Hydroxyethyl celluloseni ikintu cy'ingenzi kiva muri selulosi. Bitewe n'inyungu z'umutungo kamere mwinshi, ushobora kongera gukoreshwa, udashobora kubora, ntugira uburozi, uhuza neza n'ibinyabuzima, ndetse n'umusaruro mwinshi, ubushakashatsi n'ikoreshwa byakuruye abantu benshi. . Agaciro k'ubushyuhe ni igipimo cy'ingenzi cyane cya selulosi ya hydroxyethyl. Muri iyi nyandiko, selulosi ya hydroxyethyl ifite agaciro ka viscosity kari hejuru ya 5×104mPa·s n'agaciro k'ivu kari munsi ya 0.3% yateguwe hakoreshejwe uburyo bwo guhuza liquid-phase binyuze mu buryo bwa alkalizing na etherification mu ntambwe ebyiri.
Uburyo bwo gutunganya alkali ni uburyo bwo gutegura cellulose ya alkali. Muri iyi nyandiko, hakoreshwa uburyo bubiri bwo gutunganya alkali. Uburyo bwa mbere ni ugukoresha acetone nk'umuti ugabanya ubushyuhe. Ibikoresho bya cellulose bishyirwa mu buryo butaziguye mu gipimo runaka cya sodium hydroxide amazi. Nyuma yo gukora reaction ya basification, hongerwamo ikintu gihindura etherification kugira ngo gikore reaction ya etherification. Uburyo bwa kabiri ni uko ibikoresho bya cellulose biba bya alkali mu gisubizo cy'amazi cya sodium hydroxide na urea, kandi cellulose ya alkali yateguwe n'ubu buryo igomba gukandwa kugira ngo ikuremo lye irenze mbere y'uko reaction ya etherification ikorwa. Alkali cellulose yateguwe hakoreshejwe uburyo butandukanye yasesenguwe hakoreshejwe infrared spectroscopy na X-ray diffraction. Dukurikije imiterere y'ibicuruzwa byateguwe na reaction ya etherification, uburyo bwo guhitamo buragenwa.
Kugira ngo hamenyekane uburyo bwiza bwo gukora etherification, habanje gusesengura uburyo bwo gukora reactive ya antioxidant, lye na aside glacial asetic muri etherification reaction. Hanyuma hagakorwa gahunda y'igerageza ya single factor reaction, hagenwa ibintu bigira ingaruka zikomeye ku mikorere ya hydroxyethyl cellulose yateguwe, kandi hagakoreshwa viscosity ya 2% y'umuti w'amazi w'umuti nk'igipimo cy'icyitegererezo. Ibisubizo by'igerageza bigaragaza ko ibintu nk'ingano ya diluent yatoranijwe, ingano ya ethylene oxide yongewemo, igihe cya alkalize, ubushyuhe n'igihe cya reaction ya mbere, ubushyuhe n'igihe cya reaction ya kabiri byose bigira ingaruka zikomeye ku mikorere y'umuti. Gahunda y'igerageza ya orthogonal ifite ibintu birindwi n'urwego rutatu yarakozwe, kandi curve y'ingaruka yakuwe mu bisubizo by'igerageza yashoboraga gusesengura ibintu by'ibanze n'ibya kabiri hamwe n'icyerekezo cy'ingaruka za buri kintu. Kugira ngo hategurwe ibicuruzwa bifite agaciro ka viscosity kari hejuru, hateguwe gahunda y'igerageza inoze, maze gahunda nziza yo gutegura hydroxyethyl cellulose iramenyekana binyuze mu bisubizo by'igerageza.
Imiterere y'umuvuduko mwinshi wateguweselulose ya hydroxyethylByasesenguwe kandi bipimwa, harimo kumenya ubushyuhe, ingano y'ivu, uburyo urumuri rutanga, ingano y'ubushuhe, nibindi, binyuze muri spectroscopy ya infrared, resonance ya magnetic nuclear, chromatography ya gaz, diffraction ya X-ray, isesengura ry'ubushyuhe bwa Thermogravimetric-differential n'ubundi buryo bwo kugena imiterere y'ibicuruzwa bikoreshwa mu gusesengura no kugaragaza imiterere y'ibicuruzwa, ubunini bw'ibicuruzwa, urugero rwo gusimbuza molar, crystallinity, ubushyuhe buhamye, nibindi. Uburyo bwo gupima bureba amahame ya ASTM.
Hydroxyethyl cellulose, ikomoka kuri cellulose y'ingenzi, yakunzwe cyane kubera umutungo kamere wayo mwinshi, ishobora kongera gukoreshwa, ibora, ntigira uburozi, ihura n'ibinyabuzima kandi itanga umusaruro mwinshi. Uburemere bwa hydroxyethyl cellulose ni ikimenyetso cy'ingenzi cyane cy'imikorere yayo. Uburemere bwa hydroxyethyl cellulose yateguwe buri hejuru ya 5×104mPa·s, kandi ivu riri munsi ya 0.3%.
Muri iyi nyandiko, hydroxyethyl cellulose ifite viscosity nyinshi yateguwe hakoreshejwe uburyo bwo guhuza ibintu hakoreshejwe liquid-phase binyuze mu gutunganya no gukwirakwiza. Uburyo bwo gutunganya ni ugutegura cellulose ya alkali. Hitamo uburyo bubiri bwo gutunganya. Bumwe ni uko ibikoresho bya cellulose bishyirwamo acetone nk'umusemburo mu gisubizo cya sodium hydroxide y'amazi, hanyuma bigakorwaho etherification hamwe n'ikintu gitanga etherifying. Ubundi ni uko ibikoresho bya cellulosic bishyirwamo aqueous sodium hydroxide na urea. Alkali nyinshi muri cellulose ya alkali igomba gukurwaho mbere yo gukora reaction. Muri iyi nyandiko, cellulose zitandukanye za alkali zigwa hakoreshejwe infrared spectroscopy na X-ray diffraction. Amaherezo, uburyo bwa kabiri bukoreshwa hakurikijwe imiterere y'ibicuruzwa bya etherification.
Kugira ngo hamenyekane intambwe zo gutegura etherification, hakozwe ubushakashatsi ku buryo aside acetic, alkali na glacial reaction ya antioxidant, aside acetic na glacial mu gihe cyo kurya. Ibintu bigira ingaruka ku itegurwa rya hydroxyethyl cellulose byagenwe n'igerageza rya single factor. Hashingiwe ku gaciro ka viscosity k'umusaruro mu gisubizo cy'amazi cya 2%. Ibisubizo by'igerageza bigaragaza ko ingano ya diluent, ingano ya ethylene oxide, igihe cya alkalize, ubushyuhe n'igihe cyo kongera amazi mu mubiri bwa mbere n'ubwa kabiri bigira ingaruka zikomeye ku mikorere y'umusaruro. Uburyo bw'ibintu birindwi n'urwego rutatu bwakoreshejwe kugira ngo hamenyekane uburyo bwiza bwo gutegura.
Dusesengura imiterere y'ibyateguweselulose ya hydroxyethyl, harimo ubushyuhe, ivu, uburyo urumuri rutanga, ubushuhe, nibindi. Imiterere y’imiterere, uburyo ibintu bihinduka, uburyo ibintu bihinduka, uburyo ibintu bihinduka, uburyo kristali ihinduka n’uburyo ubushyuhe buhagaze byaganiriweho hifashishijwe infrared, resonance ya magnetic nuclear, chromatography ya gaz, diffraction ya X-ray, DSC na DAT, kandi uburyo bwo gupima bwakoresheje amahame ya ASTM.
Igihe cyo kohereza: 25 Mata 2024