The Experts below are selected from a list of 183 Experts worldwide ranked by ideXlab platform
Zhe Wang - One of the best experts on this subject based on the ideXlab platform.
-
Synthesis of Wood Lignin-Urea-Formaldehyde Resin Adhesive
Advanced Materials Research, 2012Co-Authors: Zhe Wang, Jianbo QuAbstract:Lignin-urea-formaldehyde resin adhesive was synthesized with alkali lignin from gramineae waste Pulping Liquor. Alkali lignin was purified and hydroxymethylated with HCHO and then crosslinked with urea-formaldehyde resin, polyvinyl alcohol and melamine. Results showed that lignin content in purified alkali lignin was 86.91%, both binding strength and free HCHO content of urea-formaldehyde resin synthesized from hydroxymethylated lignin reached the optimum value. The proper lignin amount for preparing resin was 30%, and the binding strength at this condition was 4.56MPa, and free formaldehyde content was 0.049%.
-
Ultrafiltration Treatment and Physical Properties of Ammonia Sulfite Pulping Liquor of Wheat Straw
Advanced Materials Research, 2012Co-Authors: Zhe Wang, Ji Shi ZhangAbstract:Ammonia sulfite Pulping Liquor of wheat straw was treated by ultrafiltration. Experimental results indicated that the membrane with a cut-off of 10kDa was suitable for concentrating wheat straw Liquor and had good anti-fouling property against Pulping Liquor. Permeability of ash turn higher with the increasing of volume reduction at the operating condition of 200 kPa and 25°C, and retentate was concentrated when volume reduced. Influences of ultrafiltration on physical properties of ammonia sulfite Pulping Liquor and its retentate after ultrafiltration were studied. Results showed that retentate had better performances as surfactant, concrete additive and dispersant. Surface tension of 1% lignin solution of retentate was 54.7 mN/m, which was lower than that of the untreated original lignosulfonate by 2.2 mN/m. Dispersing effect of retentate on cement was also investigated, it was found that flowability of neat cement paste improved from 70mm to 102mm.
-
Synthesis of Wood Lignin-Urea-Formaldehyde Resin Adhesive
Advanced Materials Research, 2012Co-Authors: Zhe Wang, Jingwen Xue, Jianbo Qu, Wenxia LiuAbstract:Lignin-urea-formaldehyde resin adhesive was synthesized with alkali lignin from gramineae waste Pulping Liquor. Alkali lignin was purified and hydroxymethylated with HCHO and then crosslinked with urea-formaldehyde resin, polyvinyl alc. and melamine. Results showed that lignin content in purified alkali lignin was 86.91%, both binding strength and free HCHO content of urea-formaldehyde resin synthesized from hydroxymethylated lignin reached the optimum value. The proper lignin amt. for prepg. resin was 30%, and the binding strength at this condition was 4.56MPa, and free formaldehyde content was 0.049%. [on SciFinder(R)]
Jianbo Qu - One of the best experts on this subject based on the ideXlab platform.
-
Synthesis of Wood Lignin-Urea-Formaldehyde Resin Adhesive
Advanced Materials Research, 2012Co-Authors: Zhe Wang, Jianbo QuAbstract:Lignin-urea-formaldehyde resin adhesive was synthesized with alkali lignin from gramineae waste Pulping Liquor. Alkali lignin was purified and hydroxymethylated with HCHO and then crosslinked with urea-formaldehyde resin, polyvinyl alcohol and melamine. Results showed that lignin content in purified alkali lignin was 86.91%, both binding strength and free HCHO content of urea-formaldehyde resin synthesized from hydroxymethylated lignin reached the optimum value. The proper lignin amount for preparing resin was 30%, and the binding strength at this condition was 4.56MPa, and free formaldehyde content was 0.049%.
-
Synthesis of Wood Lignin-Urea-Formaldehyde Resin Adhesive
Advanced Materials Research, 2012Co-Authors: Zhe Wang, Jingwen Xue, Jianbo Qu, Wenxia LiuAbstract:Lignin-urea-formaldehyde resin adhesive was synthesized with alkali lignin from gramineae waste Pulping Liquor. Alkali lignin was purified and hydroxymethylated with HCHO and then crosslinked with urea-formaldehyde resin, polyvinyl alc. and melamine. Results showed that lignin content in purified alkali lignin was 86.91%, both binding strength and free HCHO content of urea-formaldehyde resin synthesized from hydroxymethylated lignin reached the optimum value. The proper lignin amt. for prepg. resin was 30%, and the binding strength at this condition was 4.56MPa, and free formaldehyde content was 0.049%. [on SciFinder(R)]
C. Xiao - One of the best experts on this subject based on the ideXlab platform.
-
soil microbial activity aggregation and nutrient responses to straw Pulping Liquor in corn cropping
Biology and Fertility of Soils, 2007Co-Authors: C. Xiao, R. Bolton, R Stevens, M Fauci, M S Lewis, W T Mckean, D F BezdicekAbstract:The cereal and grass seed cropping systems of the Pacific northwestern USA generate a valuable fiber source for papermaking. Pulping straw with KOH produces black Liquor, an organic waste effluent with potential as a K source and soil amendment. The objectives of this study were to determine if black Liquor from wheat straw Pulping with KOH improves soil quality including soil aggregation, microbial biomass and microbial activity, and corn yield. A 2-year field trial with a randomized complete block design was conducted with black Liquor or KCl applied at 168 and 336 kg K ha−1 at two sites, respectively, planted to corn in Central Washington. Black Liquor applied at rates of 168 and 336 kg K ha−1 slightly increased soil pH by 0.2 to 1.4 units and electrical conductivity by 0.0 to 0.8 dS m−1 at both sites, and significantly increased soil test K compared to the nonamended control by 199 to 368 mg K kg−1 soil in the top 5 cm at Paterson and by 44 to 200 mg K kg−1 soil in the top 5 cm at Prosser. Corn had no yield response to the application of either K sources, black Liquor, or KCl applied at both rates at both sites. Generally, black Liquor applied at these rates increased soil dehydrogenase, β-glucosidase, and arylsulfatase activities, microbial biomass C, and soil wet stable macroaggregates in the top 5-cm soil at both sites. The results of this study suggest that the organic-rich waste Liquor from wheat straw Pulping with KOH may improve soil quality and soil test K without reducing crop productivity.
-
Lignin from rice straw Kraft Pulping: Effects on soil aggregation and chemical properties
Bioresource Technology, 2006Co-Authors: C. Xiao, R. BoltonAbstract:Abstract Lignin contained in Pulping Liquor that is generated during the Pulping process for papermaking is a disposal problem for the pulp and paper industry. Separating lignin and other organic components from Pulping Liquor with inorganic acids may improve its applicability to fields as a beneficial soil amendment while offering a potential disposal alternative. Sulfuric acid-precipitated lignin from rice straw Pulping Liquor applied at rates of 1.67 and 3.34 g C kg −1 soil was incubated to evaluate its effects on soil properties over 8 weeks of incubation. Addition of this acid-precipitated lignin at these rates decreased soil pH by 0.24–0.53 units over 8 weeks of incubation, suggesting that this sulfuric acid-precipitated lignin from Pulping Liquor may have potential as a soil acidifying agent. Soil electrical conductivity (EC) only increased by up to 0.36 dS m −1 , but highest EC levels were less than 4 dS m −1 , indicating that lignin applied at both rates would not cause salinity problems. Application of this lignin increased soil organic C by 1.46 and 3.13 g C kg −1 , and total soil N by 0.07 and 0.17 g N kg −1 over the incubation period. Lignin improved the macroaggregation of >2 mm size fraction, and increased wet microaggregate stability of >2 mm and 0.5–0.25 mm aggregates compared to a nonamended control. The results of this study suggest that this acid-precipitated lignin from Pulping Liquor may have potential as a beneficial soil amendment.
D F Bezdicek - One of the best experts on this subject based on the ideXlab platform.
-
soil microbial activity aggregation and nutrient responses to straw Pulping Liquor in corn cropping
Biology and Fertility of Soils, 2007Co-Authors: C. Xiao, R. Bolton, R Stevens, M Fauci, M S Lewis, W T Mckean, D F BezdicekAbstract:The cereal and grass seed cropping systems of the Pacific northwestern USA generate a valuable fiber source for papermaking. Pulping straw with KOH produces black Liquor, an organic waste effluent with potential as a K source and soil amendment. The objectives of this study were to determine if black Liquor from wheat straw Pulping with KOH improves soil quality including soil aggregation, microbial biomass and microbial activity, and corn yield. A 2-year field trial with a randomized complete block design was conducted with black Liquor or KCl applied at 168 and 336 kg K ha−1 at two sites, respectively, planted to corn in Central Washington. Black Liquor applied at rates of 168 and 336 kg K ha−1 slightly increased soil pH by 0.2 to 1.4 units and electrical conductivity by 0.0 to 0.8 dS m−1 at both sites, and significantly increased soil test K compared to the nonamended control by 199 to 368 mg K kg−1 soil in the top 5 cm at Paterson and by 44 to 200 mg K kg−1 soil in the top 5 cm at Prosser. Corn had no yield response to the application of either K sources, black Liquor, or KCl applied at both rates at both sites. Generally, black Liquor applied at these rates increased soil dehydrogenase, β-glucosidase, and arylsulfatase activities, microbial biomass C, and soil wet stable macroaggregates in the top 5-cm soil at both sites. The results of this study suggest that the organic-rich waste Liquor from wheat straw Pulping with KOH may improve soil quality and soil test K without reducing crop productivity.
Wenxia Liu - One of the best experts on this subject based on the ideXlab platform.
-
Synthesis of Wood Lignin-Urea-Formaldehyde Resin Adhesive
Advanced Materials Research, 2012Co-Authors: Zhe Wang, Jingwen Xue, Jianbo Qu, Wenxia LiuAbstract:Lignin-urea-formaldehyde resin adhesive was synthesized with alkali lignin from gramineae waste Pulping Liquor. Alkali lignin was purified and hydroxymethylated with HCHO and then crosslinked with urea-formaldehyde resin, polyvinyl alc. and melamine. Results showed that lignin content in purified alkali lignin was 86.91%, both binding strength and free HCHO content of urea-formaldehyde resin synthesized from hydroxymethylated lignin reached the optimum value. The proper lignin amt. for prepg. resin was 30%, and the binding strength at this condition was 4.56MPa, and free formaldehyde content was 0.049%. [on SciFinder(R)]
