I-Hydroxyethyl cellulose (HEC) i-non-ionic, i-polymer enyibilikayo emanzini ephuma kwi-cellulose. Isetyenziswa ngokubanzi kwizicelo ezahlukeneyo zoshishino ngenxa yeempawu zayo ezikhethekileyo, ngokukodwa ekuqulunqweni kwe-adhesives. Ukuzinza kwe-adhesives kunye nokukwazi kwabo ukugcina amanzi kubaluleke kakhulu ekusebenzeni kwabo, kwaye i-HEC idlala indima ebalulekileyo ekuphuculeni le miba.
Ulwakhiwo lweMichiza kunye neePropati zeHydroxyethyl Cellulose
I-HEC iveliswa ngokusabela kwe-cellulose nge-ethylene oxide, okubangela ukuba i-cellulose ether kunye namaqela e-hydroxyethyl. Oku kuguqulwa kwandisa ukunyibilika kwe-cellulose emanzini kwaye kwandisa i-viscosity yayo. I-degree of substitution (DS) kunye ne-molar substitution (MS) yamaqela e-hydroxyethyl kwi-cellulose backbone imisela iimpawu ze-HEC. Ngokuqhelekileyo, i-DS ephezulu kunye ne-MS iphumela ekunyusweni kokunyibilika kwamanzi kunye ne-viscosity, okwenza i-HEC ibe yinto esebenzayo yokuqina kunye nokuzinzisa.
Iindlela zokuZimba kokuncamathelisa
Ukuzinza kwe-Adhesive kubhekiselele kwisakhono sokwakheka kwe-adhesive ukugcina ukuhambelana kwayo, i-homogeneity, kunye neempawu zokusebenza ngexesha. Izinto ezininzi zinegalelo ekuzinzeni kwe-adhesive, kubandakanywa iimpawu ze-rheological, ukuchasana nokuhlukana kwesigaba, kunye nokuhambelana namanye amacandelo.
Iimpawu zeRheological
Iimpawu zerheological zokuncamathelisa, ezifana ne-viscosity kunye nokuziphatha kokucheba, zibalulekile kwisicelo kunye nokusebenza kwazo. I-HEC iphucula ezi zakhiwo ngokwenza isakhiwo sothungelwano ngaphakathi kwe-matrix yokunamathela. Iintambo ze-polymer ze-HEC zisebenzisana kunye kunye namacandelo okubambelela, ukudala isisombululo se-viscous esichasayo ukuhamba phantsi kweemeko eziphantsi zokucheba kodwa ziba zincinci ngaphantsi kwe-shear ephezulu. Oku kuziphatha kwe-shear-thinning kunenzuzo ngexesha lokusetyenziswa kwe-adhesives, njengoko ivumela ukuba kube lula ukusasazeka kunye nokukhwabanisa ngelixa ugcina uzinzo xa ufakwe.
Ukuchasana nokwahlulwa kweSigaba
Ukuhlukana kwesigaba kwi-adhesives kunokwenzeka ngenxa yokungahambelani kwamacandelo ahlukeneyo okanye ngenxa yokutshintsha kweemeko zokusingqongileyo ezifana neqondo lokushisa kunye nomswakama. I-HEC inceda ukukhusela ukuhlukana kwesigaba ngokusebenza njenge-colloidal stabilizer. Ubume bayo be-hydrophilic buvumela ukuba idibane namanzi kunye namanye amacandelo e-polar, yenze umxube we-homogenous. Ukongezelela, ubunzima beemolekyuli eziphezulu ze-HEC zibonelela ngokuzinza kwe-steric, ukunciphisa amathuba okuhlukana kwesigaba ngexesha.
Ukuhambelana namanye aMalunga
I-HEC iyahambelana noluhlu olubanzi lwamacandelo okunamathela, kubandakanywa i-resins, iifayili, kunye nezinye izongezo. Oku kuhambelana kuqinisekisa ukuba i-HEC inokufakwa ngokulula kwiifom ezahlukeneyo zokubambelela ngaphandle kokuchaphazela kakubi ukusebenza kwazo. Ngaphezu koko, i-HEC inokuphucula ukusasazeka kweefayili kunye nezinye iincinci eziqinileyo ngaphakathi kwe-adhesive, igalelo kwimveliso efanayo kunye nezinzile.
Iipropati zokuGcina amanzi
Ukugcinwa kwamanzi kuyipropathi ebaluleke kakhulu kwizicelo ezininzi zokuncamathelisa, ngakumbi ezo zibandakanya i-substrates ene-porous okanye amaxesha avulekileyo amade. I-HEC iphakamisa kakhulu amandla okugcina amanzi okunamathela ngeendlela ezininzi.
I-Hydrophilicity kunye nokuBophelela kwaManzi
I-HEC ine-hydrophilic ephezulu, oku kuthetha ukuba inobudlelwane obuqinileyo bamanzi. Le propati ivumela i-HEC ukuba ifunxe kwaye igcine amanani abalulekileyo amanzi ngaphakathi kwe-matrix yokunamathela. Amaqela e-hydroxyethyl kumqolo we-cellulose enza iibhondi ze-hydrogen kunye neemolekyuli zamanzi, zibambe ngokufanelekileyo kwaye zinciphise izinga lokunyuka kwamanzi. Oku kubaluleke kakhulu kwizicelo apho ukugcina umgangatho othile wokufuma kubalulekile ekusebenzeni kwe-adhesive.
Ukwenziwa kwefilimu kunye nesithintelo sokufuma
Ukongeza kumanzi okubopha, i-HEC inegalelo ekubunjweni kwefilimu eqhubekayo kwindawo yokubambelela. Le filimu isebenza njengesithintelo ekulahlekeni kokufuma, ngakumbi ukuqinisa ukugcinwa kwamanzi. Ikhono lokwenza ifilimu ye-HEC inenzuzo kwizicelo apho kufuneka ixesha elide elivulekileyo, njengakwi-adhesives wallpaper kunye ne-tile adhesives. Ngokunciphisa i-evaporation yamanzi, i-HEC iqinisekisa ukuba i-adhesive ihlala isebenza ixesha elide, ivumela uhlengahlengiso kunye nokubekwa ngokutsha kwezinto ezidibeneyo.
Impembelelo kwixesha lokumisa kunye namandla okunamathela
Iipropati zokugcina amanzi ze-HEC nazo zichaphazela ixesha lokumisa kunye namandla okugqibela okunamathela. Ngokugcina amanzi ngaphakathi kwe-matrix yokubambelela, i-HEC ilawula izinga lokulahleka kwamanzi, okukhokelela kwinkqubo yokulawula eyomileyo kunye neyomileyo. Oku kumisa okulawulwayo kubalulekile ekufezekiseni amandla okunamathela afanelekileyo, njengoko kuvumela ukubunjwa kwefilimu efanelekileyo kunye nokudibanisa kunye ne-substrate. Ukomisa okukhawulezayo kunokubangela iibhondi ezibuthathaka kunye nokubambelela kakubi, ngelixa inkqubo yokomisa elawulwayo eququzelelwa yi-HEC iqinisekisa ukuba i-adhesive joints eqinile kwaye ehlala ixesha elide.
Ukusetyenziswa kwe-HEC kwii-Adhesives
I-HEC isetyenziswa kuluhlu olubanzi lwezicelo zokuncamathelisa, kubandakanya:
I-Adhesives yoKwakha: I-HEC isetyenziswa ngokuqhelekileyo kwi-adhesives yokwakha yokugcina amanzi kunye neempawu zokuqina, ukuqinisekisa ukuba izibophelelo ezizinzileyo kunye nezizinzileyo kwizinto zokwakha.
I-Adhesives yephepha lodonga: Ukukwazi kwe-HEC ukugcina amanzi kunye nokubonelela ixesha elide elivulekileyo lenza ukuba lilungele ukunamathiswa kwephepha lodonga, okuvumela ukusetyenziswa lula kunye nohlengahlengiso.
I-Tile Adhesives: Kwi-tile yokunamathela, i-HEC iphucula ukusebenza kunye nokubambelela ngokugcina umxholo womswakama ofunekayo ukubeka ngokufanelekileyo kunye nokudibanisa.
I-Packaging Adhesives: I-HEC iphucula ukusebenza kwe-adhesives yokupakisha ngokunyusa ukuzinza kwabo kunye nokuchasana nokuhlukana kwesigaba, ukuqinisekisa umgangatho ohambelanayo kunye nokusebenza.
Iselulosi yeHydroxyethyl idlala indima ebalulekileyo ekwandiseni uzinzo nokugcinwa kwamanzi kwiimpawu zokuncamathelisa. Ubume bayo obukhethekileyo beekhemikhali kunye neempawu zifaka isandla ekuphuculweni kweempawu ze-rheological, ukuchasana nokuhlukana kwesigaba, kunye nokuhambelana nezinto ezahlukeneyo zokubambelela. Ukongeza, i-hydrophilicity kunye nefilimu yokwenza ifilimu ye-HEC ikhulisa kakhulu ukugcinwa kwamanzi, okukhokelela kulawulo olungcono kumaxesha omisa kunye namandla okuncamathela. Ukuguquguquka kunye nokusebenza kakuhle kwe-HEC kwenza ukuba ibe yinto ebaluleke kakhulu ekuqulunqweni koluhlu olubanzi lwe-adhesives, ukuqinisekisa ukusebenza kwabo kunye nokuthembeka kwizicelo ezahlukeneyo.
Ixesha lokuposa: Jun-02-2024