Imisebenzi ye-cellulose ether odakeni yilena: ukugcinwa kwamanzi, ukuhlangana okwandayo, ukujiya, okuthinta isikhathi sokumisa, kanye nezakhiwo zokungenisa umoya.Ngenxa yalezi zici, inesikhala esibanzi sokufaka isicelo kudaka lezinto zokwakha.
1. Ukugcinwa kwamanzi kwe-cellulose ether kuyisici esibaluleke kakhulu ekusetshenzisweni kodaka.
Izici eziyinhloko ezithinta ukugcinwa kwamanzi kwe-cellulose ether: i-viscosity, usayizi wezinhlayiyana, umthamo, isithako esisebenzayo, izinga lokuqedwa, indlela yokugcinwa kwamanzi: ukugcinwa kwamanzi kwe-cellulose ether ngokwayo kuvela ekuncibilikeni nasekuphelelweni kwamanzi kwe-cellulose ether ngokwayo.Nakuba iketango lamangqamuzana e-cellulose liqukethe inani elikhulu lamaqembu e-hydroxyl anezakhiwo eziqinile ze-hydration, ayincibiliki emanzini.Lokhu kungenxa yokuthi isakhiwo se-cellulose sinezinga eliphezulu le-crystallinity, futhi ikhono le-hydration lamaqembu e-hydroxyl yedwa akwanele ukubhubhisa izibopho eziqinile ze-intermolecular.I-Hydrogen bond kanye ne-van der Waals inamandla, ngakho-ke ikhukhumeza kuphela kodwa ayincibiliki emanzini.Lapho enye indawo yethulwa ochungechungeni lwamangqamuzana, akugcini nje kuphela ukuthi obambele agqashule ibhondi ye-hydrogen, kodwa futhi ibhondi ye-hydrogen ye-interchain iyaphuka ngenxa yokubophana kwengxenye phakathi kwamaketanga aseduze.Uma i-substitute inkulu, ibanga elikhulu phakathi kwama-molecule liba likhulu, elibhubhisa umphumela we-hydrogen bond.Uma i-cellulose lattice ikhudlwana, isisombululo singena ngemva kokukhula kwe-cellulose lattice, futhi i-ether cellulose iba inyibiliki emanzini, yakha isixazululo se-viscosity ephezulu.Lapho izinga lokushisa likhuphuka, i-hydration ye-polymer iba buthaka, futhi amanzi phakathi kwamaketanga axoshwa.Lapho ukuphelelwa amanzi emzimbeni kwanele, ama-molecule aqala ukuhlanganisa, enze isakhiwo senethiwekhi esinezinhlangothi ezintathu kanye nemvula ye-gel.
(1) Umthelela wosayizi wezinhlayiyana nesikhathi sokuxuba se-cellulose ether ekugcineni amanzi
Ngenani elifanayo le-cellulose ether, ukugcinwa kwamanzi kwe-mortar kuyanda ngokukhula kwe-viscosity;ukwanda kwenani le-cellulose ether kanye nokwanda kwe-viscosity kwandisa ukugcinwa kwamanzi odaka.Uma okuqukethwe kwe-cellulose ether kudlula u-0.3%, ukuguqulwa kokugcinwa kwamanzi odaka kuvame ukulingana.Amandla okugcina amanzi odaka alawulwa kakhulu isikhathi sokuchithwa, futhi i-finener cellulose ether incibilika ngokushesha, futhi umthamo wokugcina amanzi ukhula ngokushesha.
(2) Umthelela wezinga le-etherification ye-cellulose ether kanye nezinga lokushisa ekugcinweni kwamanzi
Njengoba izinga lokushisa likhuphuka, ukugcinwa kwamanzi kuncipha, futhi izinga eliphezulu le-etherification ye-cellulose ether, kuba ngcono ukugcinwa kwamanzi okushisa kwe-cellulose ether.Ngesikhathi sokusetshenziswa, izinga lokushisa lodaka olusanda kuxutshwa ngokuvamile lingaphansi kuka-35 ° C, futhi ngaphansi kwezimo zezulu ezikhethekile, izinga lokushisa lingafinyelela noma lidlule ku-40 ° C.Kulokhu, ifomula kufanele ilungiswe futhi umkhiqizo onezinga eliphezulu le-etherification kufanele ukhethwe.Okungukuthi, cabanga ukukhetha i-cellulose ether efanelekile.
2. Umthelela we-cellulose ether kokuqukethwe komoya kodaka
Emikhiqizweni yodaka oluxutshwe okomile, ngenxa yokwengezwa kwe-cellulose ether, inani elithile lamabhamuza omoya amancane, ahlukaniswe ngokufanayo futhi azinzile angeniswa odakeni olusanda kuxutshwa.Ngenxa yomphumela webhola wamabhamuza omoya, udaka lukwazi ukusebenza kahle futhi lunciphisa ukunyakaziswa kodaka.Ukuqhekeka nokushwabana, futhi kukhuphule izinga lokukhipha udaka.
3. Umphumela we-cellulose ether ku-hydration kasimende
I-Cellulose ether ine-retardation ekufakweni kwe-hydration yodaka olusekelwe kusimende, futhi umphumela wokuvinjelwa uyathuthukiswa ngokwanda kokuqukethwe kwe-cellulose ether.Izici ezinomthelela we-cellulose ether ku-cement hydration yilezi: umthamo, izinga le-etherification, uhlobo lukasimende.
Isikhathi sokuthumela: Feb-02-2023