Hiki ke hui pū ʻia ka sodium hydroxypropyl methyl cellulose a me carboxymethyl cellulose

Hiki iā HPMC a me CMC ke hui pū

Methyl cellulosehe keʻokeʻo a keʻokeʻo e like me ka pauka fibrous a granular paha; ʻAʻala ʻole, ʻono ʻole. ʻO kēia huahana i loko o ka pehu wai i loko o kahi hopena colloidal maʻemaʻe a liʻiliʻi paha; ʻAʻole hiki ke hoʻoheheʻe ʻia i loko o ka ethanol piha, chloroform a i ʻole diethyl ether. Hoʻopuehu koke ʻia a pehu ʻia i ka wai wela ma 80-90 ℃, a hoʻoheheʻe koke ʻia ma hope o ka hoʻoilo. Paʻa loa ka hopena wai ma ka lumi wela, a hiki ke gel i ka wela kiʻekiʻe, a hiki ke loli ka gel me ka hopena me ka mahana.

He maikaʻi loa ka wettability, dispersion, adhesion, thickening, emulsification, ka paʻa ʻana o ka wai a me ka hoʻokumu ʻana i ke kiʻiʻoniʻoni, a me ka ʻaila impermeability. ʻO ke kiʻiʻoniʻoni he paʻakikī maikaʻi loa, hiki ke maʻalahi a me ka ʻike. No ka mea he non-ionic, hiki ke hoʻohālikelike me nā emulsifiers ʻē aʻe, akā maʻalahi ka paʻakai i waho, a paʻa ka hopena i ka laulā o PH2 - 12. Sodium carboxymethyl cellulose ʻO kēia huahana ka paʻakai sodium o cellulose carboxymethyl ether, no ka anionic cellulose ether, he keʻokeʻo keʻokeʻo keʻokeʻo keʻokeʻo fibrous pauka a i ʻole ʻāpana, density 0.5-0.7 g / cubic centimeter, aneane ʻole, ʻono ʻole, hygroscopic. E maʻalahi e hoʻopuehu i loko o ka wai i loko o ka hopena gelatinous akaka, hiki ʻole ke hoʻoheheʻe ʻia i ka ethanol a me nā mea hoʻoheheʻe organik ʻē aʻe.

Ke 6.5 — 8.5 ka pH o ka wai wai, e emi loa ka viscosity o ka slurry i ka pH >10 a i ʻole <5, a ʻoi aku ka maikaʻi o ka hana inā he 7 ka pH. No ka paʻa wela, piʻi wikiwiki ka viscosity ma lalo 20 ℃, hoʻololi mālie i ka 45 ℃, a emi nui ka colloid denaturation a me ka viscosity a me nā waiwai ke hoʻomehana ʻia no ka manawa lōʻihi ma luna. 80 ℃. Hiki ke hoʻoheheʻe ʻia i loko o ka wai, ʻalohilohi ka hopena; Paʻa loa ia i ka hopena alkaline, a maʻalahi hoʻi e hydrolyze i ka hihia o ka waikawa. Ke 2-3 ka pH waiwai, e hiki mai ka ua, a e hiki mai ka ua i ka hihia o nā paʻakai metala multivalent. ʻO Hydroxypropyl methyl cellulose, i ʻike ʻia he hydroxypropyl methyl cellulose, cellulose hydroxypropyl methyl ether, ʻo ia ke koho ʻana o ka pulupulu maʻemaʻe maʻemaʻe ma ke ʻano he kumu, ma lalo o nā kūlana alkaline e ka etherification kūikawā a me ka hoʻomākaukau.

Hiki ke hoʻoheheʻe ʻia i loko o ka wai a me ka polar C a me ka ʻāpana kūpono o ka ethanol/wai, propanol/wai, dichloroethane, etc., hiki ʻole ke hoʻoheheʻe ʻia i ka diethyl ether, acetone, ethanol piha, pehu ʻana i loko o ka wai anuanu i loko o kahi hopena colloidal māmā a turbidized iki. Loaʻa i ka hoʻonā wai ka hana ʻili, ke ʻike kiʻekiʻe a me ka hana paʻa.HPMCLoaʻa ka waiwai o ka gel wela. Ma hope o ka hoʻomehana ʻana, hoʻoheheʻe ʻia ka wai wai o ka huahana, a laila hoʻoheheʻe ʻia ma hope o ka hoʻoilo. ʻOkoʻa ka mahana gel o nā kikoʻī like ʻole.