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学者姓名：陈秋艳
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Abstract ：
To achieve a breakthrough in the application of cold caustic extraction, it is necessary to limit the amount of alkali and to dissolve the hemicelluloses sufficiently. A NaOH/ZnO aqueous solution system was used to separate hemicelluloses from bleached bamboo pulp efficiently and selectively. The NaOH/ZnO process proved to be more successful in the removal of hemicelluloses. Under the conditions of 0.5% ZnO concentration, the NaOH/ZnO aqueous solution system decreased the hemicelluloses content to 4.99%, which was lower than 7.46% of the control sample treated with NaOH alone at the same 7% NaOH concentration. Correspondingly, the NaOH/ZnO system led to an increase in alpha-cellulose content with significantly improved hemicelluloses removal efficiency and selectivity. As a result of the NaOH/ZnO process, a higher degree of polymerization was observed, and the cellulose I structure was always maintained, which provided good benefits for the subsequent utilization of cellulose.
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| GB/T 7714 | Chen, Qiuyan , Ma, Xiaojuan , Li, Jianguo et al. Enhancing the selective separation of hemicelluloses from cellulosic fibers in NaOH/ZnO aqueous solution [J]. | WOOD SCIENCE AND TECHNOLOGY , 2023 , 57 (2) : 375-387 . |
| MLA | Chen, Qiuyan et al. "Enhancing the selective separation of hemicelluloses from cellulosic fibers in NaOH/ZnO aqueous solution" . | WOOD SCIENCE AND TECHNOLOGY 57 . 2 (2023) : 375-387 . |
| APA | Chen, Qiuyan , Ma, Xiaojuan , Li, Jianguo , Huang, Hai , Cao, Shilin , Huang, Liulian . Enhancing the selective separation of hemicelluloses from cellulosic fibers in NaOH/ZnO aqueous solution . | WOOD SCIENCE AND TECHNOLOGY , 2023 , 57 (2) , 375-387 . |
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研究了6种金属离子（Ca~(2+)、Cu~(2+)、Fe~(2+)、Fe~(3+)、Mn~(2+)及Mg~(2+)）对竹溶解浆Fock反应性能的影响，再利用HCl单独酸处理及引入螯合剂二乙烯三胺五乙酸（DTPA）的酸处理，探讨了p H值及DTPA用量对竹溶解浆Fock反应性能、灰分、白度及聚合度等的影响。结果表明，浆中的金属离子，尤其是铁离子，显著降低竹溶解浆的Fock反应性能。降低p H值有利于竹溶解浆反应性能的提高，与此同时，竹浆灰分含量及聚合度逐渐降低，白度不断提高。在最佳p H值3.0的环境下，Fock反应性能由未处理时的68.3%提高至72.7%，而酸处理进一步联合DTPA对提高反应性能的效果甚微。
Keyword ：
反应性能 反应性能 竹溶解浆 竹溶解浆 螯合剂 螯合剂 酸处理 酸处理 金属离子 金属离子
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| GB/T 7714 | 陈秋艳 , 黄六莲 . 金属离子及酸处理对竹溶解浆反应性能的影响 [J]. | 中国造纸 , 2022 , 41 (08) : 45-48 . |
| MLA | 陈秋艳 et al. "金属离子及酸处理对竹溶解浆反应性能的影响" . | 中国造纸 41 . 08 (2022) : 45-48 . |
| APA | 陈秋艳 , 黄六莲 . 金属离子及酸处理对竹溶解浆反应性能的影响 . | 中国造纸 , 2022 , 41 (08) , 45-48 . |
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In this work, four different media including aqueous water, acetic acid (AA), HCl, and H2SO4 were used to hydrolyze holocelluloses. The decomposition of holocellulose and pseudo-lignin formation are discussed. It was found that AA and water are almost comparable in catalyzing holocellulose (HC) decomposition but the former can promote sugar decomposition and therefore pseudo-lignin formation. In contrast, HCl and H2SO4 are more efficient in HC decomposition and furfural formation; specifically, HCl is extremely potent for HC decomposition and furfural formation but inert for pseudo-lignin formation. The results confirmed that both hydrogen ions and anions would affect the carbohydrate decomposition; in this case, further study revealed that only concentrated Cl- in the water system can promote the furfural formation but Cl- with relative low concentration will inhibit pseudo-lignin formation. It is proved that, Cl- can stabilize the intermediates that facilitate the pseudo lignin formation. (c) 2021 Society of Industrial Chemistry and John Wiley & Sons Ltd.
Keyword ：
acetic acid acetic acid H2SO4 H2SO4 HCl HCl holocelluloses holocelluloses lignin lignin pseudo‐ pseudo‐ water water
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| GB/T 7714 | Zhang, Hui , Wang, Xinping , Chen, Yanxi et al. Insights into the effect of hydrolysis medium on the holocellulose decomposition, furfural, and pseudo-lignin formation [J]. | BIOFUELS BIOPRODUCTS & BIOREFINING-BIOFPR , 2021 , 15 (4) : 1046-1053 . |
| MLA | Zhang, Hui et al. "Insights into the effect of hydrolysis medium on the holocellulose decomposition, furfural, and pseudo-lignin formation" . | BIOFUELS BIOPRODUCTS & BIOREFINING-BIOFPR 15 . 4 (2021) : 1046-1053 . |
| APA | Zhang, Hui , Wang, Xinping , Chen, Yanxi , Chen, Qiuyan , Li, Shaolian , Shi, Yinan et al. Insights into the effect of hydrolysis medium on the holocellulose decomposition, furfural, and pseudo-lignin formation . | BIOFUELS BIOPRODUCTS & BIOREFINING-BIOFPR , 2021 , 15 (4) , 1046-1053 . |
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Because of the wide adaptability to samples in various states, UV-vis diffuse reflectance spectroscopy has attracted increasing attention. In the present work, it was firstly used to analyze lignocellulosic biomass material and develop the possible use for rapid detection. Through the analysis of the spectra, it was observed that the extremely pure microcrystalline cellulose, filter paper and purchased xylan have almost no absorption, whereas the chemical pulps, dissolving pulps and extracted hemicellulose with residual trace impurities show a weak absorption in the range from 200 nm to 400 nm. The prominent sensitivity to the trace impurities, such as residual lignin, makes the UV-vis diffuse reflectance spectroscopy a potential tool for the rapid detection of the purity of cellulose and hemicellulose. As for lignin, the spectrum is characterized by a broader strong absorption at 250-280 nm and 280-350 nm, of which the latter is similar to UV absorption spectra. In addition, UV-vis diffuse reflectance spectroscopy can be potentially used in monitoring lignin-like substance formation in the biomass engineering.
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| GB/T 7714 | Zhang, Hui , Wang, Xinping , Wang, Jun et al. UV-visible diffuse reflectance spectroscopy used in analysis of lignocellulosic biomass material [J]. | WOOD SCIENCE AND TECHNOLOGY , 2020 , 54 (4) : 837-846 . |
| MLA | Zhang, Hui et al. "UV-visible diffuse reflectance spectroscopy used in analysis of lignocellulosic biomass material" . | WOOD SCIENCE AND TECHNOLOGY 54 . 4 (2020) : 837-846 . |
| APA | Zhang, Hui , Wang, Xinping , Wang, Jun , Chen, Qiuyan , Huang, Hai , Huang, Liulian et al. UV-visible diffuse reflectance spectroscopy used in analysis of lignocellulosic biomass material . | WOOD SCIENCE AND TECHNOLOGY , 2020 , 54 (4) , 837-846 . |
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The development of effective separation of hemicelluloses from fully bleached cellulosic pulp fibers is conducive to the development and utilization of high value-added cellulose products. In this study, Turkey Red Oil (sulfonated castor oil) (TRO), a renewable source, was proposed to facilitate hemicelluloses separation from chemical pulp in cold caustic extraction (CCE). As expected, TRO application can significantly promote hemicelluloses separation in the CCE process. By contrast to the traditional CCE process, TRO/CCE could decrease the hemicelluloses content from 9.1 to 6.1%, while the hemicelluloses removal selectivity increased from 72.5 to 82.3% and efficiency, increased from 52.4 to 68.1%. Moreover, without sacrificing hemicelluloses removal, the TRO utilization can reduce the alkaline consumption and therefore preserve the cellulose I crystal from conversion to cellulose II. Additionally, the TRO/CCE procedure made the cellulose fiber more flexible and more accessible to react with CS2 and therefore a high Fock reactivity.
Keyword ：
Cold caustic extraction Cold caustic extraction Hemicelluloses separation Hemicelluloses separation Reactivity Reactivity Turkey red oil Turkey red oil Wettability Wettability
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| GB/T 7714 | Chen, Qiuyan , Wang, Xinping , Huang, Hai et al. Turkey Red oil - An effective alkaline extraction booster for enhanced hemicelluloses separation from bamboo kraft pulp and improved fock reactivity of resultant dissolving pulp [J]. | INDUSTRIAL CROPS AND PRODUCTS , 2020 , 145 . |
| MLA | Chen, Qiuyan et al. "Turkey Red oil - An effective alkaline extraction booster for enhanced hemicelluloses separation from bamboo kraft pulp and improved fock reactivity of resultant dissolving pulp" . | INDUSTRIAL CROPS AND PRODUCTS 145 (2020) . |
| APA | Chen, Qiuyan , Wang, Xinping , Huang, Hai , Cao, Shilin , Chen, Lihui , Huang, Liulian et al. Turkey Red oil - An effective alkaline extraction booster for enhanced hemicelluloses separation from bamboo kraft pulp and improved fock reactivity of resultant dissolving pulp . | INDUSTRIAL CROPS AND PRODUCTS , 2020 , 145 . |
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In this work, a simple two-stage pretreatment (TSP) was utilized to improve hemicellulose separation and alleviate lignin condensation and therefore facilitate hemicellulose extraction and subsequent kraft pulping. In contrast to single-stage pretreatment, TSP showed a significant improvement for hemicellulose extraction and hemicellulose degradation and provided an almost identical cellulose loss. The hemicellulose separation efficiency was significantly improved using TSP with 60 min first followed by 30 min. More importantly, proper pretreatment is beneficial to the subsequent delignification; extensive pretreatment can retard delignification.
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| GB/T 7714 | Ma, Xiaojuan , Zhang, Hui , Chen, Qiuyan et al. Comparison of single-stage and two-stage hydrothermal pretreatments for improving hemicellulose separation from bamboo chips [J]. | WOOD SCIENCE AND TECHNOLOGY , 2020 , 54 (3) : 547-557 . |
| MLA | Ma, Xiaojuan et al. "Comparison of single-stage and two-stage hydrothermal pretreatments for improving hemicellulose separation from bamboo chips" . | WOOD SCIENCE AND TECHNOLOGY 54 . 3 (2020) : 547-557 . |
| APA | Ma, Xiaojuan , Zhang, Hui , Chen, Qiuyan , Huang, Hai , Cheng, Haitao , Huang, Liulian et al. Comparison of single-stage and two-stage hydrothermal pretreatments for improving hemicellulose separation from bamboo chips . | WOOD SCIENCE AND TECHNOLOGY , 2020 , 54 (3) , 547-557 . |
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为提高溶解浆进行粘胶纤维产品生产的加工性能及减少二硫化碳的排放,采用PFI(papirindustriens forsknings institut)磨打浆和瓦利打浆机打浆这2种湿法机械处理,以改善竹溶解浆的反应性能。以预水解硫酸盐法竹溶解浆为原料,考察PFI磨打浆及瓦利打浆机打浆对溶解浆反应性能及纤维形态的影响,并对同等打浆度条件下的2种湿法机械处理的效果进行比较。PFI磨和瓦利打浆机分别在打浆度为60.5°SR(15 000 r)及36.4°SR(30 min)的优化工艺条件下,Fock反应性能从68.3%分别提高到73.2%和84.0%,粘胶过滤性能由"不通过"到粘胶过滤值分别为3 196.1 s和2 115.6 s。同时,上述2种处理方式均使纤维粗度和长度下降,细小纤维含量、比表面积和总孔隙量增加,且使聚合度损失小。同等打浆度条件下,基于瓦利打浆机对纤维更多的剪切行为,瓦利打浆机打浆对反应性能的提高效果更为显著。
Keyword ：
反应性能 反应性能 打浆 打浆 粘胶级竹溶解浆 粘胶级竹溶解浆 纤维形态 纤维形态 纤维比表面积 纤维比表面积
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| GB/T 7714 | 陈秋艳 , 马晓娟 , 黄六莲 . 湿法机械处理改善粘胶级竹溶解浆反应性能的研究 [J]. | 西北林学院学报 , 2020 , 35 (04) : 223-228 . |
| MLA | 陈秋艳 et al. "湿法机械处理改善粘胶级竹溶解浆反应性能的研究" . | 西北林学院学报 35 . 04 (2020) : 223-228 . |
| APA | 陈秋艳 , 马晓娟 , 黄六莲 . 湿法机械处理改善粘胶级竹溶解浆反应性能的研究 . | 西北林学院学报 , 2020 , 35 (04) , 223-228 . |
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采用太古油(TRO)、聚氧乙烯蓖麻油(PCO)、聚醚多元醇(PP)3种表面活性剂对竹溶解浆原料进行处理,以改善竹溶解浆的反应性能;考察了不同表面活性剂及其用量对竹溶解浆Fock反应性能及黏胶过滤性能的影响,得到竹溶解浆反应性能改善效果最佳的表面活性剂及其优化用量,并研究了Fock反应性能与黏胶过滤性能的关系;分析及比较了上述3种表面活性剂在最优条件下对竹溶解浆的孔隙结构及比表面积、碱液的表面张力、黏胶流变行为的影响,揭示了表面活性剂改善竹溶解浆反应性能的机理。结果表明,TRO对竹溶解浆反应性能的改善效果最优,最佳用量为1.5%,此时,Fock反应性能及黏胶过滤值分别为81.7%和96.9 s,且当Fock反应性能超过77%时,所得的黏胶均能够达到过滤要求;TRO对竹溶解浆比表面积及孔隙结构的改善效果最好,并显著降低碱液的表面张力和提高黏胶的表观黏度,这与竹溶解浆反应性能的改善一致。
Keyword ：
反应性能 反应性能 竹溶解浆 竹溶解浆 表面张力 表面张力 表面活性剂 表面活性剂 黏胶过滤性能 黏胶过滤性能
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| GB/T 7714 | 陈秋艳 , 马晓娟 , 黄六莲 et al. 表面活性剂改善黏胶级竹溶解浆的反应性能 [J]. | 中国造纸学报 , 2019 , 34 (03) : 1-5 . |
| MLA | 陈秋艳 et al. "表面活性剂改善黏胶级竹溶解浆的反应性能" . | 中国造纸学报 34 . 03 (2019) : 1-5 . |
| APA | 陈秋艳 , 马晓娟 , 黄六莲 , 曹石林 , 苗庆显 . 表面活性剂改善黏胶级竹溶解浆的反应性能 . | 中国造纸学报 , 2019 , 34 (03) , 1-5 . |
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采用盐酸及乙二胺四乙酸二钠(EDTA)、六偏磷酸钠(SHMP)、二乙烯三胺五乙酸(DTPA)对溶解浆进行酸处理,分析pH值、时间,以及基于优化盐酸处理工艺研究的螯合剂种类、用量,对溶解浆Fock反应性能、得率、灰分、白度及聚合度的影响;探讨酸处理前后溶解浆的孔隙结构、比表面积、纤维形态及相对分子质量分布的变化.结果表明,在处理温度为50℃时,酸处理的最佳工艺条件为:pH值3.0,处理时间45 min,DTPA用量3.0%.在此工艺条件下,Fock反应性能由67.23%提高至74.12%,得到更为蓬松的物理结构.纤维表面在纵向出现分裂或裂开现象,增加了更多的额外接触面积.酸处理使纤维素相对分子质量下降,多分散指数(PDI)由5.22下降至4.91,聚合度分布更加均匀.
Keyword ：
反应性能 反应性能 孔隙结构 孔隙结构 相对分子质量分布 相对分子质量分布 竹溶解浆 竹溶解浆 酸处理 酸处理
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| GB/T 7714 | 陈秋艳 , 苗庆显 , 曹石林 et al. 酸处理改善竹溶解浆反应性能的研究 [J]. | 福建农林大学学报(自然科学版) , 2017 , 46 (03) : 351-355 . |
| MLA | 陈秋艳 et al. "酸处理改善竹溶解浆反应性能的研究" . | 福建农林大学学报(自然科学版) 46 . 03 (2017) : 351-355 . |
| APA | 陈秋艳 , 苗庆显 , 曹石林 , 陈礼辉 , 黄六莲 . 酸处理改善竹溶解浆反应性能的研究 . | 福建农林大学学报(自然科学版) , 2017 , 46 (03) , 351-355 . |
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纤维素的反应性能在粘胶纤维的制备过程中发挥着重要作用。采用纤维素酶处理用以提高竹溶解浆的反应性能,考察酶用量、反应时间及浆浓度3个因素对聚合度、Fock反应性能、α-纤维素及竹浆得率的影响,揭示纤维素酶提高反应性能的机理。结果表明,在pH值4.6及温度55℃的环境下,纤维素酶处理的最优工艺条件为酶用量0.1U/g、反应时间60min、浆浓度5%,Fock反应性能由69.5%提高至88.2%,同时聚合度仅由643降至593。α-纤维素、得率和相对分子质量分布(MWD)也表明了纤维素酶处理可明显提高反应性能却仅有微小的聚合度下降。这些结果主要是由于酶的剥皮或侵蚀效应部分破坏了纤维素纤维的初生壁,形成了更多孔隙,导致浆料纤维可及度提高。比表面吸附仪、扫描电子显微镜(SEM)及凝胶渗透色谱仪(GPC)测试结果表明了纤维素纤维形态的改变,这支持了酶处理后浆料可及度提高的结论。
Keyword ：
反应性能 反应性能 可及度 可及度 竹溶解浆 竹溶解浆 纤维素酶 纤维素酶 聚合度 聚合度
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| GB/T 7714 | 陈秋艳 , 苗庆显 , 马晓娟 et al. 纤维素酶提高竹溶解浆反应性能的研究 [J]. | 西北林学院学报 , 2017 , 32 (05) : 208-212,288 . |
| MLA | 陈秋艳 et al. "纤维素酶提高竹溶解浆反应性能的研究" . | 西北林学院学报 32 . 05 (2017) : 208-212,288 . |
| APA | 陈秋艳 , 苗庆显 , 马晓娟 , 黄六莲 . 纤维素酶提高竹溶解浆反应性能的研究 . | 西北林学院学报 , 2017 , 32 (05) , 208-212,288 . |
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