共查询到19条相似文献,搜索用时 171 毫秒
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水溶液聚合法合成高吸水性树脂的研究 总被引:1,自引:0,他引:1
以N,N-亚甲基双丙烯酰胺为交联剂,过硫酸钾-亚硫酸氢钠为引发剂,以丙烯酸和丙烯酰胺为单体,采用水溶液聚合法合成了丙烯酸-丙烯酰胺共聚的吸水树脂,并探讨了单体浓度、单体质量比、丙烯酸中和度、交联剂用量、引发剂用量对吸水树脂吸水量的影响,最大吸水率为799.3 g/g。 相似文献
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丙烯酸系高吸水性树脂的合成研究 总被引:1,自引:0,他引:1
本实验运用溶液聚合法,采用丙烯酸,氢氧化钠作为主要反应试剂,并添加过硫酸铵(引发剂);亚硫酸氢钠(还原剂);N,N-亚甲基双丙烯酸酰胺(交联剂)制取丙烯酸类高吸水性树脂,并研究了引发剂用量、还原剂用量、交联剂用量、活性炭用量、中和度、起始温度这六个因素,进行六组测定蒸馏水吸水速率的实验,找出最优条件。 相似文献
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以蔗渣纤维为原料,丙烯酸为接枝单体,N,N-亚甲基双丙烯酰胺为交联剂,K2S2O8为引发剂,通过溶液聚合的方法合成了蔗渣纤维(sugarcanebagasse,SCB)与聚丙烯酸(polyacrylicacid,PAA)的接枝共聚高吸水树脂(scB—g—PAA)。研究了丙烯酸用量、引发剂用量、交联剂用量以及中和度对吸水树脂吸水倍率的影响,结果表明,该接枝共聚吸水树脂的最佳合成条件是以丙烯酸用量为标准,蔗渣纤维、K2S2O8、交联剂用量分别是10%、2%、0.1%,中和度为80%,共聚物吸水倍率最高为765.7g·g-1。 相似文献
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淀粉接枝丙烯酸/丙烯酰胺影响因素的研究 总被引:1,自引:0,他引:1
探索了以过硫酸钾为引发剂,以N,N,-亚甲基双丙烯酰胺为交联剂,将淀粉与丙烯酰胺、丙烯酸在水溶液中聚合制备高吸水性树脂。结果表明:当m(丙烯酰胺):m(丙烯酸)为1:24,单体总用贵为12g,反应温度30%,反应时间2h,丙烯酸中和度94%,引发剂用量0.02g,交联剂用量为0.0015g时,可以合成具有较好的吸水性的高吸水性树脂,在蒸馏水中吸水倍率可达699.99g/g。 相似文献
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A new cellulose‐based superabsorbent polymer, carboxymethyl cellulose‐graft‐poly(acrylic acid‐co‐acrylamide), was prepared by the free‐radical grafting solution polymerization of acrylic acid (AA) and acrylamide (AM) monomers onto carboxymethyl cellulose (CMC) in the presence of N,N′‐methylenebisacrylamide as a crosslinker with a redox couple of potassium persulfate and sodium metabisulfite as an initiator. The influences of reaction variables such as the initiator content, crosslinker content, bath temperature, molar ratio of AA to AM, and weight ratio of the monomers to CMC on the water absorbency of the carboxymethylcellulose‐graft‐poly(acrylic acid‐co‐acrylamide) copolymer were investigated. The copolymer's structures were characterized with Fourier transform infrared spectroscopy. The optimum reaction conditions were obtained as follows: the bath temperature was 50°C; the molar ratio of AA to AM was 3 : 1; the mass ratio of the monomers to CMC was 4 : 1; and the weight percentages of the crosslinker and initiator with respect to the monomers were 0.75 and 1%, respectively. The maximum water absorbency of the optimized product was 920 g/g for distilled water and 85 g/g for a 0.9 wt % aqueous NaCl solution. In addition, the superabsorbent possessed good water retention and salt resistance. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 103: 1382–1388, 2007 相似文献
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A novel potassium humate–acrylic acid–acrylamide (KHA–AA–AM) superabsorbent polymer was prepared from the reaction among leonardite
potassium humate, acrylic acid and acrylamide by free radical initiating process using ammonium persulfate as the initiator
and N, N′-methylene bisacrylamide as the crosslinker. Various effects of synthesis conditions on superabsorbent polymer were
studied and the optimal reaction condition was obtained with crosslinker concentration 0.44–0.74 wt%, initiator concentration
1.12–2.22 wt%, n(KOH)/n(AA) 0.51–0.70, monomer concentration 10.95–12.59 wt%, graft reaction temperature 83 ± 1°C, monomer
mole ratio of acrylic acid to acrylamide 1.42–2.30, and potassium humate content 17.54 wt%. Under the optimal conditions,
the solution absorbency of KHA–AA–AM superabsorbent polymer to deionized water, tap water, 0.5% carbamide solution and 0.9%
NaCl solution were 733–756, 161–284, 786–825, and 76–83 g/g, respectively. 相似文献
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Tao Wan Lan Wang Jie Yao XiaoLing Ma QingSheng Yin TianShun Zang 《Polymer Bulletin》2008,60(4):431-440
A series of novel copolymer superabsorbents based on acrylamide (AM), acrylic acid(AA) were prepared
by inverse microemulsion copolymerization using ammonium persulfate (APS) as the initiator and N,N-methylenebisacrylamide
(MBA) as the crosslinking agent and OP-10 and SDS as complex surfactants. The synthetic variables (amount
of crosslinking agent and initiator, water/oil ratio, monomer/surfactant ratio and AA/ Am ratio) and their
effects on the absorbencies of the synthesized superabsorbents were investigated. The experimental results
of superabsorbent polymers (SAPs) showed the maximum saline solution absorbency of 130 g/g within
75 min, and the saline solution absorbency of 111 g/g within 30 min. FTIR indicated the
structure of the acrylic acid and acrylamide copolymer. SEM indicated that the particles prepared with
higher crosslinker content (0.03%) showed smaller pore sizes and less porous structures compared with those
with less crosslinker content (0.01%) and the number of the micropores largely decreased with the water/oil
ratio increasing from 8% to 14%. 相似文献
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酸化处理是油气井增产增注的重要措施之一,而其中稠化剂是酸液中一种重要的酸性添加剂.文章中以二甲基二烯丙基氯化铵(DMDAAC)和丙烯酰胺(AM)为原料,过硫酸铵-亚硫酸氢钠为引发剂,采用水溶液聚合制备共聚物PDA((Poly DMDAAC-AM).实验考察了单体配比、总单体质量分数和引发剂用量等反应条件对共聚物特性粘数和单体转化率的影响.结果表明,经红外检测AM和DMDAAC发生了聚合,单体配比n(AM)∶n(DMDAAC)=8∶2,单体总质量分数为20%,引发剂用量为过硫酸铵和亚硫酸氢钠各占单体总质量的0.04%,最高单体转化率为67.70%,最佳特性粘数为505.59 mL/g.实验采用石油工业标准(SY/T6214-1996)对产品性能进行了评价,结果表明产品性能优良,可用作酸液稠化剂. 相似文献
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以丙烯酸,硅藻土为原料,过硫酸铵为引发剂,N,N’-亚甲基双丙烯酰胺为交联剂,通过接枝壳聚糖制备了壳聚糖-硅藻土-聚丙烯酸高吸水性树脂,并对高吸水性树脂的结构进行了红外光谱的表征,系统研究了引发剂、交联剂、硅藻土的用量,丙烯酸与壳聚糖的质量比,丙烯酸的中和度,反应温度以及反应时间对高吸水性树脂吸水率的影响。实验结果表明,丙烯酸与壳聚糖的质量比为12∶1,硅藻土的含量为1%,引发剂和交联剂的用量分别为2.5%和0.16%,中和度为70%,反应温度为60℃,反应时间为5.5h时,合成的壳聚糖-硅藻土-聚丙烯酸高吸水性树脂吸水(盐)率最高,分别为145g/g和30g/g。 相似文献
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以过硫酸铵(APS)为引发剂,N,N-亚甲基双丙烯酰胺(MBA)为交联剂,采用反相悬浮乳液聚合法合成了丙烯酸(AA)-丙烯酰胺(AM)-2-丙烯酰胺基辛烷基磺酸钠(NaAMC8S)三元共聚高吸水树脂,研究了引发剂含量、交联剂含量、AA中和度对树脂吸液性能的影响。结果表明:磺酸基单体NaAMC8S的加入显著提高了吸水树脂的盐水吸收能力,当引发剂含量为0.2%,交联剂含量为0.02%,中和度为75%,加入NaAMC8S为0.5%时,共聚树脂吸自来水的量为601mL/g,吸0.9%Nacl水溶液的量为154mL/g。 相似文献