Ke hoʻoholo nei i ka maikaʻi o ka hydroxypropyl methylcellulose

I kēia manawa, ʻoi aku ka nui o nā mākeke no ka hydroxypropyl carboxymethyl cellulose a ʻaʻole kūlike nā kumukūʻai, pehea e hoʻoholo maʻalahi ai i ka maikaʻi o ka hydroxypropyl carboxymethyl cellulose i lilo i mea koʻikoʻi! No laila pehea e hoʻoholo ai i ka maikaʻi o ka hydroxypropyl methylcellulose? ʻO ka mea mua e nānā i ke keʻokeʻo o ka hydroxypropyl cellulose; ʻoiai ʻaʻole hiki i ka keʻokeʻo ke hoʻoholo inā he kūpono ka HPMC no ka hoʻohana ʻana, e hoʻohui kekahi mau mea hana hewa ʻole i kahi mea keʻokeʻo i ka wā o ka hana ʻana, e hoʻopilikia i kona maikaʻi. Akā ma ka ʻōlelo maʻamau, ʻoi aku ka maikaʻi o ka hapa nui o nā cellulose ethers maikaʻi loa.

ʻO ka lua, pili ia i ka maikaʻi o ka hydroxypropyl methylcellulose: ʻo ka nui o ka hydroxypropyl carboxymethyl cellulose he 80-100 mesh, emi iho ma mua o 120 mesh, a me ka hydroxyethyl cellulose HECHPMC ma kahi o 100 mesh. ʻO ka hapa nui o ka hpmc he 60-80 mesh. ʻO ka maʻamau, ʻoi aku ka palupalu o ka methyl cellulose, ʻoi aku ka maikaʻi o ka hoʻopuehu.

ʻO ka māmā o ka cellulose ether i loko o ka hopena: e hoʻokomo i ka HPMC i loko o ka wai e hoʻopuka i kahi solution colloidal transparent, ʻoi aku ka kiʻekiʻe o ka mālamalama, ʻoi aku ka kiʻekiʻe o ka mālamalama, ʻoi aku ka haʻahaʻa o nā mea hiki ʻole ke hoʻonā.

Ke hoʻomehana ʻia ka mea kūʻai aku, gels a i ʻole loko a laila heheʻe. He hydrophobic a hiki ke hoʻoheheʻe ʻia. ʻO ka ʻiʻo ka mea nui e hoʻopaʻa ai a me ka demulsifying maka no ka pauka putty pale wai. ʻO ke kumu o ka pale ʻana i ka wai penei: ke hui pū ʻia ka pauka latex redispersible a me ka sima me ka wai, e hoʻomau ka pauka latex e hoʻi i ke ʻano emulsion kumu, a ʻo nā ʻāpana latex e hoʻopuehu like i loko o ka slurry sima. Ma hope o ka hui ʻana o ka sima i ka wai, hoʻomaka ka hopena hydration, a hiki i ka hopena Ca(OH)2 i ka saturation a ua hoʻokahe ʻia nā kristal. I ka manawa like, ua hoʻokumu ʻia nā kristal ettringite a me ka calcium silicate hydrate colloids, a waiho ʻia nā ʻāpana latex ma luna o ka gel a me nā ʻāpana cement unhydrated, e like me ka hopena o ka hydration, hoʻomau ka hoʻonui ʻana i nā huahana hydration, a me nā ʻāpana latex me ka mālie. e hōʻiliʻili i loko o nā hakahaka o nā mea ʻole e like me ke kima, a hana i kahi papa paʻa paʻa ma ka ʻili o ka gel sima. , Ma muli o ka emi iki ʻana o ka wai maloʻo, ua hoʻopili ʻia nā ʻāpana latex i hoʻopaʻa ʻia i loko o ka gel a me nā voids e hana i kahi kiʻiʻoniʻoni hoʻomau, e hana ana i kahi hui me ka interpenetrating matrix o ka paʻi sima, a hana i ka paʻi sima a me nā pauka ʻē aʻe. ua pipili kekahi i kekahi.