王琪
博士 教授
四川大学 高分子研究所
聚合物共混和复合材料,高分子材料制备新技术等
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- 姓名:王琪
- 目前身份:在职研究人员
- 担任导师情况:
- 学位:博士
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学术头衔:
博士生导师,
- 职称:高级-教授
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学科领域:
材料科学基础学科
- 研究兴趣:聚合物共混和复合材料,高分子材料制备新技术等
王琪,女,1949年7月生,成都科技大学高分子材料专业毕业,1989年6月获工学博士学位(导师:中科院院士徐僖教授),1989年12月至1992年2月在加拿大LaVa大学高分子科学工程研究中心作博士后。现为四川大学教授、博士生导师、高分子材料工程国家重点实验室主任、高分子研究所副所长,四川大学2ll工程建设项目高分子材料与工程建设工作组负责人,国家自然科学基金委化学部高分子学科评审组成员,国家教育部科学技术委员会材料学部委员,全国高校化工类及相关专业教学指导委员会委员及高分子材料与化工教学指导组组长,中国塑料协会工程塑料专业委员会副理事长,中国机械工程学会材料分会高分子材料专业委员会副主任委员,"高分子材料科学与工程"和"功能高分子学报"编委。2017年当选中国工程院院士。
主要从事高分子间复合物、聚合物共混物和复合材料、以及高分子力化学等方面的研究。承担并完成国家科技部、国家自然科学基金、国家教委、中国石化总公司、中国石油天然气总公司、四川省科委等资助的多项科研课题,以及与美国Rohm&Haas公司、DoW化学公司、荷兰DSM公司的的国际合作科研项目。在用催化接枝技术制备新型聚合物/纤维复合材料,用高分子间分子复合方法制备新型高分子固体电解质、新型复合纤维、新型聚合物驱油剂,研制新型力化学反应器及用力化学方法制备新型高分子材料以及聚合物加工中的流变学和化学流变学等研究方面取得成果。发表学术论文100余篇, 在 "J.Macromol. SCi""J.Appl polym.SCi""Eur.polym. J","pOlym.International","中国科学","科学通报","高分子学报","高等学校化学学报"及"高分子材料科学与工程"等国内外核心刊物上均有论文发表,其中不少论文被SCI和EI等收录。申请中国专利10项,已授权3项,公开3项。科研成果曾获国家教委(教育部)科技进步一等奖(1998年)、二等奖(1992年)、三等奖(1998年)和中国石化总公司科技进步三等奖(1991年)。教学方面,指导10名博士生,9名硕士生,指导22余名本科生毕业论文,主讲一门硕士生学位课。作为高分子材料工程国家重点实验室主任、高分子研究所副所长,四川大学211程建设项目高分子材料与工程建设工作组负责人,参加重点实验室和重点学科的建设、发展和对外交流工作。在科研、教学、人才培养及重点实验室建设方面作出贡献。1991年被国家教委、国务院学位委员会授予"有突出贡献的中国博士学位获得者"称号,1993年12月被国务院学位委员会批准为博士生导师,1993年底首批入选国家教委"跨世纪优秀人才培养计划",1993年起享受政府特殊津贴,1994年获"宝钢教育基金"优秀教师奖, 1993年和 1994年连续两年获成都科技大学(现四川大学)优秀中青年教师一等奖,1997年被国家教委、人事部评为"全国优秀留学回国人员", 1998年被四川省省委、省政府批准为首批四川省学术和技术带头人之一(工程科学技术)。
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成果数
16
王琪, Weiguo Shao, Qi Wang* and Hong Ma
Polym Int 54: 336-341 (2005),-0001,():
-1年11月30日
In this paper, polypropylene (PP)/organophilicmontmorillonite (OMMT) nanocomposites were successfully prepared without any compatibilizers by solid-state shear compounding (S3C) using panmill equipment. X-ray diffraction (XRD) patterns show that the OMMT characteristic (001) peak at 2θ equal to 4.59 degrees disappeared for the milled OMMT and corresponding composites. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) photographs show that the thickness of pan-milled OMMT decreased from ca 100-200nm to ca 30-50nm, and OMMT was partly exfoliated in the PPmatrix because the pan-type mill can exert fairly strong squeezing force in the normal direction and shearing force in both radial and tangential directions on milled materials. PP/OMMT nanocomposites at low OMMT loading have higher melting point, crystallization temperature, thermal degradation temperature and heat distortion temperature than those of neat PP. Moreover, addition of OMMT accelerates crystallization of PP significantly. S3C is a novel approach to prepare polymer/layered silicate nanocomposites with high performances at low filler loading.
polypropylene/, OMMT nanocomposites, solid-state shear compounding (, S3C), , morphology, thermal properties
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王琪, QI WANG, SERGE KALIAGUINE, and ABDELLATIF AIT-KADI*,
,-0001,():
-1年11月30日
In this work we present a new technique to prepare polyoletin-fiber composites. This technique is based on chemical anchoring of a catalyst on reinforcing agents corntaining OH groups on their surface and then conducting an olefin polymerization on the supported catalyst. This technique offers the possibility to approach the challenging problems encountered in poldymer conmposites, namely, the reinforcement matrix adhesion, the dispersion, and the wetting of the reinforcement by the resin. As a first part of a systematic research, we report on the procedure of fixation of titanium tetraehloride on the surface of asbestos fibers and the Ziegler Natta polymerization of ethylene on the surface-modified tibers. The procedure as well as the structure end properties of the composite were investigated hy means of FTIR, atomic absorption. SEM, solvent extraction, and tensile testing. The experimental results show that the Ziegler Natta catalyst can be efficiently anchored on. the surface of the fibers to conduct successful polymerization and to "synthesize" a new class of polymer composites.
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王琪, Xi Xu, Qi Wang, Xiangan Kong, Xiaodong Zhang, and Jingui Huang
Plastics, Rubber and Composites Processing and Applications 1996 Vol.25 No.3 152-158,-0001,():
-1年11月30日
Based on the traditional Chinese stonemill, pan mill type equipment designed for polymer stress reactions in the solid state has been developed. Experimental results show that this equipment is much more efficient than the traditional vibromili at pulverising brittle polymer materials and is also very efficient at pulverising ductile polymers. A theoretical analysis of the structure and milling process of the novel equipment is given, which demonstrates that during pan milling the pan mill type equipment could exert reasonably strong pressure and shear forces on the materials owing to its particular structure. The materials were shown to move in a spiral manner. A mathematical model was derived to describe the particle trajectory during milling, which was verified experimentally.
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王琪, Qi Wang* and Lingyun He
Polymer Vol. 38 No.15, pp. 3931-3935, 1997,-0001,():
-1年11月30日
In this paper, the poly(acrylonitrile-acrylamide-acrylic acid) [P(AN-AM-AA)]/poly(vinyl alcohol) (PVA) intermacromolecular complex formed through hydrogen bonding is described. The experimental results show that P(AN-AM-AA), which was prepared by hydrolysis of polyacrylonitrile followed by acidifying, complexes with PVA through hydrogen bonding, as verified by pH value testing and FTi.r. thermal analysis demonstrates that the complex formed is superior in thermal stability, compared with its component polymers. Favourable conditions for complexation of P(AN-AM-AA) with PVA are: AA content in P(AN-AM-AA): 41-46%; a ratio of P(AN-AM-AA) to PVA in the range 1:20-1:10; and a solution pH value of 5.0-5.5.
P(, AN-AM-AA), /, PVA, intermacromolecular complex, formation),
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王琪, QI WANG, LINGYUN HE, JINGUI HUANG
,-0001,():
-1年11月30日
In this article the supermolecular structure and mechanical properties of poly(acrylonitrile-acrylamide-acrylic acid)/poly(vinyl alcohol) [P(AN-AM-AA)/ PVA] intermacromolecular complex formed through hydrogen bonding were studied by means of SEM, TEM, and mechanical property testing. The experimental results show that fibrous or network structure could be formed in P(AN-AM-AA)/PVA intermacromolecular complex, and this unique supramolecular structure endows the material with much superior mechanical properties to its constituents. The tensile strength of P(AN-AM-AA)/PVA complex is as high as 3 times that of PVA, and the Young's modulus of the complex is almost 6 times that of PVA. All the encouraging results demonstrate that intermacromolecular complexation among the polymers having complementary structures is an innovative strategy to reinforce polymer materials and, therefore, to prepare a new kind of microcomposites.
supermolecular structure, intermacromolecular complex, hydrogen bonding, mechanical property, microcomposite
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【期刊论文】Preparation of novel polymer materials through intermacromolecular complexation
王琪, Qi Wang*, Jun Gao, Yi Dan, Zhe Chen
Materials Science and Engineering C 10 1999. 135-140,-0001,():
-1年11月30日
This paper briefly reports the research work conducted in our laboratory in recent years on preparation of novel polymer materials through intermacromolecular complexation. A new polymer solid electrolyte poly methyl methacrylate-methacrylic acid.wP MMA-MAA.xrpoly ethylene oxide. PEO.rA2-LiClO4 was developed by employing both intermacromolecular complexation through hydrogen bonding and plasticization, which has enhanced ambient ionic conductivity up to 8.31=10y5 S cmy1 and fairly good mechanical and film-forming properties, and has potential application in solid state batteries, electrical displaying devices. A new polymer microcomposite poly acrylonitrile–acrylamide–acrylic acid.wP AN-AM-AA.xrpoly vinyl alcohol. PVA. reinforced by the twin molecular chain microfibrils formed through intermacromolecular complexation of P AN-AM-AA.with PVA through hydrogen bonding was developed, which exhibits much better mechanical properties than its constituents and could be used to manufacture PVA based complexed fibers with higher modulus and better dyeability. Also, a new polymer flooding agent poly acrylamide-acrylic acid. wP AM-AA.xrpoly acrylamide-dimethyldiallylammonium chloride.wP AM-DMDAAC.x was developed by employing intermacromolecular complexation of the oppositely charged polyions through Coulomb forces, which shows much higher viscosity and better resistance to temperature, shear rate and salt than its constituents, and has potential application in enhanced oil recovery. All these encouraging results demonstrate that as a supramolecular strategy, intermacromolecular complexation really offers a new route to tailor the specific architecture of polymers using macromolecules with complementary structure as building block and to develop novel polymer materials with high performance.
Preparation, Novel polymer materials, Intermacromolecular complexation
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【期刊论文】Preparation of Polymer/Inorganic Nanoparticles Composites Through Ultrasonic Irradiation
王琪, QI WANG, HESHENG XIA, CHUHONG ZHANG
Journal of Applied Polymer Science, Vol. 80, 1478-1488 (2001),-0001,():
-1年11月30日
In this paper, ultrasonic induced encapsulating emulsion polymerization was first used to prepare the novel polymer/inorganic nanoparticles composites. The behaviors of several inorganic nanoparticles (SiO2, Al2O3, TiO2) under ultrasonic irradiation, such as dispersion, crushing, and activation, were studied. The dispersion stability, morphology, and structure of the ultrasonic irradiated nanoparticles were characterized by means of transmission electron microscopy (TEM), Fourier transform infrared (FTIR), and spectrophotometry, respectively. The results show that the inorganic nanoparticles in the aqueous solution can redisperse more effectively by ultrasonic irradiation than by conventional stirring. This is the basis for preparation of polymer/inorganic nanoparticles composites. By this technique, the long-term stable latex, which mainly consists of polymer/inorganic nanoparticles composite latex particles, were successfully prepared. TEM, FTIR, thermogravimetric analysis, X-ray photoelectron spectroscopy, spectrophotometry, and element analysis confirmed that welldispersed nanoparticles were encapsulated by the formed polymer, and the thickness of encapsulating polymer layer was in the range of 5-65nm.
polymer/, inorganic nanoparticles composites, ultrasonic irradiation, stability
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【期刊论文】Solid-Phase Preparation of UItra-Fine PA6 Powder Through Pan-Milling
王琪, ZHE CHEN, CHANGSHENG LIU, and QI WANG*
POLYMER ENGINEERING AND SCIENCE, JULY 2001, Vol. 41, No.7, 1187-1195,-0001,():
-1年11月30日
The engineering plastic polyamide 6 (PA6} was effectively pulverized to ultra-fine powder through a self-made pan-type milling equipment. A laser Diffraction Particle Size Analyzer and TEM were used to examine the particle size and the distribution of PA6 powder. The results show that the average particle size of PA6 was reduced to micrometer scale only after 15 mining-cycles and reached 50-80nm after 30 milling-cycles. Pan milling decreased crystallinity of PA6 but did not affect its crystal type. Molecular weight and mechanical properties of PA6 dropped slightly during pan milling. The average particle size of PA6 powder could be controUed by adjusting processing conditions including milling time, temperature and the rotating speed of the milling pan.
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【期刊论文】Pan-milling mixing-a novel approach to forming polymer blends and controlling their morphology
王琪, Zhe Chen and Qi Wang
Polym Int 50: 966-972 (2001),-0001,():
-1年11月30日
A novel technique (pan-milling mixing) was developed to control the morphology and thus enhance the mechanical properties of polypropylene/polyamide 6 (PP/PA6) systems. Through panmilling at ambient temperature, PP/PA6 pellets of particle size 2-4ram can be effectively pulverized to well-mixed micrometre fine powders in the solid state. During pan-milling ofmixtures of PP and PA6, the polymer molecules undergo chain saission and form copolymers that compatibilize the two polymers in situ. By press moulding the finely mixed PP/PA6 powder obtained at a temperature between the melting points of PA6 and PP (for example 200℃), a blend can be obtained in which the PA6 powder, retained throughout the process in the solid state, is well dispersed in the PP matrix. The mechanical properties of the system are much better than that of PP/PA6 blends prepared by common twin screw extrusion mixing and injection moulding. Tensile strengths of the fine PA6 particle filled PP/PA6 (70/30) blend is 29.3MPa, which is 6.1MPa higher than that of a conventionally prepared PP/PA6 blend. The Izod notched impact strength of a fine PA6 particle-filled PP/PA6 (70/30) blend is 6.34kJ m 2, which is 1.72kJ m 2 higher than that of a conventionally prepared PP/PA6 blend. Morphological analysis shows that the domain size of PA6 in the system is much smaller than that of the PP/PA6 blend, and can be controlled by the processing conditions such as temperature.
pan-milling mixing, polypropylene, polyamide 6, in situ compatibilization, toughening, morphologycontrol
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王琪, Hesheng Xia and Qi Wang*
Journal of Nanoparticle Research 3: 401-411, 2001.,-0001,():
-1年11月30日
Polyaniline (PANI) nanoparticles were prepared through ultrasonic assisted inverse microemulsion polymerization method. Polymerization of aniline was confined to a nanoreactor named 'water pool' surrounded by surfactant molecules in the apolar continuous phase. The size of the PANI nanoparticles decreases with the decrease of the w value. The spherical nanoparticles (10-50nm) can further form the uniform submicrometer aggregates with a size of 200~400nm induced by ethanol, and the size of the aggregate decreases with the decrease of the w value. The morphology of aggregates as well as aggregation behavior of PANI nanoparticles were characterized by TEM. The polymerization rate, UV-vis absorption spectra, FTIR spectra, XRD, as well as the conductivity were examined at different [water]/[surfactant] molar ratio, i.e. wvalue. Ultrasound enhances the polymerization rate of aniline that is usually very slow under conventional stirring in inverse microemulsion and contributes to produce spherical nanoparticles. Also, ultrasound irradiation promotes the diffusion of HCl molecules and improves the degree of doping. Polymerization of aniline occurred in the confined nanoreactor in microemulsion and strengthens the hydrogen-bonding of amine and imine of PANI molecular chains, which improves the degree of crystallinity. The conductivity of obtained PANI is in the magnitude of 10−1 Scm−1, and is changed with w value.
polyaniline,, ultrasonic,, microemulsion,, nanoparticles,, aggregation,, conductive polymer
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