He polysaccharide ka Cellulose e hana ana i nā ʻano ethers wai-soluble. ʻO nā mea hoʻomānoanoa Cellulose he mau polymers wai-soluble nonionic. He lōʻihi loa kona mōʻaukala hoʻohana, ʻoi aku ma mua o 30 mau makahiki, a he nui nā ʻano like ʻole. Hoʻohana mau ʻia lākou i loko o nā pena latex āpau a ʻo ia ke kumu nui o nā mea hoʻomānoanoa. He kūpono loa nā mea hoʻomānoanoa Cellulosic i nā ʻōnaehana wai no ka mea hoʻomānoanoa lākou i ka wai ponoʻī. I ka ʻoihana pena, ʻo nā mea hoʻomānoanoa cellulose i hoʻohana pinepine ʻia:methyl cellulose (MC), hydroxyethyl cellulose (HEC), ethyl hydroxyethyl cellulose (EHEC), hydroxypropyl cellulose (HPC),hydroxypropyl methyl cellulose (HPMC)a me ka hydroxyethyl cellulose i hoʻololi ʻia i ka hydrophobically (HMHEC). ʻO HEC kahi polysaccharide wai-soluble i hoʻohana nui ʻia i ka hoʻomānoanoa ʻana o nā pena latex matt a me semi-gloss. Loaʻa nā mea hoʻomānoanoa i nā ʻano viscosity like ʻole a ʻo nā mea hoʻomānoanoa me kēia cellulose he kūpono loa i ke kala a me ke kūpaʻa mālama.
ʻO nā waiwai hoʻohālikelike, anti-splash, film-forming a me anti-sagging o ke kiʻi ʻili e pili ana i ke kaumaha molekala pili oHEC. Hoʻomānoanoa ʻo HEC a me nā polymers wai-soluble ʻē aʻe i pili ʻole i ka pae wai o ka uhi. Hiki ke hoʻohana ʻia nā mea hoʻomānoanoa cellulose wale nō a i ʻole me nā mea hoʻomānoanoa ʻē aʻe e loaʻa ai ka rheology kūikawā. Hiki i nā ethers cellulose ke loaʻa nā kaumaha molekala pili like ʻole a me nā māka viscosity like ʻole, mai kahi hopena wai kaumaha molekala haʻahaʻa 2% me ka viscosity o kahi 10 mP s a i kahi viscosity kaumaha molekala pili kiʻekiʻe o 100 000 mP s. Hoʻohana pinepine ʻia nā māka kaumaha molekala haʻahaʻa e like me nā colloids pale i ka polymerization emulsion pena latex, a ʻo nā māka i hoʻohana pinepine ʻia (viscosity 4 800–50 000 mP·s) e hoʻohana ʻia e like me nā mea hoʻomānoanoa. ʻO ke ʻano o kēia ʻano mea hoʻomānoanoa ma muli o ka hydration kiʻekiʻe o nā pilina hydrogen a me ka entanglement ma waena o nā kaulahao molekala.
ʻO ka cellulose kuʻuna kahi polymer kaumaha molekala kiʻekiʻe e mānoanoa nui ana ma o ka hihia ma waena o nā kaulahao molekala. Ma muli o ke kiʻekiʻe o ka viscosity ma ka wikiwiki shear haʻahaʻa, ʻaʻole maikaʻi ka waiwai leveling, a hoʻopilikia ia i ka ʻōlinolino o ke kiʻi uhi. I ka wikiwiki shear kiʻekiʻe, haʻahaʻa ka viscosity, ʻaʻole maikaʻi ke kūpaʻa splash o ke kiʻi uhi, a ʻaʻole maikaʻi ka piha o ke kiʻi uhi. ʻO nā ʻano noi o HEC, e like me ke kūpaʻa palaki, ka hoʻopaʻa kiʻiʻoniʻoni a me ka roller spatter, pili pono i ke koho ʻana o ka thickener. Eia kekahi, ʻo kona mau waiwai kahe e like me ke kūpaʻa leveling a me ke kūpaʻa sag e hoʻopilikia nui ʻia e nā thickeners.
ʻO ka cellulose i hoʻololi ʻia me ka hydrophobically (HMHEC) kahi mea hoʻomānoanoa cellulose nona ka hoʻololi hydrophobic ma kekahi mau kaulahao lālā (ua hoʻokomo ʻia kekahi mau hui alkyl kaulahao lōʻihi ma ke kaulahao nui o ke ʻano). ʻOi aku ka viscosity o kēia uhi ma nā wikiwiki shear kiʻekiʻe a no laila ʻoi aku ka maikaʻi o ka hoʻokumu ʻana i ka kiʻiʻoniʻoni. E like me Natrosol Plus Grade 330, 331, Cellosize SG-100, Bermocoll EHM-100. Ua like kona hopena hoʻomānoanoa me nā mea hoʻomānoanoa cellulose ether me ka nui o ka molekala pili nui. Hoʻomaikaʻi 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 HEC ma kahi o 67 mN/m, a ʻo ka ʻili o HMHEC he 55 ~ 65 mN/m.
Loaʻa i ka HMHEC ka hiki ke pīpī maikaʻi loa, anti-sagging, nā waiwai leveling, ka ʻōlinolino maikaʻi a me ka anti-pigment caking. Hoʻohana nui ʻia a ʻaʻohe hopena maikaʻi ʻole i ka hoʻokumu ʻana o ka ʻili o nā pena latex liʻiliʻi. Hana maikaʻi ka hana ʻili a me ka hana anti-corrosion. Hana maikaʻi kēia mea hoʻomānoanoa pili me nā ʻōnaehana vinyl acetate copolymer a he mau waiwai like me nā mea hoʻomānoanoa pili ʻē aʻe, akā me nā ʻano hana maʻalahi.
Ka manawa hoʻouna: ʻApelila-25-2024