Selulosi ni polysaccharide ikora ubwoko butandukanye bwa ethers zishobora gushonga mu mazi. Celulosi zigabanya ubushyuhe ni polymers zitari ionic zishobora gushonga mu mazi. Ikoreshwa ryayo ni ndende cyane, imaze imyaka irenga 30, kandi hari ubwoko bwinshi. Iracyakoreshwa mu marangi hafi ya yose ya latex kandi ni yo akoreshwa cyane mu gutera ubushyuhe. Celulosic thickeners zikora neza cyane mu buryo bw'amazi kuko zigabanya ubushyuhe mu mazi ubwazo. Mu nganda zikora amarangi, cellulose thickeners zikoreshwa cyane ni: methyl cellulose (MC), hydroxyethyl cellulose (HEC), ethyl hydroxyethyl cellulose (EHEC), hydroxypropyl cellulose (HPC), hydroxypropyl methyl cellulose (HPMC) na hydroxyethyl cellulose yahinduwe mu mazi (HMHEC). HEC ni polysaccharide ishobora gushonga mu mazi ikoreshwa cyane mu gutera ubushyuhe mu marangi ya latex yubatswe mu buryo bwa matt na semi-gloss. Ifite ubushyuhe bwinshi buboneka mu byiciro bitandukanye bya viscosity kandi inyunganizi zifite iyi cellulose zifite ibara ryiza kandi zigumana neza n'ububiko.
Imiterere yo kuringaniza, kurwanya gusenya, gukora filime no kurwanya kugwa kw'urumuri biterwa n'uburemere bwa molekile bwa HEC. HEC n'izindi polima zishongesha amazi zitajyanye n'amazi zituma urumuri rukomera. Ibikoresho bigabanya ubushyuhe bya selulose bishobora gukoreshwa byonyine cyangwa bivanze n'ibindi bikoresho bigabanya ubushyuhe kugira ngo haboneke rheology yihariye. Eteri za selulose zishobora kugira uburemere butandukanye bwa molekile n'ubwoko butandukanye bwa viscosity, kuva ku gisubizo gito cya molekile gifite uburemere bwa 2% bw'amazi gifite viscosity ya 10 MPS kugeza ku buremere bwinshi bwa molekile bwa 100 000 MP.S. Ubwinshi buke bwa molekile bukunze gukoreshwa nk'ibice bikingira muri polymerization ya latex paint emulsion, kandi ubwoko busanzwe (viscosity 4 800–50 000 MP·S) bukoreshwa nk'ibinini. Uburyo ubu bwoko bwa quincoser buterwa n'amazi menshi ya hydrogen bonds n'aho iminyururu yayo ya molekile ihurira.
Selulosi gakondo ni polymeri ifite uburemere bwinshi bwa molekile irushaho gukomera binyuze mu gufungana hagati y’iminyururu ya molekile. Bitewe n’ubushyuhe bwinshi ku gipimo gito cyo gukata, ubushobozi bwo kugorora ni bubi, kandi bigira ingaruka ku rumuri rwa firime yo gusiga. Iyo igipimo cyo gukata kiri hejuru, ubushyuhe ni buke, ubushyuhe bwa firime yo gusiga ni bubi, kandi firime yo gusiga yuzuye ntabwo ari nziza. Imiterere ya HEC, nko kudakoresha uburoso, gufata amashusho no gusiga imirasire, bifitanye isano itaziguye n’ihitamo ry’icyuma gikonjesha. Nanone imiterere yayo nko kudakoresha imirasire no guhagarara igizweho ingaruka cyane n’ibikoresho bikonjesha.
Selulosi yahinduwe hifashishijwe amashanyarazi (HMHEC) ni icyuma gikomeza ubwinshi bwa selulosi gifite uburyo bwo guhindura ubwinshi bwa hydrophobic ku migozi imwe n'imwe ifite amashami (amatsinda menshi ya alkyl y'imigozi miremire ashyirwa ku mugozi mukuru w'inyubako). Iki gipfukisho gifite ubunini bwinshi ku gipimo cyo hejuru cyo gukata bityo bigatuma habaho firime nziza. Nka Natrosol Plus Grade 330, 331, Cellosize SG-100, Bermocoll EHM-100. Ingaruka zacyo zo gukuba zigereranywa n'iz'ibice bikomeza ubwinshi bya ether bya selulosi bifite uburemere bunini bwa molekile. Binoza ubunini n'ubunini bwa ICI, kandi bigabanya ubunini bw'ubuso. Urugero, ubunini bwa HEC ni hafi 67 MN/m, naho ubunini bwa HMHEC ni 55~65 MN/m.
HMHEC ifite ubushobozi bwo gusukira neza, kurwanya kugwa, ubushobozi bwo kugorora, irabagirana neza kandi irinda ibara ry'uruhu. Ikoreshwa cyane kandi nta ngaruka mbi igira ku ikorwa rya firime ry'irangi rya latex ringana n'uduce duto. Ikora neza kandi irwanya ingese. Iyi firime ikora neza ikorana neza na sisitemu za vinyl acetate copolymer, kandi imikorere yayo isa n'indi firime ivangavanze, ariko hamwe n'uburyo bworoshye bwo kuyikoresha.
Igihe cyo kohereza ubutumwa: Werurwe-16-2023