Nā ʻokoʻa i nā ʻano kino kino o HPMC a me HEMC

ʻO ka mahana o ka gel kahi hōʻailona koʻikoʻi o ka cellulose ether. Loaʻa i nā mea hoʻonā wai o cellulose ethers nā waiwai thermogelling. Ke piʻi aʻe ka mahana, hoʻomau ka emi ʻana o ka viscosity. Ke piʻi ka mahana o ka hoʻonā i kahi waiwai, ʻaʻole ʻike hou ka solution cellulose ether, akā hana i kahi colloid keʻokeʻo, a hope loa e nalowale kona viscosity. ʻO ka hoʻāʻo wela gel e pili ana i ka hoʻomaka ʻana i ka cellulose ether sample me ka 0.2% o ka neʻe ʻana o ka cellulose ether solution a me ka hoʻomaʻamaʻa mālie ʻana i loko o ka wai ʻauʻau a hiki i ka ʻike ʻana o ka hopena ke keʻokeʻo a i ʻole ke keʻokeʻo gel, a nalowale loa ka viscosity. ʻO ka mahana o ka hopena ka mahana gel o ka cellulose ether.

ʻO ka lakio o ka methoxy, hydroxypropyl a me HPMC kekahi mana i ka solubility wai, ka paʻa wai paʻa, ka hana ʻili a me ka mahana gel o ka huahana. ʻO ka mea maʻamau, ʻo HPMC me ka methoxyl content kiʻekiʻe a me ka haʻahaʻa hydroxypropyl content he mea hiki ke hoʻonui i ka mahana o ka gel. Eia nō naʻe, ʻoi aku ka nui o ka hydroxypropyl maʻiʻo e hoʻemi i ka mahana gel, ka hoʻoheheʻe wai a me ka hana ʻili. No laila, pono e hoʻopaʻa pono nā mea hana cellulose ether i ka ʻike o ka hui e hōʻoia i ka maikaʻi o ka huahana.

Noi hana hale hana

He mau hana like ko HPMC a me HEMC i na mea kukulu hale. Hiki ke hoʻohanaʻia e like me ka dispersant, ka mea mālama wai, ka mānoanoa, ka binder, a me nā mea'ē aʻe. Hoʻohana ʻia ia i ka mortar sima e hoʻonui ai i kona cohesion a me ka hana, hoʻemi i ka flocculation, hoʻonui i ka viscosity a me ka shrinkage, a loaʻa iā ia nā hana o ka paʻa ʻana o ka wai, e hōʻemi ana i ka nalowale o ka wai ma luna o ka ʻili, hoʻonui i ka ikaika, e pale ana i nā māwae a me ka hoʻoheheʻe ʻana i nā paʻakai wai-soluble. etc. Hoʻohana nui ʻia i ka sima, gypsum, mortar a me nā mea ʻē aʻe. Hiki ke hoʻohana ʻia ma ke ʻano he mea hana kiʻiʻoniʻoni, mānoanoa, emulsifier a me stabilizer no ka pena latex a me ka pena resin wai. Loaʻa iā ia ke kūpaʻa ʻaʻahu maikaʻi, kūlike a me ka hoʻopili ʻana, hoʻomaikaʻi i ka ʻili o ka ʻili, paʻa ka acid-base a me ka hoʻohālikelike ʻana me nā puaʻa metala. Ma muli o kona kūpaʻa mālama viscosity maikaʻi, kūpono loa ia e like me ka dispersant i nā uhi emulsion. ʻO nā mea a pau, ʻoiai he liʻiliʻi ka ʻōnaehana, hana maikaʻi a loaʻa i kahi ākea o nā noi.

Hoʻoholo ka mahana gel o cellulose ether i kona kūpaʻa wela i ka noi. ʻO ka mahana gel o HPMC ka mea maʻamau ma waena o 60 ° C a me 75 ° C, ma muli o ke ʻano, ka ʻike hui a me ke kaʻina hana o nā mea hana like ʻole. Ma muli o nā hiʻohiʻona o ka pūʻulu HEMC, ʻoi aku ka kiʻekiʻe o ka mahana gelation, maʻamau ma luna o 80 °C, no laila ʻo kona kūpaʻa i nā mahana kiʻekiʻe e pili ana iā HPMC. Ma ka hoʻohana pono ʻana, i ke kahua kūkulu hale wela, ʻoi aku ka maikaʻi o ka paʻa wai o HEMC me ka viscosity like a me ka dosage ma mua o ka HPMC. ʻOi aku ma ka hema, hoʻohana ʻia ka mortar i kekahi manawa i nā wela kiʻekiʻe. E lilo ana ka cellulose ether o ka gel wela haʻahaʻa i kona mānoanoa a me ka mālama ʻana i ka wai i nā wela kiʻekiʻe, ma laila e hoʻolalelale ai i ka paʻakikī o ka mortar sima a pili pono i ke kūkulu ʻana a me ke kūʻē ʻana.

Ma muli o ka nui o nā pūʻulu hydrophilic i ke ʻano o HEMC, ʻoi aku ka maikaʻi o ka hydrophilicity. Eia kekahi, ʻoi aku ka maikaʻi o ke kūpaʻa kahe o ka HEMC. E ʻoi aku ka maikaʻi o ka hoʻohana ʻana o ka HPMC i ka tile adhesive.