Radiation shielding non-woven fabric and preparation method thereof

Abstract

The invention relates to radiation shielding non-woven fabric and a preparation method thereof. The radiation shielding non-woven fabric is prepared from the following components in percentage by weight: 1-10% of ammonium tungstate, 5-20% of polyacrylonitrile copolymer and 80-95% of DMF (N,N-dimethylformamide). The preparation method comprises the following steps: proportionally preparing raw materials, sequentially feeding the raw materials to obtain a light yellow transparent clear homogenous-phase mixed solution, debubbling by ultrasonic and standing to obtain a spinning solution, and carrying out electrostatic spinning treatment to obtain a nano or micro raw fabric; drying the raw fabric, and carrying out preoxidation on the dried raw fabric in the presence of air; and carbonizing the preoxidated raw fabric in a nitrogen atmosphere to obtain the radiation shielding non-woven fabric. The radiation shielding non-woven fabric has the properties of fiber substances and the radiation-resistant function of the metal tungsten, and can be prepared into products with different densities according to different proportions. 本发明涉及一种辐射屏蔽非织布及其制备方法，该辐射屏蔽非织布的原料组分按重量百分比包括：1～10%的钨酸铵盐、5～20%的聚丙烯腈共聚物，80～95%的DMF；该辐射屏蔽非织布的制备方法则是按比例配备原料，并按照先后顺序投料，从而得到淡黄色透明澄清均一相的混合溶液，超声静置脱泡，即得到纺丝液，然后通过静电纺丝处理，制备出纳米级或微米级的坯布；将得到的坯布进行干燥，在空气存在的条件下，把干燥后的坯布作预氧化处理；将预氧化处理过的坯布在氮气的氛围中进行碳化处理，即得到辐射屏蔽非织布。实施本发明的有益效果：既具有纤维物的性能，同时又具有金属钨的抗辐射功能，并且可根据不同的配比制造出不同密度的产品。