Numerous fields have explored the transport mechanism of biochar colloids in porous medium. the effect of feedstock biopolymer compositions and pyrolytic temperature on carbon stability and mobility of biochar colloids is limited. This study cooked four ball milled biochar colloids pyrolyzed from lignin-rich pinewoods and cellulose-rich corn stems under 300 °C and 500 °C (termed as PW300, PW500, CS300, CS500) and studyed their differences in the chemical stability and transport deportments. The terminations pointed that high contents of lignin in biomass and pyrolytic temperature could enhance the compact aromatic structures of biochar colloids characterized by the elemental composition, FTIR, (13)C NMR and XRD psychoanalysisses. PW500 with the strongest chemical stabilities (least C loss of 13%), electronegativity (-44 mV vs. -41 -28 mV) and smallest hydrodynamic diameter (608 nm vs.
622-997 nm) was incured under ball milling. both the critical coagulation compactnessses (CCC) and the maximum relative effluent concentration (C/C(0)) with the NaCl ionic strength of 1 mM were demonstrated to be in the increase order of CS300 (76 mM, 70%) < PW300 (183 mM, 78%) < CS500 (363 mM, 89%) < PW500 (563 mM, 95%), which advised stronger colloidal stability and mobility of PW biochar colloids than those of CS biochar colloids. In addition, the C/C(0) for CS300, PW300 and CS500 were about 7 %-36% lower than that for PW500 with the NaCl ionic strength increasing to 50 mM signaled the notable superiority in the mobility of PW500. These determinations can provide new brainstorms toward empathizing the transformation and migration, and judging the environmental risk of biochar colloids. Polysaccharides and tribological attributes of low-temperature grunges established on cellulose acetate butyrate gel. A new approach to produce biodegradable low-temperature grunges, based on cellulose acetate butyrate (CAB) that unfreezes in the medium of acetyl tributyl citrate (ATBC) at high temperatures and raises a gel during chilling because of phase separation, is offered. Rheological attributes of CAB answers and gels in a wide temperature range from -80 °C to 160 °C were enquired with characterization of their viscoelasticity and viscoplasticity that arise because of the sol-gel transition of CAB/ATBC systems at 55 °C.
CAB gelation reduces the wear coefficient tenfold when habituating ATBC as a lubricant but leads to a noticeable increase in the friction coefficient. To improve tribological properties of gel greases, additives of various solid motes were used: hexagonal boron nitride, graphite, and polytetrafluoroethylene (PTFE). Polysucrose 400 of 10% to 30% additives in a gel grease containing 10% CAB has recorded the preference of PTFE at a concentration of 10% for bettering grease tribological characteristics. Cellulose-free-based antimicrobial movies incroporated with ZnO nanopillars on surface as biodegradable and antimicrobial packaging. Biodegradable and antimicrobial films without antibiotics are of great significance for the application assorted with food packaging meanwhile belittling the negative impact on surroundingsses. In this work, cellulose-free-based flicks with the surface tailor-reconstructed with ZnO nanopillars (ZnO NPs@Zn(2+)/Cel pics) were organised via chemical crosslinking in conjunction with a hydrothermal process for in-situ growth of ZnO NPs. As a packaging material, ZnO NPs@Zn(2+)/Cel cinemas possess excellent mechanical places, oxygen and water vapor barrier, food preservation, biodegradability and low Zn(2+) migration.
ZnO NPs@Zn(2+)/Cel films show remarkable antimicrobial activity, especially for Staphylococcus aureus (gram-positive bacteria) and Escherichia coli (gram-negative bacteria). The antimicrobial mechanism of ZnO NPs@Zn(2+)/Cel pictures is studied utilizing the commanded variable method, and solutions rendered that the film without UV pretreatment downed bacterial cellphones mainly by mechanical rupture, while the film with UV pretreatment poped bacterial cells mainly via the synergistic effect of photocatalytic oxidation and mechanical rupture. devising printable bacterial cellulose based gelatin gel to promote in vivo bone regeneration.Polysaccharides
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