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| 1 | Biomechanism of impact resistance in the woodpecker's head and its application显示文摘The woodpecker does not suffer head/eye impact injuries while drumming on a tree trunk with high acceleration(more than 1000×g) and high frequency.The mechanism that protects the woodpecker's head has aroused the interest of ornithologists,biologists and scientists in the areas of mechanical engineering,material science and electronics engineering.This article reviews the literature on the biomechanisms and materials responsible for protecting the woodpecker from head impact injury and their applications in engineering and human protection. | WANG LiZhen LU Shan LIU XiaoYu NIU XuFeng WANG Chao NI YiKun ZHAO MeiYa FENG ChengLong ZHANG Ming FAN YuBo | 2013 | Science China(Life Sciences)2013，56，8： | 3 |
| 2 | Room temperature polymerization of alkyl isocyanates catalyzed by rare earth Schiff base complexes显示文摘The polymerization of alkyl isocyanates catalyzed by rare earth chloride salen complexes/triisobutyl aluminum(Ln(H2salen)2Cl3·2C2H7OH/Al(i-Bu)3) at room temperature was investigated.The influences of ligand structure,catalyst composition,polymerization temperature,polymerization time,the concentration of catalyst and monomer,and the polymerization solvent on the polymerization of isocyanates were studied.It was found that under the polymerization conditions,examined La(H2salenA)2Cl3·2C2-H7OH/Al(i-Bu)3(H2salenA= N,N'-disalicylideneethylene diamine) is a fairly high efficient catalyst for the polymerization of n-hexyl isocyanate(n-HexNCO) to prepare high molecular weight poly(n-hexyl isocyanate)(PHNCO) with narrower molecular weight distribution at room temperature.PHNCO could be prepared with yield of 74.0%,number-average molecular weight(Mn) of 40.20×104 and MWD of 1.79 under the following optimum conditions:[Al]/[La]=30(molar ratio),[n-HexNCO]/[La]=100(molar ratio),[n-HexNCO]=3.43 mol/L polymerization at 20℃ for 12 h in toluene.In the same polymerization conditions,poly(n-octyl isocyanate)(PONCO) with yield of 67.3%,and poly(n-butyl isocyanate)(PBNCO) with yield of 45.5%,could be prepared respectively.The kinetics of the polymerization of n-HexNCO was also investigated and found to be first-order with respect to both monomer and catalyst concentrations. | XiongFa Yang XuFeng Ni ZhiQuan Shen | 2009 | Science China Chemistry2009，52，11： | 2 |
| 3 | Polymerization of n - hexyl i-socyanate with rare earth catalyst composed of Nd ( P2 04 ) 3/Al ( i -Bu)3 显示文摘 | Xu Xiaoyan Ni Xufeng Shen Zhiquan | 2005 | Polymer Bulletin2005，53，2： | 1 |
| 4 | Copolymerization of phenyliso-cyanate and e - caprolactone with rare earth chloride systems显示文摘 | Ni Xufeng Xu Xiaoyan Shen Zhiquan | 2007 | Jour-nal of Applied Polymer Science2007，103，4： | 1 |
| 5 | Monte Carlo simulation ofgas phase polymerization of 1,3-butadiene Part Ⅰ:Modeling andprogramming显示文摘 | Ling Jun Ni Xufeng Zhang Yifeng | 2000 | Polymer2000，41，24： | 1 |
| 6 | Gas phase polymerizationof 1 , 3-butadiene with supported neodymium-based catalyst :Investigation of molecular weight显示文摘 | Ni Xufeng Li Junfei Zhang Yifeng | 2004 | Journal of Applied PolymerScience2004，92，3： | 1 |
| 7 | Monte Carlo simulation ofgas phase polymerization of 1 , 3-butadiene Part Ⅱ : Kineticsoptimization and confirmation显示文摘 | Ling Jun Ni Xufeng Zhang Yifeng | 2003 | Polymer International2003，52，2： | 1 |
| 8 | Copolymerization of butadiene with styrene by Nd(vers)a-Al(i-Bu)a-CHCla catalyst system显示文摘 | Zhang Qisheng Ni Xufeng Shen Zhiquan | 2004 | Journal of Macromolecular Science Part A: Pure and Applied Chemistry2004，41，1： | 1 |
| 9 | Homopolymer ization and copolymerization of isoprene and styrene with a neo dymium catalyst using an alkylmagnesium cocatalyst 显示文摘 | Zhang Qisheng Ni Xufeng Zhang Yifeng | 2001 | Macromolecular Rapid Communications2001，22，18： | 1 |
| 10 | One pot synthesis of amphiphilic hyperbranched poly-(amino ester) and its dynamic surface activity显示文摘 | Gong Zhangshui Ni Xufeng Liang Zhenhua | 2010 | Chinese Journal of Chemistry2010，28，： | 1 |
| 11 | n-Octyloxyallene homopolymerization and random copolymerization with styrene using catalyst system composed of lanthanide Schiff-base complexes and Al(i-Bu)_3显示文摘The catalyst system composed of lanthanide Schiff-base complexes with [3,5-tBu2 -2-(O)C6H2 CH=NC6H5]3 Ln(THF)(Ln(Salen)3 , Ln = Sc, Y, La, Nd, Sm, Gd, Yb) and triisobutyl aluminum shows high activity for n-octyloxyallene (A) homopolymerization with narrow molecular weight distribution (MWD). The influences of reaction conditions on polymerization behavior are investigated, and poly(n-octyloxyallene) has a weight average molecular weight (M w ) of 20.6 × 10 3 with MWD of 1.39 and 100% yield is obtained under the optimum conditions: [Al]/[Y] = 50 mol/mol, [A]/[Y] = 100 mol/mol, with polymerization at 80 ℃ for 16 h in bulk. The kinetic studies of n-octyloxyallene homopolymerization indicate that the polymerization rate is first-order with respect to the monomer concentration and shows some controlled polymerization characteristics. Random copolymer of n-octyloxyallene with styrene is obtained by using the same binary catalyst system; the reactivity ratios of the comonomer determined by Kelen Tüd s method are r A = 1.20 and r St = 0.35, respectively, the ratio of each segment and M w of the resulting copolymer could be controlled by varying the feed ratio of each monomer. Determined by differential scanning calorimetry, the copolymers obtained show only one glass transition temperature, which increases gradually with the increase of styrene content in the copolymer. | JIAO JunQing ZHU WeiWei NI XuFeng SHEN ZhiQuan | 2013 | Science China Chemistry2013，56，7： | 0 |
| 12 | Key progresses of MOE key laboratory of macromolecular synthesis and functionalization in 2022显示文摘In 2022,The MOE Key Laboratory of Macromolecular Synthesis and Functionalization in Zhejiang University had achieved several important results.First,a series of well-defined dinuclear organoboron catalysts were developed to precisely control the enchainment of ether and carbonate segments during the copolymerization of CO_(2)and epoxides.Second,polyester had been synthesized through cationic copolymerization of cyclic anhydride.Third,ring-opening polymerization of carbon dioxide based valerolactone had been achieved,revealing the prospect of 3-ethylidene-6-vinyltetrahydro-2H-pyran-2-one(EVL)in utilizing CO_(2)and synthesizing functional polymers.Fourth,machine learning methods have been applied to biomaterial research,enabling high-throughput screening of functional biomaterial surfaces for implantable devices,and searching for potent antimicrobial peptides in whole combinatorial peptide libraries.Fifth,methods of characterization of biomacromolecule RNA transcription and manipulation of nucleoside modification were developed.Sixth,artificial enzymes-armed Bifidobacterium Longum probiotics were established to tune down gut inflammation.Seventh,three-dimensional(3D)printing technologies were used to engineer tough supramolecular hydrogels.Eighth,hydroplastic foaming graphene frameworks for acoustic and conductive polymer composites were provided for application.Ninth,aggregate photophysics about the nature of through-space interactions(TSIs)and manipulating their strength in small molecules with non-conjugated structure had been elucidated.Tenth,the forming mechanism of a newfound nested texture in poly(L-lactic acid)(PLLA)spherulitic films had been revealed.Finally,the isotropically dyeing mechanism of KDP single crystals grown from hydrogels have been explored.The related works are reviewed in this paper. | Xumeng Deng Kaihao Chen Kai Pang Xiaoting Liu Minsong Gao Jie Ren Guanwen Yang Guangpeng Wu Chengjian Zhang Xufeng Ni Peng Zhang Jian Ji Jianzhao Liu Zhengwei Mao Ziliang Wu Zhen Xu Haoke Zhang Hanying Li | 2024 | Chinese Chemical Letters2024，35，3： | 0 |
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