Ipeyinti yeLitye lokwenyani eneCellulose Etere

Impembelelo yesixa se-cellulose ether, ubunzima bemolekyuli kunye nendlela yokuguqulwa kwindlela yokufunxa amanzi kunye nokumhlophe kwepeyinti yamatye yokwenyani kuxoxwa ngayo, kunye ne-cellulose ether eneyona ndlela ibalaseleyo yokuchasana mhlophe yepeyinti yamatye yokwenyani iyahlolwa, kwaye ukusebenza okubanzi kwepeyinti yamatye yokwenene kuvavanywa ukubhaqwa.

Amagama angundoqo:ipeyinti yamatye yangempela; ukuxhathisa ukuqaqamba kwamanzi; i-cellulose ether

0,Intshayelelo

Ivarnish yelitye lokwenyani ludonga lokwenziwa kwe-resin emulsion yesanti eyenziwe ngegranite yendalo, ilitye eliqhekeziweyo kunye nomgubo welitye njenge-aggregate, i-synthetic resin emulsion njengesiseko semathiriyeli kunye nokongeza izongezo ezahlukeneyo. Inokwakheka kunye nefuthe lokuhlobisa ilitye lendalo. Kwiprojekthi yokuhlobisa yangaphandle yezakhiwo eziphakamileyo, ithandwa luninzi lwabanini kunye nabakhi. Nangona kunjalo, ngeentsuku zemvula, ukufunxa kwamanzi kunye nokumhlophe kuye kwaba yinto engafanelekanga enkulu yepeyinti yamatye yangempela. Nangona kukho isizathu esikhulu se-emulsion, ukongezwa kwenani elikhulu lezinto ze-hydrophilic ezifana ne-cellulose ether kwandisa kakhulu ukufunxa kwamanzi kwifilimu yepeyinti yamatye yokwenene. Kulo cwaningo, ukusuka kwizandla ze-cellulose ether, impembelelo yobuninzi be-cellulose ether, ubunzima be-molecular weight and modification type kwi-absorbing yamanzi kunye ne-whitening phenomenon yepeyinti yamatye yangempela yahlalutywa.

1. Indlela yokufunxa amanzi kunye nomhlophe wepeyinti yamatye yangempela

Emva kokuba ipeyinti yepeyinti yokwenyani yomisiwe, ithanda ukuba mhlophe xa idibana namanzi, ngakumbi kwinqanaba lokuqala lokumisa (12h). Kwimozulu yemvula, i-coat iya kuba yithambile kwaye imhlophe emva kokuhlanjwa yimvula ixesha elide. Isizathu sokuqala kukuba i-emulsion ithatha amanzi, kwaye okwesibini ibangelwa izinto ze-hydrophilic ezifana ne-cellulose ether. I-ether ye-cellulose inemisebenzi yokuqina kunye nokugcinwa kwamanzi. Ngenxa yokubambisa i-macromolecules, ukuhamba kwesisombululo kuyahluka kwi-Newtonian fluid, kodwa kubonisa ukuziphatha okutshintshayo kunye nokuguqulwa kwamandla okucheba, oko kukuthi, ine-thixotropy ephezulu. Ukuphucula ukusebenza kokwakhiwa kwepeyinti yamatye yangempela. I-Cellulose yenziwe nge-D-glucopyranosyl (anhydroglucose), kunye nefomula yayo elula ye-molecular (C6H10O5) n. I-ether ye-cellulose iveliswa yi-cellulose alcohol hydroxyl group kunye ne-alkyl halide okanye enye i-etherification agent phantsi kweemeko ze-alkaline. I-Hydroxyethyl cellulose ether structure, i-avareji yenani lamaqela e-hydroxyl afakwe endaweni ye-reagents ngeyunithi ye-anhydroglucose kwi-cellulose chain yemolekyuli ibizwa ngokuba yi-degree of substitution, i-2, 3, kunye ne-6 amaqela e-hydroxyl onke afakwe endaweni, kwaye iqondo eliphezulu lokutshintsha yi-3. Amaqela e-hydroxyl asimahla kwitsheyini yemolekyuli ye-cellulose ether inokunxibelelana ukwenza iibhondi ze-hydrogen, kwaye inokunxibelelana namanzi ukwenza iibhondi ze-hydrogen. Ukufunxwa kwamanzi kunye nokugcinwa kwamanzi kwe-cellulose ether kunempembelelo ngokuthe ngqo ekufunxeni kwamanzi kunye nokumhlophe kwepeyinti yamatye yangempela. Ukufunxwa kwamanzi kunye nokusebenza kokugcinwa kwamanzi kwe-cellulose ether kuxhomekeke kwiqondo lokutshintshwa kwe-cellulose, i-substituents kunye neqondo le-polymerization ye-cellulose ether ngokwayo.

2. Inxalenye yovavanyo

2.1 Izixhobo zovavanyo kunye nezixhobo

Umatshini we-JFS-550 wemisebenzi emininzi yokuvuselela ngokukhawuleza, ukusasazwa kwesantya esiphezulu kunye nokugaya isanti: I-Shanghai Saijie Chemical Equipment Co., Ltd.; Ibhalansi ye-JJ2000B ye-elektroniki: I-Changshu Shuangjie Testing Instrument Factory; Umatshini wokuvavanya we-elektroniki we-CMT-4200: I-Shenzhen Sansi Experimental Equipment Co., Ltd. inkampani.

2.2 Ifomula yovavanyo

2.3 Inkqubo yovavanyo

Yongeza amanzi, i-defoamer, i-bactericide, i-antifreeze, i-film-forming aid, i-cellulose, isilawuli se-pH kunye ne-emulsion kwi-disperser ngokwefomula yokusabalalisa ngokulinganayo, emva koko yongeza isanti enemibala kwaye uvuselele kakuhle, kwaye usebenzise isixa esifanelekileyo se-thickener Lungisa i-viscosity. , ukusabalalisa ngokulinganayo, kwaye ufumane ipeyinti yamatye yangempela.

Yenza ibhodi ngepeyinti yamatye yangempela, kwaye wenze uvavanyo lwamanzi olumhlophe emva kokunyanga iiyure ezili-12 (ukucwiliswa emanzini iiyure ezi-4).

2.4 Uvavanyo lomsebenzi

Ngokutsho kwe-JG / T 24-2000 "I-Synthetic Resin Emulsion Sand Wall Paint", uvavanyo lwentsebenzo luyenziwa, lugxininise ukuchasana kwamanzi okumhlophe kwe-hydroxyethyl cellulose ether iipeyinti zamatye okwenene, kunye nezinye izikhombisi zobugcisa kufuneka zihlangabezane neemfuno.

3. Iziphumo kunye nengxoxo

Ngokweempawu zokusebenza ze-hydroxyethyl cellulose ether, iimpembelelo zexabiso le-hydroxyethyl cellulose ether, ubunzima be-molecular weight kunye nendlela yokuguqulwa kwindlela yokuchasa amanzi amhlophe epeyinti yamatye yokwenene yafundwa ngokugxininiswa.

3.1 Isiphumo sedosi

Ngokunyuka komthamo we-hydroxyethyl cellulose ether, ukuxhathisa kwamanzi okumhlophe kwepeyinti yamatye yokwenyani kuyehla ngokuthe ngcembe. Ubuninzi be-ether ye-cellulose, inani lamaqela e-hydroxyl yamahhala, amanzi amaninzi aya kwenza iibhondi ze-hydrogen kunye nayo, izinga lokufunxa kwamanzi kwifilimu yepeyinti yelitye lokwenyani liya kwanda, kwaye ukuxhathisa kwamanzi kuya kuncipha. Amanzi amaninzi kwifilimu yepeyinti, kulula ukwenza mhlophe umphezulu, ngoko ke ukuchasana kwamanzi okumhlophe kubi.

3.2 Isiphumo sobunzima bemolekyuli

Xa ubungakanani be-hydroxyethyl cellulose ethers ezinobunzima obuhlukeneyo bemolekyuli bufana. Okukhona ubukhulu bemolekyuli buba bukhulu, kokukhona ukuxhathisa kokwenziwa mhlophe kwamanzi kwipeyinti yamatye yokwenyani, nto leyo ebonisa ukuba ubunzima bemolekyuli be-hydroxyethyl cellulose ether bunempembelelo kuxhathiso lwamanzi olumhlophe lwepeyinti yamatye yokwenyani. Oku kungenxa yokuba iibhondi zemichiza > iibhondi ze-hydrogen > amandla e-van der Waals, kokukhona ubukhulu bemolekyuli obunxulumene ne-cellulose ether, oko kukuthi, ubukhulu beqondo lepolymerization, kokukhona amaqhina ekhemikhali abunjwa kukudityaniswa kweeyunithi zeglucose, kwaye kokukhona kusiba nkulu ngakumbi. amandla entsebenziswano yenkqubo yonke emva kokwenza iibhondi ze-hydrogen ngamanzi, okukhona ukomelela kokufunxa kwamanzi kunye nomthamo wokugcina amanzi, kokukhona ukuxhathisa kwamanzi okumhlophe kwepeyinti yamatye yokwenene.

3.3 Impembelelo yendlela yohlengahlengiso

Iziphumo zovavanyo zibonisa ukuba i-nonionic hydrophobic modification ingcono kuneyokuqala, kwaye ukuguqulwa kwe-anionic kubi kakhulu. I-non-ionic hydrophobically modified cellulose ether, ngokufakela amaqela e-hydrophobic kwitsheyini yemolekyuli ye-cellulose ether. Kwangaxeshanye, ukutyeba kwesigaba samanzi kuphunyezwa nge-hydrogen bonding yamanzi kunye ne-molecular chain entanglement. Ukusebenza kwe-hydrophobic yenkqubo kuncitshisiwe, ukwenzela ukuba ukusebenza kwe-hydrophobic yepeyinti yamatye yangempela kuphuculwe, kwaye ukuchasana kwamanzi amhlophe kuphuculwe. I-Anionically modified cellulose ether iguqulwa yi-cellulose kunye ne-polyhydroxysilicate, ephucula ukusebenza kakuhle, ukusebenza kwe-anti-sag kunye nokusebenza kwe-anti-splash ye-cellulose ether, kodwa i-ionicity yayo yomelele, kunye nokugcinwa kwamanzi kunye nokugcinwa kwamanzi kuphucula. yepeyinti yamatye yokwenene iba mbi.

4. Isiphelo

Ukufunxwa kwamanzi kunye nokuba mhlophe kwepeyinti yamatye yokwenyani kuchatshazelwa zizinto ezininzi ezifana nenani le-cellulose ether kunye nendlela yokuguqulwa kobunzima bemolekyuli. Ukufunxwa kwamanzi kunye nokumhlophe kwepeyinti yamatye yangempela.