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Chinese Chemical Letters 20 (2009) 483–486 www.elsevier.com/locate/cclet
Synthesis and characterization of novel polypropylene paper releasing anion Li Qiu Wang *, Qing Shan Li, Hui Peng Ma, Xiao Feng Guo, Rui Hong Wang, Gang Yao College of Environmental and Chemical Engineering, State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, State Key Laboratory of Metastable Materials Science and Technology, Qinhuangdao 066004, China Received 8 September 2008
Abstract Polypropylene synthetic paper releasing anion was prepared from polypropylene resin, anion additives, titanium dioxide, etc., by calendar forming method. The synthetic paper was tested by anion detector, SEM, AFM, etc. Tensile strength, elongation at break, right angle tear strength of the polypropylene synthetic paper reached the GB 13022 or QB/T1130 Standard. The synthetic paper was water and oil resistance, and released anions 10,530 cm 3. It was environment-friendly, and a kind of good material for human’s health. # 2008 Li Qiu Wang. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved. Keywords: Synthetic paper; Polypropylene; Functional polymer; Health material; Anions releasing
Functional papers have been extensively used in various fields, and are needed more and more. But gross production of various traditional functional papers has been limited and the cost is getting higher due to short of wood fiber. Synthetic paper, also called chemical film paper, plastic paper or polymer paper, is a kind of paper mainly prepared from polymer materials (polystyrene, polypropylene or polyethylene resin) which are easily synthesized from a variety of chemicals (styrene, propylene or ethene) by polymerization. With good properties, synthetic paper can replace traditional paper for packing, making paper money or bag, printing and duplicating, etc. [1–3]. There are more and more companies to produce synthetic paper, such as Taiwan South Asia, Japanese prince, Du Pont of USA, etc. Taiwan South Asia Company produces synthetic paper in the capacity of about 30,000 tons in China. Polypropylene synthetic paper is one of the synthetic papers, mainly from polypropylene resin that is easily synthesized by polymerization of propylene. This kind of paper has good chemical resistance, oil resistance, water resistance, excellent twists resistance, extremely good writing and printing nature, and strong toughness. Anion can make air fresh, improve the functions of lung and brain, and protect human from diseases [4–6]. With the development of human society and science and technology, environment pollution has become a serious problem for our health, and made anion in air less and less. This article added Anlon-2 into polypropylene resin to prepare
* Corresponding author. E-mail address:
[email protected] (L.Q. Wang). 1001-8417/$ – see front matter # 2008 Li Qiu Wang. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved. doi:10.1016/j.cclet.2008.12.034
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Fig. 1. SEM pictures of Anlon-2.
functional synthetic paper releasing anion for replacing traditional paper in various fields to improve quality of the air and make people more health. The functional polypropylene synthetic paper was prepared from polypropylene (PP), Anlon-2, titanium dioxide and some additives by calendering forming method. First, PP was plasticated in roll mill for 10 min, and then Anlon-2, titanium dioxide and additives were added. After mixed completely, the mixture was put into vulcanizer and obtained the creamy white paper by pressure forming under 150 8C. Properties of the synthetic paper were tested by various detectors, and the results showed that the paper had many good properties, such as high strength, excellent printing result, removal of smell, dimensional stability, not aging, lightweight, adiabatic quality, water resistance, oil resistance, etc. The synthetic paper could release anions 10,530 cm 3. While burning in abundant air, the synthetic paper was turned into carbon dioxide, so it is healthy and environment-friendly product. Anlon-2 was a kind of natural mineral material modified in Qicai Technology Company of Yanshan University. Fig. 1 showed that the particles of Anlon-2 were about 2–4 mm. Polypropylene was from Refinery in Shijiazhuang City; titanium dioxide, additives, and other materials from Chemical Reagent Companies. The synthetic paper was tested by anion detector (Ak-103, IC-1000), scanning electron microscope (KYKY-2800), atom force microscope (AJ-b), respectively. As shown in Figs. 2–4, the thickness of the obtained polypropylene synthetic paper was about 100 nm, and the Anlon-2 particles were homogeneous and were well dispersed in the paper. Physical character parameters of the polypropylene synthetic paper were tested. As shown in Table 1, the tensile strength, elongation at break, right angle tear strength of the paper could reach GB 13022 or QB/T1130 Standard.
Fig. 2. SEM pictures of the paper.
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Fig. 3. AFM pictures of the polypropylene composite fiber.
Fig. 4. The analysis of atomic force microscopic picture of the polypropylene composite fiber.
Because of the good properties, the functional synthetic paper releasing anion can replace traditional paper in every field. For example, when used in the laser typing, duplicator and printer, the synthetic paper had enough strength to against shrinking, rolling and changing of size of the paper during it worked. The Anlon-2 in the synthetic paper as a catalyst could promote water (in air) of decomposition into anion. As shown in Table 2, the largest releasing concentration of anions of the synthetic paper was about 10,530 cm 3, it just corresponded to that in the area of forest or seaside. So the paper will make air fresh and benefit our health. Table 1 Physics character parameters of the synthetic polypropylene paper. Item Vertical tensile strength Horizontal tensile strength
Data 69.1 84.2
Unit
Standard
MPa MPa
GB 13022 GB 13022
Vertical elongation at break Horizontal elongation at break
101.9 79.2
% %
GB 13022 GB 13022
Vertical tearing strength Horizontal tearing strength
100.5 91.2
KN/m KN/m
QB/T1130 QB/T1130
Table 2 Anion concentration comparison. Environment
Anion concentration (ind/cm3)
Fresh degree of the air
The synthetic paper Forest, waterfall Mountain, seaside Park in city Residence area in city
10,530 Above 10,000 5,000—10,000 500–1000 50–100
Super fresh Super fresh Very fresh Some fresh, often falling ill Less fresh, easily falling ill
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While burning in abundant air, the synthetic paper gave out carbon dioxide and no any toxic gases were produced because it mainly contained hydrogen and carbon. In this sense, the synthetic paper is healthy and environmentfriendly. The production of the synthetic paper will be an excellent example of the potential of paper for saving natural resources and environment-friendly processes. It also demonstrates the applicability of functional synthetic paper. The application of polypropylene synthetic paper releasing anion will not only improve annual production of polypropylene, but also make the functions and species of synthetic paper increased. With the development of economy and technology, there will be larger demand for the synthetic paper. Acknowledgments The authors would like to thank National Natural Science Foundation of China (No. 20776122), Hebei Natural Science Foundation (No. B2006000191) and China Chemical Textiles Supervision and Inspection Center for the testing of properties of the products. References [1] [2] [3] [4] [5] [6]
J.Z. Chen, X.Y. Liu, Y.X. You, N. Li, China Paper Newsletter 12 (2007) 38. Q.S. Li, CN:10103342, 2005. J.W. Xu, H.P. Ma, CN:1202166C, 2005. Y. Chen, P.Y. Xiao, Chemical Fiber and Textile Technology 3 (2007) 37. C.J. Cai, C. Wang, K.H. Tao, Urban Environment and Urban Ecology 5 (2007) 6. Z.P. Wu, C. Wang, J.N. Xu, L.X. Hu, Journal of Tsinghua University (Science and Technology) 12 (2007) 2153.