柳明珠
1.长期从事有机功能高分子材料的合成、结构与性能及其应用研究
个性化签名
- 姓名:柳明珠
- 目前身份:
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学术头衔:
博士生导师
- 职称:-
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学科领域:
高分子化学
- 研究兴趣:1.长期从事有机功能高分子材料的合成、结构与性能及其应用研究
柳明珠,男,汉族,1953年8月30日出生,甘肃省庄浪县人。毕业于北京大学化学系,在南京大学获理学博士学位,曾在香港中文大学化学系从事合作研究6个月。现任兰州大学化学化工学院教授、博士生导师、化学系系主任兼高分子科学与工程研究所所长。政府特贴享受者(2000年)、兰州大学2004年师德标兵。目前主要学术兼职有:中国化学会高分子专业委员会高聚物分子表征学科组成员、甘肃省化学会理事、«兰州大学学报»和«合成橡胶工业»杂志编委、«石油化工»杂志固定审稿人。
柳明珠教授在兰州大学任教二十多年来,一直从事高分子化学与物理教学及科研工作。科学研究方面取得的主要成果有:1.长期从事有机功能高分子材料的合成、结构与性能及其应用研究,先后研制出了多种不同类型的超强高吸水性树脂且均通过了省级鉴定,其中“多功能超强吸水保水剂工业化生产技术及其在农林业中的推广应用”项目被鉴定为国际先进水平,并被国家科技部确定为“九五”国家科技成果重点推广项目,其产品被国家科技部等国务院五部委评定为2000年度国家重点新产品,上述项目还被评定为2000年度甘肃省科技进步二等奖和2000年度甘肃省重大科技成果转化项目。2.近十多年来,坚持开展环境友好高分子材料研究,由其主持完成的中法合作研究项目―可控光/生物双降解塑料薄膜研究与开发(国家基金委、国家教育部、国家外专局项目)已完成了实验室小试及中试。中试薄膜中淀粉含量达35%,薄膜厚度、力学及光学性能指标达到了国标要求,生物降解及光降解性能满足实际使用要求。3.瞄准国际高分子材料研究前沿领域,开展智能高分子材料研究(国家教育部博士点专项基金、甘肃省自然科学基金项目)。近年来,柳明珠教授所在的科研小组先后开展了温度敏感性、pH敏感性、离子强度敏感性以及温度/pH双重敏感性智能高分子材料研究,上述材料用于肥料及药物缓释,已初见成效。4.固沙与植被一体化研究(国家科技部863项目),将所研制的超强高吸水性树脂用于甘肃河西地区固沙与植被一体化研究,已取得初步结果。5.获得中国发明专利1项。6.在国内外有关刊物已发表学术论文60余篇。
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【期刊论文】Preparation and Properties of a Salt-Resistant Superabsorbent Polymer
柳明珠, Songmei Ma, Mingzhu Liu, Zhenbin Chen
Journal of Applied Polymer Science, Vol. 93, 2532-2541(2004),-0001,():
-1年11月30日
Crosslinked sodium polyacrylate was prepared by solution polymerization with N,N-methylene-bisacrylamide (bisAM) as crosslinking agent; it was subsequently surface-crosslinked by ethylene glycol diglycidyl ether (EGDE) and then was modified with inorganic salt to obtain a superabsorbent with water absorbency in 0.9 wt % NaCl aqueous solution at atmosphere and applied pressure (P≈2×103Pa) of 55 and 20 g.g-1, respectively. Moreover, it also had excellent hydrogel strength. The effects of reaction temperature, reaction time, neutralization degree (ND) of acrylic acid, amount of initiator, crosslinking agent, and surface-crosslinking agent, mass ratio of inorganic salt to initial superabsorbent, molar ratio of sodium aluminate (NaAlO2) to potassium dihydrogen hyphosphate (KH2PO4) on water absorbency (WA) in 0.9wt % NaCl aqueous, and the hydrogel modulus were investigated and optimized.
superabsorbent, salt-resistant, acrylic acid, surface-Crosslinked
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柳明珠, Shouxin Liu, , Mingzhu Liu
Journal of Applied Polymer Science, Vol. 90, 3563-3568(2003),-0001,():
-1年11月30日
A series of pH-and temperature-responsive (N,N-diethylacrylamide-co-methacrylic acid) (DEAM-MAA) random copolymers were synthesized by free-radical copolymerization techniques, and their lower critical solution temperatures (LCSTs) at different pH values and their critical phase-transition pH values at different temperatures were determined by transmittance measurements, respectively. The LCSTs of DEAM-MAA copolymers depend on the MAA content in the copolymers and are significantly affected by the pH of the aqueous solution. Similarly, the critical phase-transition pH values also depend on the MAA content of the DEAM-MAA copolymers and are significantly affected by the temperature of the aqueous solution. The LCST of DEAM-MAA copolymers increases with an increase in the MAA content. The critical phase-transition pH increases with increasing MAA content in the copolymer and also increases with increasing aqueous solution temperature.
transmittance, lower critical solution temperatures (, LCST), , copolymerization, phase behavior, radical polymerization
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柳明珠, MINGZHU LIU, RONGSHI CHENG, CHI WU, RENYUAN QIAN
Journal of Polymer Science: Part B: Polymer Physics, Vol. 35, 2421-2427(1997),-0001,():
-1年11月30日
An investigation of influence of cryogenic treatment on extremely dilute aqueous solution of poly(vinyl alcohol) (PVA) was performed by viscometry. The solution was frozen in liquid nitrogen or in a freezer at-25℃, then thawed at ambient temperature and concentrated by evacuation. The viscosity of the solution was measured using the dilute method. The experimental results indicated that the viscosity of the solution is related to N, the times of the freezing and thawing cycle, and the temperature for freezing. Undergoing a treatment of freezing and thawing, the viscosity of the solution is decreased, while it can be recovered the value of before the treatment as the solution had been heated at a high temperature. Thus, a conclusion may be obtained; that is, for an extremely dilute aqueous solution of PVA, which concentration is below Cgel, threshold concentration for gelation, an intramolecular hydrogen bonding cohesional entanglement can be formed by freezing as N>5. However, in the case of N<5, it not only formed an intramolecular hydrogen bonding but also produced an intermolecular hydrogen bonding. At the same time, the abnormal behavior of reduced viscosity of the solution in extremely dilute concentration region has been explained.
intramolecular hydrogen bonding, entanglement, viscosity, solution, polyvinyl alcohol
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