I-SelerUlose Ether yi-polymer ye-Syntmer eyenziwe kwi-selupese yendalo ngokuguqula iikhemikhali. I-SelerUlose Ether yindawo yokukhutshwa kwendalo. Ukuveliswa kwe-ether yeselselose yahlukile kwi-polymers yokwenziwa. Eyona nto iphambili kuyo esisiseko yi-sellulose, i-polymer yendalo. Ngenxa yobunye besakhiwo sendalo seselfowuni, i-selsulose ngokwayo ayinakwazi ukusabela ngeearhente zokhenketho. Nangona kunjalo, emva konyango iarhente yokudumba, iimbophelelo ze-hydrogen eqinileyo phakathi kweemolekyuli kunye namakhonkco atshatyalaliswayo, kwaye ukukhutshwa kweqela le-hydroxyl iba yi-alkali. Fumana i-sell sether.
Iipropathi ze-Selesese Hailes zixhomekeke kuhlobo, inani kunye nokusasazwa kwezinto ezizimeleyo. Ukwahlula-hlula kwe-Selese eSelesese eTonis kukwasekelwa kuhlobo lokuthathela ingqalelo izinto, isidanga sokuthengiswa, ukonakala kunye neepropathi ezinxulumene noko. Ngokutsho kohlobo lokuthathela izinto kwi-molecular thein, inokwahlulwa ibe yi-monotere kunye ne-ether exubeneyo. I-MC ihlala isebenzisa i-monoether, kwaye i-HPMC ixutywe nether. I-methyl seluplose ether MC yimveliso emva kweQela le-hydroxyl kwicandelo le-Glucose ye-Gluolose ye-Floulose ifakwe ngendlela eyiyo. Yimveliso efunyenwe ngokufaka indawo yeqela le-hydroxyl kwiyunithi eneqela le-AFCHYy kunye nelinye icandelo ngeqela le-hydroxlypropy. Ifomula yesakhiwo i [c6h7o2 (oh) i-3-Mn (OCH2CH2) M [OCH2CH (O) i-Hydroxyl Sethy, ezi zezona zinto ziphambili zentengiso zisetyenziswa kakhulu kwaye zithengiswa emarikeni.
Ngokuphathelelene nokuluka, kunokwahlulwa kwi-Ionic kwaye ingenzi-i-ionic. I-ionic forwecle inyibiliki ye-ionic selsulose edityaniswe ikakhulu yochungechunge amabini eAlkyl I-Ionic CMC isetyenziswa ikakhulu kwizinto zokucoca ngokukuko, ukuprinta okubhaliweyo kunye nokudaya, ukutya kunye nokuhlolwa kweoyile. I-Ionic MC, i-HPMC, iHMC, njl njl. Zisetyenziswa ikakhulu kwizinto zokwakha, i-Latex Coatings, iarhente yokugcina amanzi, i-stailing, iarhente yefilimu yefilimu.
Ukugcinwa kwamanzi kwe-seluplose ether
Kwimveliso yezinto zokwakha, ngakumbi udaka oluxubeneyo oluxubeneyo, i-Ether Ether idlala indima engenakufikelelwa, ngakumbi kwimveliso yodaka olukhethekileyo (udaka oluhleweyo), yinto ebalulekileyo nebaluleke kakhulu.
Indima ebalulekileyo yokunyibilika kwamanzi e-tellase kwi-diser ebukhali ineempawu ezintathu, enye inesikhundla esihle sokugcina amanzi, enye yimpembelelo ekungqineni nasekuthiningqelo lodaka, kwaye owesithathu kukunxibelelana nesamente.
Inkqubo yokugcina amanzi ye-selsulose ether ixhomekeke ekufungeni lwamanzi kuludaka, ukwakhiwa kodaka, ubungqingqwa bodaka, kunye nexesha lokumiswa kwemibandela. Ukugcinwa kwamanzi kwe-seluplose i-ether ngokwayo kuza ukusuka kwi-solidality kunye nokupheliswa kwenkunkuma kweselfowuni uqobo. Njengoko sonke sazi, nangona i-selsulose chain iqulathe inani elikhulu lamaqela amakhulu e-hydratty, ayinyibili emanzini, kuba isakhiwo seselselose sinesidanga esiphezulu. Ubuchule bokuhluthwa kwamaqela e-hydroxyl bodwa akwanelanga ukugubungela iibhondi ezinamandla ze-hydrogen kunye ne-van der imbonakalo phakathi kweemolekyuli. Ke ngoko, ifudula kodwa ayinyibiliki emanzini. Xa umntu obambelelayo waziswa kwi-molecular thein, ayisiyiyo kuphela into ephambili intshabalalo i-hydrogen shain, kodwa kunye ne-hydrogen ye-hydrogen ye-hydrogen itshatyalalisiwe ngenxa yomntwa ophantsi. Ukukhululeka, kokukhona mkhulu phakathi kweemolekyuli. Kokukhona mkhulu umgama. Impembelelo enkulu yokutshabalalisa i-Hydrogen Bonds, i-Ete yaseLtulose iba ngathi inyibilikisi emva kokuba i-latkulose lattle yandisiwe kwaye isisombululo singenasisombululo esiphezulu. Xa iqondo lobushushu liyaphuma, i-hydration ye-polymer yamanzi, kwaye amanzi aphakathi kwamakhonkco aqhutywa. Xa iziphumo zokupheka zanele, iimolekyuli ziqala ukudibanisa, zenza i-geriment yenethiwekhi yenethiwekhi ye-gene. Izinto ezichaphazela ukugcinwa kwamanzi kubandakanya i-viscosity ye-seluplose ether, isixa esongeziweyo, ukulunga kwamasuntswana kunye neqondo lokushisa.
Ukuphelisa i-viscosity ye-vissese i-ether, ilunge ngakumbi intsebenzo yokugcina amanzi, kunye nokupheliswa kwesisombululo sePolymer. Kuxhomekeka kubunzima bemolekyuli (isidanga sokugcwalisa i-polymerization) ye-polymer, ikwagqitywa kubunzima bemozulu yemolekyuli kunye nobume bekhonkco, kunye nokuhanjiswa kweentlobo kunye nenani leentlobo ezichaphazela ngqo uluhlu lwayo lokundwendwela. [η] = kmcc
[η] Uhlobo lwe-varinsic yesisombululo sePolymer
m ubunzima be-polymer moley
I-polymer ye-Polymer ihlala ihleli
I-Kycosity isisombululo sokusebenza
I-viscosity yesisombululo sePolymer ixhomekeke kubunzima bemolekyuli yePolymer. I-viscosity kunye nokugxininiswa kwesisombululo se-Selese i-selsulose sihambelana nesicelo kwimimandla eyahlukeneyo. Ke ngoko, i-Selese nganye iseti ineenkcazo ezininzi ezahlukeneyo zokufakelwa, kwaye uhlengahlengiso lwe-viscofity luye lwaqaliswa ikakhulu kukonakaliswa kweAlkali Selelise, oko kukuthi, ukwaphula imixokelelwane ye-folecial molecrins.
Ngaphezulu inani le-itelulose i-ether yongezwa kodaka, ngakumbi ukusebenza kokugcina amanzi, kunye nokuphezulu komsebenzi wokugcina amanzi.
Ngobukhulu becala, ugqibelele isuntswana, kungcono ukugcinwa kwamanzi. Jonga umzobo 3 Ngaphantsi kosasazo olufanayo luthile, lwenza isisombululo esinamafu okanye i-agglomerates. Ichaphazela kakhulu ukugcinwa kwamanzi kwe-seluplose i-ether, kwaye ukuluka kwenye yezinto zokukhetha i-gather ekrway.
Ukutyibilika kunye neThuqiptropy ye-seluplose ether
Umsebenzi wesibini we-Ilser-Floing, kuxhomekeke: inqanaba le-polymerization ye-seluplose ether, isisombululo, inqanaba le-Shear, iqondo lobushushu kunye nezinye iimeko. Ipropathi yegengi yesisombululo yahlukile kwi-alkyl sellulose kunye nokuguqulwa kwayo. Ipropathi yokurhafiswa ihambelana nenqanaba lokufaka endaweni, isisombululo kunye nokongezwa. I-HydroXlekyl Derivatives, iipropathi zejeli zikwahambelana nenqanaba lokuguqula kwe-hydroxayl. Kwi-viscofity ephantsi ye-MC kunye ne-HPMC, i-HPMC, i-10% ye-10% ye-MC kunye ne-HPMMC inokulungiselela i-5% ye-SCCMC inokulungiselela kuphela ukuhlelwa kwesisombululo se-Telulose ye-Ether inomgangatho we-1% -2%. Ubunzima obuphezulu be-follelose i-ether inomgangatho ophezulu kakhulu. Kwisisombululo esifanayo sokuxinana, ii-polymers ezinamatye ahlukeneyo eemolekyuli zineendawo zokundwendwela ezahlukeneyo. Inqanaba eliphezulu. UVenkile ekujoliswe kuyo unokufezekiswa kuphela ngokongeza isixa esikhulu se-moleculase esineselula. I-viscosity yayo ayinamsebenzi mncinci kumgangatho we-Shear, kwaye i-viscofity ephezulu ifikelela kwithagethi yethagethi, kwaye isixa esongeneyo esifunekayo sincinci, kwaye i-vickosity ixhomekeke ekusebenzeni ngokuqinileyo. Ke ngoko, ukufezekisa ukungqinelana okuthile, isixa esithile se-ether sether (uxinzelelo lwesisombululo) kunye ne-vissosity yesisombululo kufuneka iqinisekiswe. Iqondo lobushushu le-gene lesisombululo likwancipha ngocoselelo ngokunyuka kwengxaki yesisombululo, kunye ne-gels kubushushu begumbi emva kokufikelela uxinzelelo oluthile. Ukugxininiswa kwe-HPMC iphakame kakhulu kubushushu begumbi.
Ukungqinelana kunokulungiswa ngokukhetha ubungakanani be-paulticle kwaye ukhethe iiselwase Ukulungiswa okubizwa ngokuba kukwazisa inqanaba elithile lokufakwa endaweni yamaqela e-hydroxaskyl kwisakhiwo seSkeleton ye-MC. Ngokutshintsha amaxabiso okufana nabantu ababini, oko kukuthi, i-DS kunye ne-DS kunye neMimandla yeMigangatho ye-Manages Iimfuneko ezahlukeneyo zomsebenzi we-Teluplose Ethely inokufunyanwa ngokutshintsha amaxabiso okuqala atshintshiwe kwezinto ezimbini.
I-Seleculose ebhashe esetyenziswayo kwizinto zokwakha ezakhiweyo kufuneka inyibilikise ngokukhawuleza emanzini abandayo kwaye ibonelele ngokungqinelana kwenkqubo. Ukuba unikwe inqanaba elithile le-Shear, luba luba yi-putcupler kunye nebhloko ye-colloidal, eyimveliso ephantsi okanye imveliso esemgangathweni.
Kukho ubudlelwane obulungileyo obulungileyo phakathi kokungqinelana kwesamente i-starchi kunye nethamo ye-seluplose ether. I-Telulose Ether inokunyusa kakhulu i-viscosity yodaka. Idosi enkulu, eyona nto icacileyo.
Isisombululo se-vissosity se-ethe molous ye-etheeus atheeus i-ThixitRopy ephezulu, ekwangumlinganiswa omkhulu we-ether yeseluplose. Izisombululo ze-ACTEACE ze-MC Polymers zihlala zine-pseudoplastic kunye ne-non-th-th-th-th-thyropic fluity ngaphantsi kweqondo lokushisa layo, kodwa iNewtonian Sperties ngamaxabiso asezantsi asezantsi. I-pseudoplasticimostity inyuka ngobunzima bemolekyuli okanye uxinzelelo lwe-ether sether, ngaphandle kohlobo lokuthatha indawo kunye nenqanaba lokufaka endaweni. Ke ngoko, i-selupelose esuka kwiBanga le-viscosity efanayo, i-MC, i-HPMC, i-HMC, iya kuhlala ibonisa iipropathi ezifanayo ze-rheocical logama nje ukuba uxinzelelo kunye nobushushu zigcinwe rhoqo. I-Gels zesakhiwo isenziwa xa iqondo liphakanyisiwe, kwaye ihamba kakhulu i-Thixitropic. Uxinzelelo oluphezulu kunye ne-viscofity ephantsi yeselula i-Show Thrixotdropy naphantsi kweqondo lobushushu. Le ndawo yepropathi ixhamla kuhlengahlengiso lwenqanaba kunye nokungena ekwakhiweni kokwakha umdaka. Kufuneka ichongwe apha ukuba i-viscosity yeselsese i-ether, ilunge ngakumbi ekugcinweni kwamanzi, kodwa iphakamile i-vissosity ye-felulose ye-ether, kunye nefuthe elilinganayo kuxinzelelo lwe-Colmar. Ukuphakama kwe-viscofity, eyona nto icacileyo yokutyibilika kodaka, kodwa ayingqinelani ngokupheleleyo. Uhlobo oluthile oluPhakathi noluPhakamileyo, kodwa i-imeyile eguqulweyo ye-ersulose inentsebenzo engcono ekuphuculeni amandla olwakhiwo lodaka lwamanzi. Ngokunyuka kwe-viscofity, ukugcinwa kwamanzi kwe-ether setephule
IXESHA LOKUQALA: FEB-21 ukuya ku-525