Sugar bagasse was converted into an anion-exchanger through grafting acrylamide using (NH4)2Fe(SO4)2/H2O2 as initiator in an aqueous system, followed by reacting with ethylenediamine and hydrochloric acid. The effects of the grafting conditions such as monomer concentration, temperature, reaction time on the degree of grafting were investigated. The ion exchange capacity of the sugar bagasse base anion-exchange fiber (SB-IEF) was up to 3.70 mmol/g. Application of the SB-IEF in sugar decolorization was evaluated. Compared with commercial strong basic anion exchange resin (AIER) and strong basic anion exchange fiber (AIEF), SB-IEF showed the highest static decolorization capacity for sugar colorants (decolorization degree 71.40%), followed by AIEF (decolorization degree 68.74%) and AIER (decolorization degree 31.40%) at the same operating conditions. The dynamic decolorization results indicated that SB-IEF showed larger processing volume than AIER and AIEF. SB-IEF with higher grafting degree would have a higher decolorization degree. When 200 mL 2% brown granulated sugar solution was treated with 1 g SB-IEF (grafting degree 82%), 80% decolorization degree could be achieved. The research results may provide a recyclable route for the comprehensive utilization of by-products of sucrose industry. (c) 2012 Wiley Periodicals, Inc. J Appl Polym Sci, 2012

An aminated bagasse (AB) with high-adsorption capacity for mercury ions was prepared by grafting copolymerization of acrylonitrile onto sugarcane bagasse, followed by aminating with chelating molecule diethylenetriamine. Effects of grafting conditions such as irradiation dosage, acrylonitrile concentration, and solvents on the grafting yield were investigated. The adsorption performance for mercury ions were evaluated by batch adsorption experiments and kinetic experiments. The results show that AB is effective for the removal of mercury over a wide range of pH > 5. Adsorption isotherms of mercury ions on the modified bagasse can be well described by Langmuir equation. The equilibrium adsorption amount could be as high as 917.4 mg/g, and the removal percent of mercury ions can achieve 99%. The kinetic adsorption results indicate that AB could remove 80% of mercury ions in 2 h and 24 more hours are needed to achieve adsorption equilibrium. Regeneration experiments show that the adsorption capacity of recycled AB still can reach the level of 96% after four cycles. (C) 2010 Wiley Periodicals, Inc. J Appl Polym Sci 117: 2854-2861, 2010

A novel type of strong base anion-exchange fibers with bagasse as the raw materials was prepared by grafting copolymerization of [2-(methacryloyloxy)ethyl] trimethylammonium chloride on bagasse fiber.The preparation condition,structure and decolorization performance of the strong base anion exchange fibers were investigated.The products were used for dynamic sugar decolorization.The experiments showed that modified bagasse fiber exhibited excellent properties of decolorization,easy regeneration and low cost.Meanwhile,the one-step preparation method is easy to operate,which is of great benefit to industry production.

以聚丙烯纤维（PP）为基体，分别用氯磺酸磺化法、亚硫酸钠磺化法、以及直接接枝含磺酸基单体等三种方法制备强酸型阳离子交换纤维。考察了反应时间、反应温度、磺化剂浓度等反应条件对磺化结果的影响，并比较了三种不同制备方法的优缺点。利用反射红外、热重分析表征了纤维接枝前后及磺化前后相应基团的变化、表面化学结构和产物的热稳定性能。结果表明：三种磺化方法都能使-SO3H接枝到聚丙烯纤维上，得到了预期的产物。使用氯磺酸磺化法磺化效率高，但对基体纤维的机械强度造成较大破坏，而亚硫酸钠磺化法需要较长的反应时间，以PP接枝丙烯酸（AA）与对苯乙烯磺酸钠（SSS）的混合物的方法工艺简单快捷并且环境友好，所得的产物具有良好的机械强度，但强酸部分交换容量较小，需要进一步地优化。

通过辐照接枝的方法，采用对苯乙烯磺酸钠（sodium p-styrene sulfonate，SSS）及丙烯酸（acrylic acid，AA）等单体对聚丙烯（polypropylene，PP）纤维的接枝，制备了高磺酸基含量的双官能离子交换纤维，此方法避免了传统工艺磺化过程中对高浓度混酸（浓硫酸、浓硝酸）或氯磺酸的使用，从而解决了环境污染及易于工业化等难题。考察了制备过程中影响接枝效率的关键因素，利用酸碱滴定、反射红外、热重分析等分析手段表征了纤维的表面基团的含量、化学结构、热稳定性。结果表明，在辐照接枝过程中，AA单体的存在能有效提高纤维表面亲水性能，是SSS接枝于PP上的必要条件。另外，在接枝SSS的过程中加入适量金属盐会由于离子对效应而显著提高反应接枝率。制得的离子交换材料静态交换容量大于5mmol/g，其中磺酸基交换容量大于2mmol/g,产品具有良好的热稳定性，可以在200℃左右的温度下长期使用, 是一种具有工业化应用价值的新型材料制备方法。