Focus on Cellulose ethers

ʻO nā kumu o nā ʻōpū a me nā pono a me nā hemahema o nā ʻōpala i ka wā o ka noi ʻana o nā huahana cellulose ether

ʻO nā huahana cellulose ether HPMC a me HEMC he mau pūʻulu hydrophobic a hydrophilic. ʻO ka hui methoxy he hydrophobic, a ʻokoʻa ka hui hydroxypropoxy e like me ke kūlana pani. He hydrophilic kekahi a he hydrophobic kekahi. ʻO ka hydroxyethoxy he hydrophilic. ʻO ka mea i kapa ʻia ʻo hydrophilicity ʻo ia ka mea nona ka waiwai o kahi kokoke i ka wai; ka hydrophobicity 'o ia ho'i ka waiwai o ka ho'olele 'ana i ka wai. Ma muli o ka hydrophilic a me ka hydrophobic ka huahana, aia ka huahana cellulose ether i ka hana ma luna, kahi e hana ai i nā ʻōpū ea. Inā hoʻokahi wale nō o nā waiwai ʻelua he hydrophilic a i ʻole hydrophobic, ʻaʻole e hana ʻia nā ʻōhū. Eia nō naʻe, he pūʻulu hydrophilic wale nō ka HEC o ka hui hydroxyethoxy a ʻaʻohe pūʻulu hydrophobic, no laila ʻaʻole ia e hoʻopuka i nā ʻōpū.

ʻO ke ʻano huʻihuʻi pili pono pū i ka helu hoʻoheheʻe o ka huahana. Inā hoʻoheheʻe ʻia ka huahana ma kahi ʻano like ʻole, e puka mai nā ʻōpū. Ma keʻano laulā, ʻoi aku ka haʻahaʻa o ka viscosity, ʻoi aku ka wikiwiki o ka dissolution rate. ʻO ke kiʻekiʻe o ka viscosity, ʻoi aku ka lohi o ka dissolution rate. ʻO ke kumu ʻē aʻe ka pilikia granulation, ʻaʻole kūlike ka granulation (ʻaʻole like ka nui o ka particle, aia ka nui a me ka liʻiliʻi). Hoʻokaʻawale i ka manawa hoʻoheheʻe, hoʻopuka i ka ʻea ea.

Hiki ke hoʻonui i ka ʻāpana o ka ʻōpala ʻana i nā mea maikaʻi o ka ea, ʻoi aku ka maikaʻi o ke kūkulu hale, ʻoi aku ka māmā o ka slurry, a ʻoi aku ka maʻalahi o ka ʻōpala ʻana. ʻO ka hemahema, ʻo ka loaʻa ʻana o nā bubbles e hōʻemi i ka nui o ka nui o ka huahana, e hōʻemi i ka ikaika, a e hoʻopilikia i ka pale ʻana o ka ʻāina.


Ka manawa hoʻouna: Feb-27-2023
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