Hydroxyethyl cellulose (HEC) Ether ce mai narkewa mara ruwa wacce ba ta ionic cellulose. An yi amfani da shi sosai a cikin suturar ruwa saboda kyawawan kauri, emulsifying, ƙirƙirar fim da kaddarorin dakatarwa. A matsayin thickener da stabilizer a coatings, HEC iya muhimmanci inganta rheological Properties da paintability na coatings.
1. Babban ayyuka na hydroxyethyl cellulose
A cikin rufi na tushen ruwa, manyan ayyuka na HEC suna nunawa a cikin waɗannan abubuwan:
Tasiri mai kauri: HEC yana da ƙarfin yin kauri mai ƙarfi, wanda zai iya inganta haɓakar danko da dakatarwar ikon rufin ruwa da hana pigments da filler a cikin rufi daga daidaitawa.
Inganta rheology: HEC na iya daidaita yawan ruwa a cikin kayan kwalliyar ruwa don ya nuna ƙarancin ɗanɗano a ƙarƙashin babban juzu'i, yana sauƙaƙa yadawa lokacin zanen, yayin da yake nuna mafi girman danko a ƙarƙashin yanayi na tsaye, don haka rage kwararar fenti. rataye sabon abu.
Ingantacciyar kwanciyar hankali: HEC yana da juriya mai daskarewa-narkewa da kwanciyar hankali na ajiya, wanda zai iya tsawaita rayuwar sutura da tabbatar da kwanciyar hankali a cikin yanayi daban-daban.
Inganta abubuwan ƙirƙirar fim: HEC ta samar da fim mai sassauƙa bayan fenti ya bushe, haɓaka mannewa da juriya na fim ɗin fenti da haɓaka aikin kariya na fenti.
2. Yadda ake amfani da HEC
Lokacin amfani da HEC a cikin rufi na tushen ruwa, ana amfani da hanyoyin tarwatsawa da rushewa da hanyoyin haɓaka kai tsaye. Wadannan su ne takamaiman matakai da dabarun amfani:
() 1. Pretreatment don narkar da HEC
HEC foda ne wanda ke da wuya a narke kai tsaye kuma a sauƙaƙe yana samar da clumps a cikin ruwa. Saboda haka, kafin ƙara HEC, ana bada shawara don tarwatsa shi. Matakan da aka saba sune kamar haka:
Dama kuma tarwatsa: A hankali ƙara HEC zuwa ruwa a ƙarƙashin ƙananan saurin motsawa don guje wa samuwar kumbura. Ya kamata a daidaita adadin HEC da aka ƙara bisa ga buƙatun danko na sutura, gabaɗaya lissafin 0.3% -1% na jimlar dabara.
Hana caking: Lokacin da aka ƙara HEC, ana iya ƙara ƙaramin adadin abubuwan anti-caking, irin su ethanol, propylene glycol, da dai sauransu, a cikin ruwa don ba da damar HEC foda don tarwatsawa daidai kuma rage yiwuwar yin caking.
(2). Hanyar watsawa da rushewa
Hanyar tarwatsawa da rushewa shine narkar da HEC daban a cikin ruwa mai danko yayin shirye-shiryen fenti, sa'an nan kuma ƙara shi zuwa fenti. Takamaiman matakan sune kamar haka:
Tsarin rushewa: HEC yana da wuya a narke a al'ada ko ƙananan zafin jiki, don haka za'a iya yin zafi da ruwa daidai don isa zafin jiki na 30-40 ° C don hanzarta rushewar HEC.
Lokacin motsawa: HEC yana narkewa a hankali kuma yawanci yana buƙatar motsawa don 0.5-2 hours har sai an narkar da shi gaba ɗaya a cikin ruwa mai haske ko translucent.
Daidaita ƙimar pH: Bayan HEC ta narkar da, ana iya daidaita ƙimar pH na bayani bisa ga buƙatun, yawanci tsakanin 7-9, don inganta kwanciyar hankali na sutura.
(3). Hanyar ƙara kai tsaye
Hanyar haɓaka kai tsaye ita ce ƙara HEC kai tsaye a cikin tsarin sutura yayin aikin samar da sutura, wanda ya dace da sutura tare da buƙatun tsari na musamman. Da fatan za a kula da abubuwa masu zuwa lokacin aiki:
Farko bushe sannan a jika: ƘaraHECzuwa busasshiyar fenti na ruwa da farko, a haɗa shi daidai da sauran foda, sa'an nan kuma ƙara ruwa da abubuwan ruwa don guje wa tashin hankali.
Ikon Shear: Lokacin da ƙara HEC zuwa shafi, ya zama dole don amfani da kayan haɗin haɗawa da karfi, kamar yadda ake watsa HEC-sauri, saboda haka Hec za a iya watsa shi a ko'ina cikin ɗan gajeren lokaci kuma ku isa ga danko da ake buƙata.
3. Sarrafa adadin HEC
A cikin suturar ruwa na ruwa, adadin HEC ya kamata a sarrafa shi bisa ga ainihin bukatun da ake bukata. Da yawa HEC zai haifar da danko mai rufi ya zama mai girma kuma yana rinjayar aikin aiki; kadan HEC ba zai iya cimma tasirin da ake tsammani ba. A karkashin yanayi na al'ada, ana sarrafa sashi na HEC a 0.3% -1% na jimlar dabara, kuma za'a iya daidaita ƙayyadaddun ƙayyadaddun ta hanyar gwaje-gwaje.
4. Tsare-tsare ga HEC a cikin suturar ruwa
Ka guje wa tashin hankali: HEC yana kula da haɓakawa a cikin ruwa, don haka lokacin daɗa shi, ƙara shi a hankali kamar yadda zai yiwu, tarwatsa shi daidai, kuma kauce wa haɗuwa da iska kamar yadda zai yiwu.
Yanayin zafi: HEC yana narkewa da sauri a yanayin zafi mafi girma, amma zafin jiki bai kamata ya wuce 50 ° C ba, in ba haka ba zai iya shafar danko.
Yanayin motsawa: Ana buƙatar ci gaba da motsawa yayin aikin rushewar HEC, kuma ya kamata a yi amfani da kwantena tare da murfi kamar yadda zai yiwu don hana gurbatawa daga ƙazantattun waje da ƙazantar ruwa.
Daidaita darajar pH: Danko na HEC zai karu a ƙarƙashin yanayin alkaline, don haka ƙimar pH na maganin yana buƙatar daidaitawa da kyau don hana aikin da ake yi na rufi daga raguwa saboda pH mai yawa.
Gwajin dacewa: Lokacin haɓaka sabbin dabaru, yakamata a gwada amfani da HEC don dacewa da sauran masu kauri, emulsifiers, da sauransu don tabbatar da cewa babu wani mummunan halayen da zai faru.
5. Misalan aikace-aikacen HEC a cikin suturar ruwa
Ana iya amfani da HEC azaman mai kauri a cikin duka bangon bangon ciki na tushen ruwa da kayan bangon bango na waje. Misali:
Fentin bangon bangon ruwa na tushen ruwa: Ana amfani da HEC don inganta haɓakar kayan fenti, yin aikace-aikacen ya zama mai santsi da ƙari, da rage alamun goga.
Rufin bango na waje na tushen ruwa: HEC na iya haɓaka juriya na sag da juriya na yanayin rufin kuma guje wa lalacewar fim ɗin da ke haifar da yashwar ruwan sama.
Aikace-aikacen HEC a cikin ruwa na ruwa ba zai iya inganta aikin ginin ginin ba kawai, amma kuma inganta ingantaccen inganci da karko na fim ɗin. A cikin aikace-aikacen aikace-aikacen, bisa ga ƙayyadaddun buƙatun sutura, hanyar rushewa da ƙarin adadin HEC an zaɓa da kyau, kuma a hade tare da shirye-shiryen sauran albarkatun kasa, za a iya samun sakamako mai inganci.
Lokacin aikawa: Nuwamba-10-2024