阳离子羧甲基羟丙基瓜尔胶的制备及其助留助滤性能研究
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摘要
以1-烯丙基-3-甲基咪唑乙酸鎓盐([AMIM]Ac)为反应介质,3-氯-2-羟丙基三甲基氯化铵(CTA)、氯乙酸钠、环氧丙烷为改性剂,创新性的一步制备了阳离子羧甲基羟丙基瓜尔胶(CCMHPG)。研究了3种改性剂用量、碱用量、反应温度、反应时间对产物取代度和粘度的影响,确定了最佳制备条件。经测定,反应产物的阳离子取代度为0.24,羧甲基取代度为0.41,羟丙基取代度为0.36,产物水溶性较好,1%水溶液粘度达1 072 mPa·s。CCMHPG的红外谱图和~1H NMR谱表明季铵基团、羧甲基和羟丙基均已成功接枝到瓜尔胶分子上,电镜照片显示颗粒表面出现了褶皱及鳞片状裂纹。将CCMHPG/PAC二元微粒体系用于脱墨废纸浆,PAC添加量为0.8%、CCMHPG添加量为0.04%时的留着率为94.3%,打浆度为43°SR。
CCMHPG was prepared innovatively in one step using [AMIM]Ac as the reaction medium, and CTA, sodium chloroacetate and propylene oxide as modifiers. The effects of the three modifiers' dosage, alkali dosage, reaction temperature and reaction time on the degree of substitution and viscosity of the product were studied to determine the optimum preparation conditions.The results showed that the water solubility of the reaction product was good, the viscosity of 1% aqueous solution was 1 072 mPa·s, the cationic substitution degree was 0.24, the carboxymethyl substitution degree was 0.41 and the hydroxypropyl substitution degree was 0.36. ~1H NMR showed that quaternary ammonium groups, carboxymethyl groups and hydroxypropyl groups were successfully grafted onto guar-gel molecules. SEM showed that wrinkles and scaly cracks were observed on the surface of the particles. The CCMHPG/PAC binary system was used for deinking pulp, the retention rate was 94.3% and the beating degree was 43°SR when adding 0.8% PAC and 0.04% CCMHPG.
CCMHPG was prepared innovatively in one step using [AMIM]Ac as the reaction medium, and CTA, sodium chloroacetate and propylene oxide as modifiers. The effects of the three modifiers' dosage, alkali dosage, reaction temperature and reaction time on the degree of substitution and viscosity of the product were studied to determine the optimum preparation conditions.The results showed that the water solubility of the reaction product was good, the viscosity of 1% aqueous solution was 1 072 mPa·s, the cationic substitution degree was 0.24, the carboxymethyl substitution degree was 0.41 and the hydroxypropyl substitution degree was 0.36. ~1H NMR showed that quaternary ammonium groups, carboxymethyl groups and hydroxypropyl groups were successfully grafted onto guar-gel molecules. SEM showed that wrinkles and scaly cracks were observed on the surface of the particles. The CCMHPG/PAC binary system was used for deinking pulp, the retention rate was 94.3% and the beating degree was 43°SR when adding 0.8% PAC and 0.04% CCMHPG.
引文
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[2] Emine A E, Esra I. Effects of pectin and guar gum on creaming stability, microstructure and rheology of egg yolk plasma-stabilized emulsions[J].European Food Research and Technology, 2010,231(2):297-302.
[3] Kavita Taunk, Behari Kunj. Graft copolymerization of acrylic acid onto guar gum [J]. Journal of Applied Polymer Science, 2000,77(1):39-44.
[4] Ramnial T, Ino D D, Clyburne J A C. Phosphonium ionic liquids as reaction media for strong bases[J]. Chemical Communications, 2005(3):325-327.
[5] Nylander T, Samoshina Y, Lindman B. Formation of polyelectrolyte surfactant complexes on surfaces [J]. Advances in Colloid and Interface science, 2006,123: 105-123.
[6] Morris J B. Morphological and reproductive characterization of guar (cyamopsis tetragonoloba) genetic resources regenerated in Georgia [J]. Genet Resour Crop Evol, 2010,57(7): 985-993.
[7] Plechkova N V, Seddon K R. Applications of ionic liquids in the chemical industry [J]. Chemical Society Reviews, 2008,37(1):123-130.
[8] Visser A E, Swatloski R P, Rogers R D, et al. Task-specific ionic liquids for the extraction of metal ions from aqueous solutions[J]. Chem Commun, 2001(1):135-136.
[9] Asselman T, Garnier G. The flocculation mechanism of microparticulate retention aid systems [J].Journal of Pulp and Paper Science, 2001,27(8):273-278.
[10] Ovenden C, Xiao H N, Wiseman N. Retention aid systems of cationic microparticles and anionic polymer: experiments and pilot machine trials [J].TAPPI Journal, 2000,83(3):80-85.
[11] Liu W J, Wu S B. Application of cationic cassava dregs as a retention and drainage aid in wet-end system [J].Applied Mechanics and Materials, 2014,472(1):626-631.
[12] Abson D, Brooks D F. Wet-end behavior of dry strength additives [J].TAPPI Journal, 1985, 68(1):76-78.
[13] Guenter T, Anton B. Use and effectiveness of modified galactomannans in acidic and neutral paper manufacture [J]. Switz: Wochenblatt Fuer Papierfabrikation, 1983,111(9):311-317.
[14] Wu J, Zhang J, Zhang H, et al.Homogeneous acetylation of cellulose in a new ionic liquid [J].Biomacromolecules, 2004,5(2):266-268.
[15] Biswas A,Shogren R L, Stevenson D G, et al.Ionic liquids as solvents for biopolymers: acylation of starch and zein protein [J].Carbohydrate Polymers, 2006,66(4):546-550.