以两种人工钠化膨润土为研究对象,探讨了文献胶质价测试方法的不合理性、取土量和MgO量这两个关键因素。实验结果表明:用常规100 mL量筒测胶质价时,取土量和MgO量影响较大,有必要针对具体试样做条件试验,最佳条件是1#钠土为取3.00 g土、...以两种人工钠化膨润土为研究对象,探讨了文献胶质价测试方法的不合理性、取土量和MgO量这两个关键因素。实验结果表明:用常规100 mL量筒测胶质价时,取土量和MgO量影响较大,有必要针对具体试样做条件试验,最佳条件是1#钠土为取3.00 g土、0.2 g MgO,2#钠土为取5.00 g土、0.33 g MgO。展开更多
Commercially,assembly-directed packing of hollow tube-like papermaking fibers with widths of roughly 10–50μm)into sustainable microfibrous bioassemblies(i.e.,paper-based products)starts with a dilute fiber slurry.In...Commercially,assembly-directed packing of hollow tube-like papermaking fibers with widths of roughly 10–50μm)into sustainable microfibrous bioassemblies(i.e.,paper-based products)starts with a dilute fiber slurry.In this process,a huge amount of water is required to disperse and transport fibers,which also facilitates colloidal interactions and formation of interfiber bonds.To form bioassemblies in their dry states,unit operations associated with dewatering and drying are routine practices,and treatment of the generated wastewater is a necessity.We herein present a facile,easily scalable concept of converting fiber slurry into dynamic hydrogels by using chemical additives(similar to papermaking wet-end additives),but without water removal.We used a typical group of additives as an example in an attempt to demonstrate the applicability of the concept.With boron-based dynamic chemistry as a key theoretical foundation,the combination of crosslinking and hydrogen bonding can lead to the formation of phase-reversible,self-healable,and stretchable hydrogels.Essentially,the characteristics of hydrogels are facilely tunable,and process parameters such as polymer dosage are rather critical.It is worth noting that fibers can act as a structural skeleton or mechanical support for tailorable design of hydrogels.The concept demonstrated in this study provides insights into value-added utilization of mass-producible biopolymeric fibers in accordance with existing industrial facilities.Fiber-based hydrogels would find use in diversified applications:toys,3D/4D printing materials,soft robots,drug delivery systems,among others.展开更多
文摘以两种人工钠化膨润土为研究对象,探讨了文献胶质价测试方法的不合理性、取土量和MgO量这两个关键因素。实验结果表明:用常规100 mL量筒测胶质价时,取土量和MgO量影响较大,有必要针对具体试样做条件试验,最佳条件是1#钠土为取3.00 g土、0.2 g MgO,2#钠土为取5.00 g土、0.33 g MgO。
基金Fundamental Research Funds for the Central Universities of China(No.2572018CG04)National Natural Science Foundation of China(No.218708046)+1 种基金Program for New Century Excellent Talents in University(No.NCET-12-0811)Longjiang Scholars Program.
文摘Commercially,assembly-directed packing of hollow tube-like papermaking fibers with widths of roughly 10–50μm)into sustainable microfibrous bioassemblies(i.e.,paper-based products)starts with a dilute fiber slurry.In this process,a huge amount of water is required to disperse and transport fibers,which also facilitates colloidal interactions and formation of interfiber bonds.To form bioassemblies in their dry states,unit operations associated with dewatering and drying are routine practices,and treatment of the generated wastewater is a necessity.We herein present a facile,easily scalable concept of converting fiber slurry into dynamic hydrogels by using chemical additives(similar to papermaking wet-end additives),but without water removal.We used a typical group of additives as an example in an attempt to demonstrate the applicability of the concept.With boron-based dynamic chemistry as a key theoretical foundation,the combination of crosslinking and hydrogen bonding can lead to the formation of phase-reversible,self-healable,and stretchable hydrogels.Essentially,the characteristics of hydrogels are facilely tunable,and process parameters such as polymer dosage are rather critical.It is worth noting that fibers can act as a structural skeleton or mechanical support for tailorable design of hydrogels.The concept demonstrated in this study provides insights into value-added utilization of mass-producible biopolymeric fibers in accordance with existing industrial facilities.Fiber-based hydrogels would find use in diversified applications:toys,3D/4D printing materials,soft robots,drug delivery systems,among others.
