microstructure: The surface micro-nanostructure was constructed by hot embossing the non-woven fabric prepared in (3) and stainless steel mesh;
（5）表面疏水处理：利用氟硅烷对（4）中无纺布进行表面喷涂处理降低表面能。(5) Surface hydrophobic treatment: use fluorosilane to spray the surface of the non-woven fabric in (4) to reduce the surface energy.
进一步，所述步骤（1）中的无纺布通过熔喷纺丝技术制备，无纺布的厚度为0.5-2mm。Further, the non-woven fabric in the step (1) is prepared by melt-blown spinning technology, and the thickness of the non-woven fabric is 0.5-2 mm.
进一步，所述步骤（2）中水溶性高分子PEO为结晶性高分子，水溶性高分子PEO的用量为PP无纺布质量的10%-50%。Further, in the step (2), the water-soluble polymer PEO is a crystalline polymer, and the amount of the water-soluble polymer PEO is 10%-50% of the mass of the PP non-woven fabric.
进一步，所述步骤（2）中热压加固的工艺条件：热压温度为110-125℃，热压压力为1500 KG，预热时间20min，热压时间3min，开模温度60℃。Further, the process conditions for hot-pressing reinforcement in the step (2): the hot-pressing temperature is 110-125°C, the hot-pressing pressure is 1500 KG, the preheating time is 20min, the hot-pressing time is 3min, and the mold opening temperature is 60°C.
进一步，所述步骤（3）中超声溶去的工艺是将加固后的无纺布置于去离子水中，在30℃的条件下超声4-6h，每0.5h更换一次去离子水。Further, in the process of ultrasonic dissolving in the step (3), the reinforced non-woven fabric is placed in deionized water, ultrasonicated for 4-6 hours at 30°C, and the deionized water is replaced every 0.5 hours.
进一步，所述步骤（4）中热压印的工艺条件为：热压温度为135-145℃，热压压力500-2000kg，预热时间5-10 min，热压时间为3-5 min，开模温度为90-100℃。Further, the process conditions of the hot embossing in the step (4) are: the hot pressing temperature is 135-145 ℃, the hot pressing pressure is 500-2000 kg, the preheating time is 5-10 min, the hot pressing time is 3-5 min, The mold opening temperature is 90-100℃.
进一步，所述步骤（5）中氟硅烷喷涂时间为3-5 s，干燥温度80-100℃。Further, in the step (5), the fluorosilane spraying time is 3-5 s, and the drying temperature is 80-100°C.
本发明的有益效果：（1）本发明基于熔喷无纺布制备油水分离材料，成本低，不涉及化学试剂，绿色环保；主要利用熔喷、热压和超声技术，工艺简单、效能高；（2）通过热压工艺将PEO与PP无纺布复合，促进PEO和PP分子链的重排结晶，有利于提高无纺布的结构稳定性和机械性能。此外，PEO是高结晶性聚合物，热压过程中形成较多片晶，对无纺布结构稳定性和机械性能的提高有促进作用。（3）通过超声的方法将PEO分子除去，确保无纺布的多孔结构不受影响，PEO晶片由于具有较高的稳定性残留在PP无纺布中，提高了无纺布的力学性能和结构稳定性。（4）通过热压印工艺在无纺布表面构筑微米级结构，这些微米级结构和PEO晶片（纳米级）形成了微-纳多尺度结构，有利于无纺布疏水性能的提高；PP无纺布的多孔结构和亲油特性赋予熔喷PP无纺布的亲油特性。（5）利用氟硅烷对无纺布表面进行喷涂处理，有利于降低无纺布的表面自由能，进一步提高疏水性能和对液体的选择性，促进油水分离效能的提高。Beneficial effects of the present invention: (1) The present invention prepares oil-water separation materials based on melt-blown non-woven fabrics, which has low cost, does not involve chemical reagents, and is environmentally friendly; mainly uses melt-blown, hot-pressing and ultrasonic technologies, with simple process and high efficiency; (2) The PEO and PP non-woven fabrics are compounded by the hot pressing process to promote the rearrangement and crystallization of PEO and PP molecular chains, which is beneficial to improve the structural stability and mechanical properties of the non-woven fabrics. In addition, PEO is a highly crystalline polymer, and many platelets are formed during the hot pressing process, which promotes the improvement of the structural stability and mechanical properties of the non-woven fabric. (3) The PEO molecules are removed by ultrasound to ensure that the porous structure of the non-woven fabric is not affected. The PEO wafer remains in the PP non-woven fabric due to its high stability, which improves the mechanical properties and structure of the non-woven fabric. stability. (4) Micro-scale structures are constructed on the surface of non-woven fabrics by hot embossing process. These micro-scale structures and PEO wafers (nano-scale) form a micro-nano multi-scale structure, which is beneficial to the improvement of the hydrophobic properties of non-woven fabrics; PP has no The porous structure and lipophilic properties of the spun fabric endow the lipophilic properties of the meltblown PP non-woven fabric. (5) The use of fluorosilane to spray the surface of the non-woven fabric is beneficial to reduce the surface free energy of the non-woven fabric, further improve the hydrophobic performance and the selectivity to liquid, and promote the improvement of oil-water separation efficiency.
附图说明Description of drawings
图1为实施例1制备得到的基于PP无纺布的油水分离材料的亲油疏水测试结果。Fig. 1 is the lipophilic and hydrophobic test result of the oil-water separation material based on PP non-woven fabric prepared in Example 1.
具体实施方式Detailed ways
下面结合具体实施例，对本发明做进一步说明。应理解，以下实施例仅用于说明本发明而非用于限制本发明的范围，该领域的技术熟练人员可以根据上述发明的内容作出一些非本质的改进和调整。The present invention will be further described below with reference to specific embodiments. It should be understood that the following examples are only used to illustrate the present invention rather than to limit the scope of the present invention, and those skilled in the art can make some non-essential improvements and adjustments according to the content of the above invention.
实施例1Example 1
本实施例的基于PP无纺布的油水分离材料的制备方法，步骤如下：The preparation method of the oil-water separation material based on the PP non-woven fabric of the present embodiment, the steps are as follows:
利用熔喷非织造布技术制备PP无纺布，无纺布的厚度为0.2 mm；将水溶性高分子PEO（无纺布质量的10%）均匀洒在PP无纺布上，通过真空压机进行热压复合，热压温度为115℃，热压压力为1500 KG，预热时间20min，热压时间3min，开模温度60℃；将上述热压加固后的无纺布膜置于30℃去离子水中超声4h，每0.5h更换一次去离子水；将超声后的无纺布与不锈钢筛网通过热压印构筑表面微-纳结构，热压温度为135℃，热压压力2000KG，预热时间8 min，热压时间为3min，开模温度为90℃；利用氟硅烷对无纺布表面进行喷涂3 s进一步降低表面自由能，于80℃真空干燥箱中干燥2h处理。The PP non-woven fabric was prepared by melt-blown non-woven fabric technology. The thickness of the non-woven fabric was 0.2 mm; the water-soluble polymer PEO (10% of the non-woven fabric mass) was evenly sprinkled on the PP non-woven fabric, and passed through a vacuum press. Carry out hot-pressing compounding, the hot-pressing temperature is 115°C, the hot-pressing pressure is 1500 KG, the preheating time is 20min, the hot-pressing time is 3min, and the mold opening temperature is 60°C; the non-woven film after hot-pressing reinforcement is placed at 30°C Ultrasound in deionized water for 4 hours, and replace the deionized water every 0.5 hours; the surface micro-nano structure is constructed by hot embossing of the ultrasonic non-woven fabric and stainless steel mesh. The hot pressing temperature is 135 °C, the hot pressing pressure is 2000KG, and the The heating time was 8 min, the hot pressing time was 3 min, and the mold opening temperature was 90 °C; the surface of the non-woven fabric was sprayed with fluorosilane for 3 s to further reduce the surface free energy, and dried in a vacuum drying oven at 80 °C for 2 h.
本实施例制备得到的基于PP无纺布的油水分离材料的亲油疏水测试结果如图1所示。由图可以看出，熔喷PP无纺布（图1a）的水接触角为118.27o，呈疏水特性，本发明制备的亲油疏水材料（图1b）的水接触角为151.75o，呈超疏水特性，疏水性提高，当溶有蓝色水性颜料的水滴滴落在无纺布后水滴马上滚成圆球（图1c）。将经过热压加固、超声溶去和热压印的PP无纺布卷成直径为3mm的棒材进行吸油测试，结果如图1d，瞬间就将食用油吸附，吸油效果强。The lipophilic and hydrophobic test results of the PP non-woven-based oil-water separation material prepared in this example are shown in FIG. 1 . It can be seen from the figure that the water contact angle of the melt-blown PP non-woven fabric (Fig. 1a) is 118.27 o , which is hydrophobic, and the water contact angle of the lipophilic and hydrophobic material (Fig. 1b) prepared by the present invention is 151.75 o , which is super The hydrophobicity and hydrophobicity are improved. When the water droplets dissolved in the blue water-based pigment drop onto the non-woven fabric, the water droplets immediately roll into a ball (Figure 1c). The PP non-woven fabric that has been hot-pressed, ultrasonically dissolved and hot-stamped was rolled into a bar with a diameter of 3mm for oil absorption test.
实施例2Example 2
本实施例的基于PP无纺布的油水分离材料的制备方法，步骤如下：The preparation method of the oil-water separation material based on the PP non-woven fabric of the present embodiment, the steps are as follows:
利用熔喷非织造布技术制备PP无纺布，无纺布的厚度为0.5 mm；将水溶性高分子PEO（无纺布质量的20%）均匀洒在PP无纺布上，通过真空压机进行热压复合，热压温度为115℃，热压压力为1500 KG，预热时间20min，热压时间3min，开模温度60℃；将上述热压加固后的无纺布膜置于30℃去离子水中超声4h，每0.5h更换一次去离子水；将超声后的无纺布与不锈钢筛网通过热压印构筑表面微-纳结构，热压温度为145℃，热压压力500KG，预热时间8min，热压时间为3min，开模温度为90℃；利用氟硅烷对无纺布表面进行喷涂3 s进一步降低表面自由能，于80℃真空干燥箱中干燥2h处理。The PP non-woven fabric was prepared by melt-blown non-woven fabric technology. The thickness of the non-woven fabric was 0.5 mm; the water-soluble polymer PEO (20% of the non-woven fabric mass) was evenly sprinkled on the PP non-woven fabric, and passed through a vacuum press. Carry out hot-pressing compounding, the hot-pressing temperature is 115°C, the hot-pressing pressure is 1500 KG, the preheating time is 20min, the hot-pressing time is 3min, and the mold opening temperature is 60°C; the non-woven film after hot-pressing reinforcement is placed at 30°C Ultrasound in deionized water for 4 hours, and replace the deionized water every 0.5 hours; the ultrasonicated non-woven fabric and stainless steel mesh are subjected to hot embossing to build a surface micro-nano structure. The hot pressing temperature is 145 °C, the hot pressing pressure is 500KG, and the The heating time was 8 min, the hot pressing time was 3 min, and the mold opening temperature was 90 °C; the surface of the non-woven fabric was sprayed with fluorosilane for 3 s to further reduce the surface free energy, and dried in a vacuum drying oven at 80 °C for 2 h.
实施例3Example 3
本实施例的基于PP无纺布的油水分离材料的制备方法，步骤如下：The preparation method of the oil-water separation material based on the PP non-woven fabric of the present embodiment, the steps are as follows:
利用熔喷非织造布技术制备PP无纺布，无纺布的厚度为2 mm；将水溶性高分子PEO（无纺布质量的50%）均匀洒在PP无纺布上，通过真空压机进行热压复合，热压温度为115℃，热压压力为1500 KG，预热时间20min，热压时间3min，开模温度60℃；将上述热压加固后的无纺布膜置于30℃去离子水中超声6h，每0.5h更换一次去离子水；将超声后的无纺布与不锈钢筛网通过热压印构筑表面微-纳结构，热压温度为145℃，热压压力500KG，预热时间8min，热压时间为3min，开模温度为90℃；利用氟硅烷对无纺布表面进行喷涂5 s进一步降低表面自由能，于80℃真空干燥箱中干燥2h处理。The PP non-woven fabric was prepared by melt-blown non-woven fabric technology, and the thickness of the non-woven fabric was 2 mm; the water-soluble polymer PEO (50% of the non-woven fabric mass) was evenly sprinkled on the PP non-woven fabric, and passed through a vacuum press. Carry out hot-pressing compounding, the hot-pressing temperature is 115°C, the hot-pressing pressure is 1500 KG, the preheating time is 20min, the hot-pressing time is 3min, and the mold opening temperature is 60°C; the non-woven film after hot-pressing reinforcement is placed at 30°C Ultrasound in deionized water for 6 hours, and replace the deionized water every 0.5 hours; the surface micro-nano structure is constructed by hot embossing of the ultrasonic non-woven fabric and stainless steel mesh, the hot pressing temperature is 145 °C, the hot pressing pressure is 500KG, and the pre- The heating time was 8 min, the hot pressing time was 3 min, and the mold opening temperature was 90 °C; the surface of the non-woven fabric was sprayed with fluorosilane for 5 s to further reduce the surface free energy, and dried in a vacuum drying oven at 80 °C for 2 h.
实施例4Example 4
本实施例的基于PP无纺布的油水分离材料的制备方法，步骤如下：The preparation method of the oil-water separation material based on the PP non-woven fabric of the present embodiment, the steps are as follows:
利用熔喷非织造布技术制备PP无纺布，无纺布的厚度为1 mm；将水溶性高分子PEO（无纺布质量的30%）均匀洒在PP无纺布上，通过真空压机进行热压复合，热压温度为115℃，热压压力为1500 KG，预热时间20min，热压时间3min，开模温度60℃；将上述热压加固后的无纺布膜置于30℃去离子水中超声4h，每0.5h更换一次去离子水；将超声后的无纺布与不锈钢筛网通过热压印构筑表面微-纳结构，热压温度为140℃，热压压力1000KG，预热时间8min，热压时间为3min，开模温度为100℃；利用氟硅烷对无纺布表面进行喷涂4 s进一步降低表面自由能，于80℃真空干燥箱中干燥2h处理。The PP non-woven fabric was prepared by melt-blown non-woven fabric technology, and the thickness of the non-woven fabric was 1 mm; the water-soluble polymer PEO (30% of the non-woven fabric mass) was evenly sprinkled on the PP non-woven fabric, and passed through a vacuum press. Carry out hot-pressing compounding, the hot-pressing temperature is 115°C, the hot-pressing pressure is 1500 KG, the preheating time is 20min, the hot-pressing time is 3min, and the mold opening temperature is 60°C; the non-woven film after hot-pressing reinforcement is placed at 30°C Ultrasound in deionized water for 4 hours, and replace the deionized water every 0.5 hours; the ultrasonicated non-woven fabric and stainless steel mesh are subjected to hot embossing to construct a surface micro-nano structure. The hot pressing temperature is 140 °C, and the hot pressing pressure is 1000KG. The heating time was 8 min, the hot pressing time was 3 min, and the mold opening temperature was 100 °C; the surface of the non-woven fabric was sprayed with fluorosilane for 4 s to further reduce the surface free energy, and dried in a vacuum drying oven at 80 °C for 2 h.
以上显示和描述了本发明的基本原理和主要特征以及本发明的优点。本行业的技术人员应该了解，本发明不受上述实施例的限制，上述实施例和说明书中描述的只是说明本发明的原理，在不脱离本发明精神和范围的前提下，本发明还会有各种变化和改进，这些变化和改进都落入要求保护的本发明范围内。本发明要求保护范围由所附的权利要求书及其等效物界定。The foregoing has shown and described the basic principles and main features of the present invention, as well as the advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above-mentioned embodiments. The above-mentioned embodiments and descriptions only illustrate the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will also have Various changes and modifications fall within the scope of the claimed invention. The claimed scope of the present invention is defined by the appended claims and their equivalents.
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