Hydroxyethyl selileni ingirakamaro ya selile. Bitewe nibyiza byumutungo wibanze mwinshi, ushobora kuvugururwa, ibinyabuzima bishobora kwangirika, bidafite uburozi, biocompatibilité nziza, numusaruro mwinshi, ubushakashatsi nubushakashatsi bwarwo bwitabiriwe cyane. . Agaciro ka Viscosity nigikorwa cyingenzi cyane cyerekana imikorere ya hydroxyethyl selile. Muri iyi nyandiko, hydroxyethyl selulose ifite agaciro ka viscosity hejuru ya 5 × 104mPa · s hamwe nagaciro kivu kari munsi ya 0.3% byateguwe nuburyo bwo guhuza ibice byamazi binyuze muri alkalisation na etherification intambwe ebyiri.
Inzira ya alkalisation ni inzira yo gutegura selile ya alkali. Muri iyi nyandiko, hakoreshejwe uburyo bubiri bwa alkalisation. Uburyo bwa mbere nugukoresha acetone nkururimi. Ibikoresho fatizo bya selile bifite ishingiro muburyo butandukanye bwa sodium hydroxide yumuti wamazi. Nyuma yo gushingira kubikorwa byakozwe, agent ya etherifying yongeweho kugirango ikore neza reaction ya etherification. Uburyo bwa kabiri ni uko ibikoresho fatizo bya selile bihindurwamo igisubizo cyamazi ya hydroxide ya sodium na urea, kandi selile ya alkali selile yateguwe nubu buryo igomba gukomwa kugirango ikureho lye irenze mbere ya etherification reaction. Alkali selulose yateguwe nuburyo butandukanye yasesenguwe na infragre spekitroscopi na X-ray itandukanya. Ukurikije imiterere yibicuruzwa byateguwe na etherification reaction, uburyo bwo guhitamo bwaragenwe.
Kugirango hamenyekane uburyo bwiza bwa synthesis ya etherification, uburyo bwa reaction ya antioxydeant, lye na glacial acetic acide muri etherification yabanje gusesengurwa. Noneho tegura gahunda yubushakashatsi yibintu bimwe byerekana, umenye ibintu bigira ingaruka zikomeye kumikorere ya hydroxyethyl selulose yateguwe, hanyuma ukoreshe ubwiza bwibisubizo byibicuruzwa 2% byamazi nkibipimo ngenderwaho. Ibisubizo byubushakashatsi byerekana ko ibintu nkibintu byatoranijwe byatoranijwe, ingano ya okiside ya Ethylene yongeweho, igihe cya alkalisation, ubushyuhe nigihe cya reaction ya mbere, ubushyuhe nigihe cya reaction ya kabiri byose bigira ingaruka zikomeye kumikorere ibicuruzwa. Igishushanyo mbonera cya orthogonal hamwe nibintu birindwi ninzego eshatu zarakozwe, kandi ingaruka zifatika zivuye mubisubizo byubushakashatsi zishobora gusesengura mu buryo bweruye ibintu byibanze nubwa kabiri hamwe ningaruka za buri kintu. Kugirango utegure ibicuruzwa bifite agaciro keza cyane, hashyizweho gahunda yubushakashatsi yateguwe, kandi gahunda nziza yo gutegura hydroxyethyl selulose yaje kugenwa binyuze mubisubizo byubushakashatsi.
Ibiranga byateguwe hejuru-viscosityhydroxyethyl selilezasesenguwe kandi zirageragezwa, harimo kumenya ubukonje, ibirimo ivu, ihererekanyabubasha ry’umucyo, ibirimo ubuhehere, n’ibindi, binyuze muri infragre spekitroscopi, magnetiki resonance ya gaze, chromatografiya, X-ray itandukanya, isesengura ry’ubushyuhe bwa Thermogravimetric-itandukanye n’ubundi buryo bwo kuranga gusesengura no kuranga imiterere yibicuruzwa, uburinganire busimburana, impamyabumenyi yo gusimbuza umubyimba, kristu, ubushyuhe bwumuriro, nibindi. Uburyo bwikizamini bwerekeza kubipimo bya ASTM.
Hydroxyethyl selulose, ingirakamaro ya selile ikomoka kuri selile, yakunze kwitabwaho bitewe nubutunzi bwinshi bwibikoresho fatizo, ibishobora kuvugururwa, ibinyabuzima bishobora kwangirika, bidafite ubumara, ibinyabuzima, kandi bitanga umusaruro mwinshi. Ubukonje bwa hydroxyethyl selile ni ikimenyetso cyingenzi cyerekana imikorere yacyo. Ubukonje bwa hydroxyethyl selile yateguwe iri hejuru ya 5 × 104mPa · s, kandi ivu riri munsi ya 0.3%.
Muri iyi nyandiko, hydroxyethyl selulose-yuzuye cyane-yateguwe hakoreshejwe uburyo bwa synthesis ya fluid-fase binyuze muri alkalisation na etherification. Inzira ya alkalisation ni ugutegura selile ya alkali. Hitamo muburyo bubiri bwa alkalisation. Imwe muriyo ni uko ibikoresho bya selile bihujwe na acetone mu buryo butaziguye mu mazi ya sodium hydroxide yo mu mazi, hanyuma ikagira reaction ya etherification hamwe na agent ya etherifying. Ikindi nuko ibikoresho bya selile bigizwe mumazi ya sodium hydroxide yumuti na urea. Alkali irenze muri selile ya alkali igomba kuvaho mbere yo kwitwara. Muri iyi nyandiko, selile zitandukanye za alkali zizwe na infragre spekitroscopi na X-ray itandukanya. Hanyuma, uburyo bwa kabiri bwakoreshejwe ukurikije imiterere yibicuruzwa bya etherification.
Kugirango hamenyekane intambwe yo gutegura etherification, hakozwe uburyo bwa reaction ya antioxydeant, alkali na glacial acetic acide mugihe cyo kurya. Ibintu bigira ingaruka kumyiteguro ya hydroxyethyl selulose byagenwe nubushakashatsi bumwe. Ukurikije ubwiza bwibicuruzwa mubisubizo byamazi 2%. Ibisubizo byubushakashatsi byerekana ko ingano ya diluent, ingano ya okiside ya Ethylene, igihe cya alkalisation, ubushyuhe nigihe cya rehidrasi ya mbere na kabiri bigira uruhare runini mubikorwa byibicuruzwa. Uburyo bwibintu birindwi ninzego eshatu byemejwe kugirango hamenyekane uburyo bwiza bwo gutegura.
Dusesenguye imiterere yabateguwehydroxyethyl selile, harimo ubukonje, ivu, kohereza urumuri, ubuhehere, nibindi. uburyo bwikizamini bwakoresheje ibipimo bya ASTM.
Igihe cyo kohereza: Apr-25-2024