I-Cellulose ether, ngokukodwa i-hydroxypropyl methylcellulose (HPMC), sisongezo esibalulekileyo esisetyenziswa kumashishini ahlukeneyo ngokusebenza kwayo okuphezulu, ukugcinwa kwamanzi aphezulu, kunye nokukwazi ukwandisa i-viscosity. Kweli nqaku, siza kuphonononga kuhlalutyo olubanzi lokutyeba kunye neempawu zethixotropy ze-cellulose ether, ngakumbi sigxile kwi-HPMC.
Ukutyeba yipropathi esisiseko ye-cellulose ether, ebhekisa kwisakhono sento ukunyusa i-viscosity yesisombululo okanye ukusasazwa. I-HPMC ibonisa ukusebenza kakuhle kokuqina okuphezulu, oku kuthetha ukuba inokunyusa kakhulu i-viscosity nakwizinto eziphantsi kakhulu. Le propati inqweneleka kakhulu kwizicelo ezininzi, ezifana ne-adhesives, i-coatings, kunye nemveliso yokunyamekela komntu, apho i-viscosity ephezulu ifunekayo ekusebenzeni okungcono.
Enye yeenzuzo eziphambili ze-HPMC kukugcina amanzi aphezulu. Ugcino lwamanzi lubhekiselele kukwazi kwento ukugcina amanzi ngaphakathi kwisixokelelwano, naphantsi kobushushu obuphezulu okanye kubukho bezinye izinyibilikisi. I-HPMC yenza ulwakhiwo olufana nejeli xa lufakwe emanzini, olunceda ukugcina iimolekyuli zamanzi kwaye luthintele ukuphuphuma komphunga ngokugqithisileyo. Le propathi ibaluleke kakhulu kumashishini afana nokwakha kunye nodaka oluxubeneyo owomileyo, apho ukugcinwa kokufuma kubaluleke kakhulu kumanzi afanelekileyo kunye nokunyangwa kwemathiriyeli.
Ukwanda kwe-viscosity ebonelelwa yi-cellulose ether, efana ne-HPMC, ibonelela ngeenzuzo ezininzi kwizicelo ezahlukeneyo. Kwishishini lokwakha, i-HPMC isetyenziselwa ukwakhiwa kwesamente ukuphucula ukusebenza kunye nokuthintela ulwahlulo. I-viscosity ephezulu yesisombululo se-HPMC ivumela ukulawula okungcono ngexesha lokufaka isicelo, ukuqinisekisa ukusasazeka okufanayo kunye nokuphepha naluphi na ukulungiswa kweengqungquthela. Ngokufanayo, kumzi mveliso wepeyinti, i-HPMC yongezwa kwiingubo zokwandisa i-viscosity yazo, okukhokelela ekugqumeni okungcono kunye nokunciphisa ukuthontsiza.
Ngaphezu koko, indalo ye-thixotropic ye-cellulose ether yinto ebalulekileyo ekufuneka iqwalaselwe. Thixotropy ibhekisela kwipropati yempahla ukubonisa utshintsho olunokuguqulwa kwi-viscosity kwisicelo soxinzelelo lwe-shear. Ngamagama alula, xa i-shear force isetyenziswa, izinto eziphathekayo ziba ngaphantsi kwe-viscous, zivumela ukuba kube lula ukusetyenziswa, kwaye xa zimile, zibuyela kwisimo saso sokuqala se-viscosity. Le propathi iluncedo kakhulu kwizicelo ezinje ngee-caulks, ii-sealants, kunye ne-ointment yamayeza, apho kufuneka ukuhambisa ngokulula kunye nokusasaza. Ukuziphatha kwe-thixotropic ye-HPMC iqinisekisa usetyenziso olulula kunye nokumanzisa okuhle kwemiphezulu, ngelixa igcina i-viscosity eyimfuneko yokubambelela kunye nokutywinwa kweempawu.
Ukukhangela nzulu kwiipropathi ze-thickening kunye ne-thixotropy ye-cellulose ether, uphando olubanzi kunye nohlalutyo lwenziwa. Iindlela ezahlukeneyo, ezibandakanya imilinganiselo ye-rheological, zisetyenziselwa ukuvavanya i-viscosity, uxinzelelo lwe-shear, kunye nokuziphatha kwe-thixotropic yezisombululo ze-cellulose ether. Ezi zifundo zinceda ekuqondeni ubudlelwane phakathi koxinaniso, ubushushu, kunye nesantya sokucheba kwiipropathi ezityebileyo kunye ne-thixotropy ye-cellulose ether.
Ukuqukumbela, i-cellulose ether, ngokukodwa i-HPMC, ibonisa ukusebenza kakuhle kokuqina, ukugcinwa kwamanzi aphezulu, kunye nokunyuka kwe-viscosity kwizicelo ezahlukeneyo. Ikhono layo lokubonelela ngokuziphatha kwe-thixotropic kwenza ukuba ibe yongezelelo oluxabisekileyo lweemveliso apho isicelo esilula kunye ne-viscosity ephezulu ifunwa ngaxeshanye. Ukufumana ukuqonda okubanzi kweepropathi ezityebileyo kunye ne-thixotropy ye-cellulose ether, uhlalutyo olubanzi kunye nophando lwenziwa, oluphucula ngakumbi usetyenziso lwamashishini.
Ixesha lokuposa: Nov-24-2023