ʻO ka cellulose kahi polysaccharide e hana i nā ʻano eter hiki ke hoʻoheheʻe ʻia i ka wai.ʻO nā mea mānoanoa o ka cellulose he polymers hiki ke hoʻoheheʻe ʻia i ka wai.He lōʻihi loa kona mōʻaukala hoʻohana, ʻoi aku ma mua o 30 mau makahiki, a he nui nā ʻano.Hoʻohana mau ʻia lākou i nā pena latex āpau a ʻo ia ke kumu nui o nā mānoanoa.He mea maikaʻi loa ka mānoanoa cellulosic i nā ʻōnaehana wai no ka mea e mānoanoa lākou i ka wai.I loko o ka ʻoihana pena, ʻo ka mea maʻamau i hoʻohana ʻia i ka cellulose thickeners: methyl cellulose (MC), hydroxyethyl cellulose (HEC), ethyl hydroxyethyl cellulose (EHEC), hydroxypropyl cellulose (HPC), hydroxypropyl methyl cellulose (HPMC) a me hydrophobically modified hydroxyethyl cellulose ( HMHEC).He polysaccharide hiki ke hoʻoheheʻe wai ʻia ʻo HEC i hoʻohana nui ʻia i ka mānoanoa o nā pena latex a me ka semi-gloss.Loaʻa nā mānoanoa i nā māka viscosity like ʻole a me nā mea mānoanoa me kēia cellulose i loaʻa ka hoʻohālikelike kala maikaʻi a me ka paʻa o ka mālama ʻana.
ʻO ka pae ʻana, anti-splash, hana kiʻiʻoniʻoni a me nā waiwai anti-sagging o ke kiʻi uhi e hilinaʻi ʻia i ke kaumaha molekala pili o HEC.ʻO HEC a me nā polymers hiki ʻole i ka wai i hoʻopaʻa ʻia e mānoanoa i ka pae wai o ka uhi.Hiki ke hoʻohana wale ʻia nā mānoanoa cellulose a i hui pū ʻia me nā mānoanoa ʻē aʻe e loaʻa ai ka rheology kūikawā.Hiki i nā cellulose ethers ke loaʻa nā mea kaupaona pili like ʻole a me nā māka viscosity like ʻole, mai kahi haʻahaʻa haʻahaʻa haʻahaʻa 2% aqueous solution me ka viscosity ma kahi o 10 MPS a hiki i kahi kiʻekiʻe molecular weight viscosity o 100 000 MP.S.Hoʻohana mau ʻia nā māka haʻahaʻa haʻahaʻa kaumaha e like me nā colloids pale i ka polymerization emulsion pena latex, a hoʻohana ʻia nā māka maʻamau (viscosity 4 800–50 000 MP·S) i mea mānoanoa.ʻO ke ʻano o kēia ʻano mānoanoa ma muli o ka hydration kiʻekiʻe o nā paʻa hydrogen a me ka hoʻopili ʻana ma waena o kāna mau kaulahao mole.
ʻO ka cellulose kuʻuna he polymer kaumaha molekala kiʻekiʻe e mānoanoa nui ma o ka hoʻopili ʻana ma waena o nā kaulahao mole.Ma muli o ka viscosity kiʻekiʻe ma ka liʻiliʻi shear rate, ʻilihune ka waiwai pae, a pili ia i ka nani o ke kiʻi uhi.Ma ke kiʻekiʻe o ka shear rate, haʻahaʻa ka viscosity, maikaʻi ʻole ka pale ʻana o ka splash o ke kiʻi uhi, a ʻaʻole maikaʻi ka piha o ke kiʻi uhi.ʻO nā hiʻohiʻona noi o HEC, e like me ke kūpaʻa o ka brush, ke kiʻi ʻoniʻoni a me ka roller spatter, pili pono i ke koho o ka mānoanoa.ʻO kāna mau waiwai kahe e like me ka pae ʻana a me ka pale ʻana i ka sag e pili nui ʻia e nā mānoanoa.
Hydrophobically modified cellulose (HMHEC) he cellulose mānoanoa i loaʻa ka hydrophobic hoʻololi i kekahi mau kaulahao lālā (ua hoʻokomo ʻia kekahi mau pūʻulu alkyl kaulahao lōʻihi ma ke kaulahao nui o ka hale).ʻOi aku ka viscosity kiʻekiʻe o kēia uhi i nā kiʻekiʻe shear rates a no laila ʻoi aku ka maikaʻi o ka hoʻokumu ʻana i ke kiʻiʻoniʻoni.E like me Natrosol Plus Grade 330, 331, Cellosize SG-100, Bermocoll EHM-100.Hoʻohālikelike ʻia kona hopena mānoanoa me ka cellulose ether thickeners me ka nui o ka nui o ka molekala pili.Hoʻonui ia i ka viscosity a me ka pae ʻana o ICI, a hoʻemi i ka ʻili o ka ʻili.No ka laʻana, ʻo ka ʻili o ka HEC ma kahi o 67 MN / m, a ʻo ka ʻili o ka HMHEC he 55 ~ 65 MN / m.
He maikaʻi loa ka HMHEC i ka sprayability, anti-sagging, leveling properties, good gloss and anti-pigment caking.Hoʻohana nui ʻia a ʻaʻohe hopena maikaʻi ʻole i ka hoʻokumu ʻana i ke kiʻiʻoniʻoni o nā pena latex nui.ʻO ka hana kiʻiʻoniʻoni maikaʻi a me ka hana anti-corrosion.ʻOi aku ka maikaʻi o kēia mānoanoa hui pū me nā ʻōnaehana vinyl acetate copolymer, a ua like kāna hana me nā mānoanoa hui ʻē aʻe, akā me nā ʻano hana maʻalahi.
Ka manawa hoʻouna: Mar-16-2023