Cellulose bụ polysaccharide nke na-emepụta ọtụtụ ethers na-agbaze mmiri. Cellulose thickeners bụ polima ndị na-agbaze mmiri na-abụghị ionic. Akụkọ ojiji ya dị ogologo, ihe karịrị afọ 30, e nwekwara ọtụtụ ụdị. A ka na-eji ha eme ihe n'ihe fọrọ nke nta ka ọ bụrụ agba latex niile ma bụrụ isi ihe ndị na-agbaze mmiri. Cellulosic thickeners dị irè nke ukwuu na sistemụ mmiri n'ihi na ha na-eme ka mmiri sie ike n'onwe ha. N'ụlọ ọrụ agba, cellulose thickeners a na-ejikarị eme ihe bụ:methyl cellulose (MC), hydroxyethyl cellulose (HEC), ethyl hydroxyethyl cellulose (EHEC), hydroxypropyl cellulose (HPC),hydroxypropyl methyl cellulose (HPMC)na hydroxyethyl cellulose (HMHEC) nke a gbanwere n'ụzọ hydrophobic. HEC bụ polysaccharide na-agbaze mmiri nke a na-ejikarị eme ihe n'ịkpụ agba latex matt na semi-gloss. A na-enweta ihe ndị na-agba ọkpụrụkpụ n'ọkwa dị iche iche, ihe ndị na-agba ọkpụrụkpụ na cellulose a nwekwara ezigbo ndakọrịta agba na iguzosi ike n'ezi ihe.
Njirimara nhazi, mgbochi mgbasa, nhazi ihe nkiri na mgbochi iwụda nke ihe mkpuchi ahụ dabere na ibu molekul dị n'ime ya.HEC. HEC na polima ndị ọzọ na-agbaze mmiri na-eme ka akụkụ mmiri nke mkpuchi ahụ sie ike. Enwere ike iji ihe ndị na-eme ka cellulose sie ike naanị ha ma ọ bụ jikọta ya na ihe ndị ọzọ na-eme ka ọ sie ike iji nweta rheology pụrụ iche. Cellulose ethers nwere ike inwe ibu molekul dị iche iche na ọkwa viscosity dị iche iche, site na obere molekul dị arọ 2% mmiri mmiri nwere viscosity nke ihe dị ka 10 mP s ruo na viscosity dị arọ molekul dị elu nke 100 000 mP s. A na-ejikarị ọkwa molekul dị ala dị ka ihe nchebe na polymerization nke agba latex, a na-ejikwa akara ndị a na-ejikarị eme ihe (viscosity 4 800–50 000 mP·s) dị ka ihe ndị na-eme ka ọ dị ike. Usoro nke ụdị ihe ndị na-eme ka ọ dị ike a bụ n'ihi nnukwu mmiri nke njikọ hydrogen na njikọ dị n'etiti agbụ molekul.
Cellulose ọdịnala bụ polima dị elu nke na-eme ka ọ sie ike site na njikọ dị n'etiti agbụ molekul. N'ihi oke viscosity na obere ọ̀tụ̀tụ̀ shea, ihe onwunwe nhazi ahụ adịghị mma, ọ na-emetụtakwa gloss nke ihe mkpuchi ahụ. N'ọkwa shea dị elu, viscosity dị ala, resistivity nke ihe mkpuchi ahụ adịghị mma, jupụta nke ihe mkpuchi ahụ adịghị mma. Njirimara ojiji nke HEC, dị ka mgbochi ahịhịa, filming na roller spatter, metụtara kpọmkwem na nhọrọ nke thickener. Ihe onwunwe mmiri ya dị ka ọkwa na resistence sag na-emetụtakarị site na thickeners.
Cellulose nke a na-agbanwe agbanwe site na Hydrophobic (HMHEC) bụ ihe na-eme ka cellulose sie ike nke nwere mgbanwe hydrophobic na ụfọdụ agbụ ígwè nwere alaka (a na-ewebata ọtụtụ otu alkyl ogologo ogologo n'akụkụ isi agbụ nke usoro ahụ). Mkpuchi a nwere viscosity dị elu na oke shear dị elu ma si otú a mee ka mmepụta ihe nkiri ka mma. Dịka Natrosol Plus Grade 330, 331, Cellosize SG-100, Bermocoll EHM-100. Mmetụta ya dị ka nke cellulose ether thickeners nwere oke molekul buru ibu. Ọ na-eme ka viscosity na ọkwa nke ICI ka mma, ma na-ebelata nrụgide elu. Dịka ọmụmaatụ, nrụgide elu nke HEC dị ihe dị ka 67 mN/m, nrụgide elu nke HMHEC dịkwa 55~65 mN/m.
HMHEC nwere ezigbo ike ịgbasa ihe, igbochi ịcha, ikike nhazi, ezigbo mma na mgbochi ịcha agba. A na-eji ya eme ihe nke ukwuu, ọ nweghịkwa mmetụta ọjọọ na nhazi ihe osise nke agba latex dị obere. Ọ na-arụ ọrụ nke ọma na arụmọrụ mgbochi ire ere. Ihe mkpuchi a na-ejikọ ọnụ na-arụ ọrụ nke ọma na sistemụ vinyl acetate copolymer ma nwee ihe ndị yiri ihe mkpuchi ndị ọzọ na-ejikọ ọnụ, mana ọ nwere usoro dị mfe.
Oge ozi: Eprel-25-2024